QP CGSPE26 Chem II 09022026

Vombined Geo-Scientist (Preliminary) Examination, 2026 DO NOT OPEN THIS TEST BOOKLET UNTIL YOU ARE TOLD TO DO SO T.B.C. : BBSP-T-CMT Test Booklet Series Serial No. TEST BOOKLET 0004081 Paper IT CHEMISTRY Time Allowed : Two Hours Maximum Marks : 300 INSTRUCTIONS IMMEDIATELY AFTER THE COMMENCEMENT OF THE EXAMINATION, YOU SHOULD CHECK THAT THIS TEST BOOKLET DOES NOT HAVE ANY UNPRINTED OR TORN OR MISSING PAGES OR ITEMS, ETC, IF SO, GET IT REPLACED BY A COMPLETE TEST ; BOOKLET. Please note that it is the candidate’s responsibility to encode and fill in the Roll Number and Test Booklet Series Code A, B, C or D carefully and without any omission or discrepancy at the appropriate places in the OMR Answer Sheet. Any omission/discrepancy will render the Answer Sheet liable for rejection. You have to enter your Roll Number on the Test Booklet in the Box provided alongside. DO NOT write anything else on the Test Booklet. This Test Booklet contains 120 items (questions). Each item comprises four responses (answers). You will select the response which you want to mark on the Answer Sheet. In case, you feel that there is more than one correct response, mark the response which you consider the best. In any case, choose ONLY ONE response for each item. You have to mark your responses ONLY on the separate Answer Sheet provided. See directions in the Answer Sheet. : All items carry equal marks. Before you proceed to mark in the Answer Sheet the response to various items in the Test Bookiet, you have to fill in some particulars in the Answer Sheet as per instructions sent to you with your Admission Certificate. After you have completed filling in all your responses on the Answer Sheet and the examination has concluded, you should hand over to the Invigilator only the Answer Sheet. You are permitted to take away, with you the Test Booklet. Sheets for rough work are appended in the Test Booklet at the end. Penalty for wrong Answers : THERE WILL BE PENALTY FOR WRONG ANSWERS MARKED BY A CANDIDATE. (i) There are four alternatives for the answer to every question. For each question for which a wrong answer has been given by the candidate, one-third of the marks assigned to that question will be deducted as penalty. (ii) If a candidate gives more than one answer, it will be treated as wrong answer even if one of the given answers happens to be correct and there will be same penalty as above to that question. ii) If a question is left blank i.e. no answer is given by the candidate, there will be no penalty for that question. DO NOT OPEN THIS TEST BOOKLET UNTIL YOU ARE TOLD TO DO SO (ys milord 1. Radial distribution’ function does NOT depend upon (a) Distance from the nucleus (b) Principal quantum number (c) Azimuthal quantum number (d) Orientation of orbital . Which one of the following state- ments regarding wave functions is NOT correct ? (a) Wave functions are three dimen- sional and contain three quantum numbers n, / and m (b) Wave functions represent total movement of a particle over a period (c) Probability density is interpreted as the square of wave function (d) Wave functions should be differ- entiable . Which of the following statements regarding electron configuration of atoms is/are correct ? 1. Principal quantum number = 1, K shell, example : He 2. Principal quantum number = 3, M shell, example : Ne 3. Principal quantum number = 2, L shell, example : F 4. Principal quantum number = 3, K shell, example : Si Select the answer using the code given below : (a) 1 only (b) 1 and 3 only (c) 2 and 4 (d) 1, 2 and 3 BBSP-T-CMT — A 10 4. Which one of the following represents the correct order of boiling point among Li, Be, B and Zn? (a) B>Li>Be> Zn (b) Zn>Be>B>Li (c) -Li> Be:> ZnB (d) B>Be>Li>Zn . The correct group, period and block for element Hassium (Hs) is (Given : atomic number of Hs = 108) (a) 13 group, 7" period, p-block (b) 15" group, 7 period, p-block (c) 6 group, 6" period, d-block (d) 8" group, 7" period, d-block . Consider the following statements regarding the modern periodic table : 1. Elements in group 16 are also known as chalcogens 2. Elements in groups 3-12 are known as p-block elements 3. The f-block elements are also known as inner transition ele- ments 4. Elements of groups 13-18 are known as transition elements 5. Elements in group 2 are also known as alkaline earth metals Which of the statements given above are correct ? (a) 2 and 4 (b) 1, 4 and 5 (c) 1,3 and 5 (d) 3, 4 and 5 7. ‘Which one of the following state- ments regarding general properties of Ss, p, d and f-block elements is NOT correct ? (a) The compounds of s and p-block elements are mostly white in color (b) All s-block elements are metals (c) Most stable oxidation state for all ‘> lanthanides is 3+ (d) The complexing ability of lantha- nides is more in comparison with the d-block elements Which of the following order(s) of ionic radii is/are correct ? LO?" OS" = Seat 2. TP ec AE es a 3. O% < F< Nat < Mgt ‘Select the answer using the code given below : (a) lL only (b) -1 and 2 only (c) 2 and 3 only (d) 1, 2 and 3 + Which one of the following is the correct value of the effective nuclear charge (Z,,) for the 3d electron of * chromium ? (a) 4-95 (b) 11-0 (c) 4-60 (d) 11-35 10. Which one of the following represents if, 12. the correct order of solubility of Li,CO;, Na,CO;, K,CO;, Rb,CO, and Cs,CO, in water ? (a) LiyCO,; > Na,CO, > K,CO, > Rb,CO, > Cs,CO, (b) Cs,CO, > Rb,CO; > K,CO, > Na,CO; > Li,CO, (c) Na,CO; > Li,CO, > K,CO, > Rb,CO; > Cs,CO, (d) Cs,CO; > Li,CO; > Rb,CO, > K,CO, > Na,CO,; Which one of the following is expected to possess highest electronegativity ? (a) Al (b) Ga (c) In (d) Tl ‘Consider the following statements regarding catenation nitrogen : tendency of 1. Nitrogen has weaker catenation tendency than carbon due to repulsion between non-bonding lone pair electrons on nitrogen 2. Single bond energy of CH,-CH, is much higher than HJN—NH, 3. Three or more nitrogen atoms can be joined through some multiple bonds Which of the statement(s) given above is/are correct ? (a): -1,:25and 3 (b) 1 and 2 only (c) 1 only (d) 3 only A — BBSP-T-CMT 13s 14. 15: 16. 17. Which one of the following is expected to exist in gaseous state ? (a) WF, (b) UF, (Cc) CL (d) ScCl, Which one of the following metal ions is diamagnetic ? (a). Ti** (b) v* (c): Gut (d) Co?* Which one of the following is the most unstable in nature ? (a) PFs (b) AsCl, (c) SbCl, (d) BiF, The hydrolysis of SiCl, proceeds through (a) Sy! mechanism (b) S,2 mechanism (c) Proton transfer (d) Reductive elimination Which one of the following combi- nation of products, respectively are formed during the reaction of diborane with oxygen and water ? BBSP-T-CMT —- A 18. 19; (a) B,O;, B(OH), (b) B,0;, B,H,OH (c) B(OH)3, B,O, (4) B,O,, B,H,OH The radius of Na* ion is 0-95 A and that of Cl ion is 1-81 A. In which one of the following sites Na* ions will prefer to occupy in the crystal lattice of Cr ions ? (a) Plane trigonal {b) Tetrahedral (c) Octahedral (d) Body-centred cubic Consider the following information available for an ionic binary com- pound : 1. Madelung Constant 2. Interionic distance 3. Charges of the anions and cations 4. Ionic radii of anions and cations Which of the information given above is/are required to estimate lattice energy using Born-Landé equation ? (a) 3 only (b) 1 and 2 only (c) 1, 2 and 3 only (a) 1, 2,3 and 4 ix 20. 21. 22. 23. Which of the following statement(s) regarding polarizability is/are correct ? 1. Small, highly charged cations have high polarizing power 2. Large, highly charged anions are easily polarized 3. Cations that do not have a noble- gas electron configuration are easily polarized Select the answer using the code given below : (a) 1, 2 and 3 (b) 1 only (c) 3 only (d) 1 and 2 only Sodium chloride reacts with sodium vapour to give a non-stoichiometric compound Na,,5Cl. This leads to (a) Frenkel defect (b) Schottky defect (c) F center (d) Wadsley effect The number of type of bonds between two carbon atoms in calcium carbide is (a) One o and one z (b) One o and two z (c) Two o and one z (d) Two o and two 2 Which one of the following is a correct combination of coordination number, geometry and hybridization ? 24. 25. 26. (a) 3, linear, sp? (b) 5, trigonal pyramidal, sp3d? (c) 4, square planar, sp?d (d) 3, tetrahedral, sp? vo H The correct order of bond lengths in the above structure is ; (a) I>1> TI (b) I> > Hl (c) Il>1>IL qd) >>I The spin only magnetic moment of [Cr(CO)g] is (a) 2:84 BM (b) 5:92 BM (c) 4:90 BM (d) 0 BM (diamagnetic) Which of the following statement(s) regarding hydrazine is/are correct ? 1. It acts as an ambidentate ligand 2. It acts as a monodentate ligand 3. It acts as a bridging ligand 4. It does not bind with metal Select the answer using the code given below : (a) 4 only (b) 2 only (c) 1 and 3 (d) 2 and 3 A — BBSP-T-CMT 27. Which one’ of the following is the correct IUPAC name for the compound K,[Cr(CO)(NH3)(CN),] ? (a) Potassium amminetetracyano- carbonylchromate(III) (b) Potassium amminecarbonyl- tetracyanochromate(II) (c). Potassium amminecarbonyl- tetracyanochromate(0) (d) Potassium amminetetracyano- carbonylchromate(I) 28. The meridional isomer of a coordi- nation compound [MAB] contains : (where, M is the metal and A and B are ligands) (a) All A and B ligands arranged at the vertices of a planar hexagon (b) All A ligands in one plane and B ligands in a perpendicular plane in octahedral geometry (c) A and B_ ligands randomly arranged at the vertices of an octahedron (d) All A or B ligands are adjacent, occupying the vertices of a triangular face of octahedron 29, [Co(NH;),Cl,] exhibits (a) Fac- and mer- geometrical iso- merism (b) Cis- and trans- geometrical iso- "~ merism (c) R- and S- optical isomerism (d) Linkage isomerism BBSP-T-CMT - A 30. 31. 32. Consider the following reaction : Nb,S, + 5HgO = Nb,O, + 5 HgS On the basis of the relative electro- negativity and charges on the various ions, hard and soft character of the acids and bases, which one of the following is correct ? (a) The products are favoured (b) The reactants are favoured (c) Nb,O,; is favoured, however the reaction does not proceed due to HgS (d) HgS formation is _ favoured, however the reaction does not proceed due to Nb,O; Which one of the following is correct regarding addition of acetic acid to sulphuric acid, water and ammonia, respectively ? (a) Acetic acid behaves as a base in sulphuric acid, weak acid in water and strong acid in ammonia (b) Acetic acid behaves as a weak acid in sulphuric acid, water and ammonia (c) Acetic acid behaves as a weak acid in water and strong acid in sulphuric acid aid ammonia (d) Acetic acid behaves as strong acid in sulphuric acid and ammonia and as weak acid in water What will happen, if a 1-0 M solution of a weak acid is diluted to 0-01 M at constant temperature ? (a) K, will increase (b) Degree of ionization will increase (c) pH will decrease by 2 units (d) [H*] will decrease to 0-01 M 33. Consider the following statements regarding the ionic product of water : (where C;,+ and Co, are the concen- tration of hydrogen and hydroxide ions of water, respectively and Ky is the ionic product of water) 1. The value of Ky at 25°C is 1x 10-4 y 2. Cy+ = Coy- in pure water 3. Ky increases with temperature 4. Cyt = Ky for pure water -Which of the statements given above are correct ? (a) 1 and 2 only (b) 1 and 3 only (c) 2 and 4 only (d) 1, 2,3 and 4 34. An aqueous solution contains 0-3 mol/ litre of KHSO, and 0-6 mol/litre of K,SO,. The pH of the solution will be (The pKa value for HSO, is 2-0 and log 2-0 = 0:30) (a) 23 (b) 0-3 (c) 2-0 (d) 43 35. Which one of the following does NOT act as Buffer in its aqueous solution ? (a) Borax (b) NH,HF, (c) CH,;COONa (d) NH; +NH,Cl 36. 37. Which one of the following is the correct form of Henderson’s equation for calculating the pH of a weak acid solution containing its salt ? (a) pH = pK, + log lee) 2.” [conjugate base] (b) pH = pK, + log [eowusate base] [acid] (©) pH = pK, - log —_laeid]_ [conjugate base] (@) pH = pK; — log Leomugate acid) [base] Which one of the following equations is used to get molarity (M) of a standard solution ? Weight of solute in gm (a) ~ Molecular weight of solute 1000 Volume of solution (mL) (b) Me Weight of solute in gm Equivalent weight of solute 1000 Volume of solution (mL) Volume of solute (mL) Molecular weight of solute 1000 Weight of solution (gm) (c) M= Volume of solute (mL) Equivalent weight of solute 1000 Weight of solution (gm) (d) M= A — BBSP-T-CMT 38. 39. 40. Despite of being obtained in high purity, sodium thiosulphate is un- suitable as a primary standard. This is because : 1. CO, present in ordinary distilled water may decompose it 2. It can be decomposed by bacterial action 3. It decomposes upon exposure to light Select the correct answer using the code given below : (a) 1 and 2 only (b) 1 and 3 only (c) 2 and 3 only (d) 1, 2 and 3 A sharp end point is NOT achieved during titration of boric acid against NaOH. The sharp end point can be observed (a) By addition of suitable Lewis acid to the solution (b) By using diphenylamine sulphonic acid as indicator (c) By addition of suitable organic polyhydroxy compounds (d) By using xylenol-orange as indi- cator Which one of the following indicators is NOT used as acid-base indicator ? (a) Methyl orange (b) Phenolphthalein (c) Murexide (d) Methyl red BBSP-T-CMT -— A 41. 42. 43. At a specific temperature, the ratio of the mean kinetic energy of hydrogen to oxygen gas is (a) 1:16 (b) 1:8 (c)) 124 (dj) Tet The root mean square velocity of one mole of a monoatomic gas having molar mass M is u,.. Which one of the following correctly represents the relation between the average kinetic energy of the gas (£) and u,,,, ? aE (a) Urms aa 2 M E (c) Urms ~ 2M E (4) Urms = 399 Initially in a container having an ideal gas, all the molecules had the same translational energy of 6-0 x 107! J. After some time, due to random motion of the molecules, the energies of the molecules were distributed according to the Maxwell-Boltzmann distribution law. The final temperature of the system is (Given : k = 1-38 x 10° JK") (a) 289-72 K (b) 0-481 K (c) 481-1 K (d) 2-898 K 44. Which one of the following has the highest value of most probable speed ? (a) H,(g) at -73°C (b) .CH,(g) at 27°C (c) N,(g) at 1027°C (d) 0,(g) at 0°C 45. The root mean square velocity of gas A at 27°C was found to be equal to the root mean square velocity of gas B at 327°C. The ratio of molar mass of A to B is (a) 109:9 (b) 9: 109 (ce) 2:31 (d) 1:2 46. The Maxwell-Boltzmann distribution Fraction of molecules at 8 a 0.002 0.0005 curves of oxygen, nitrogen, carbon dioxide and methane gases were plotted at 300 K and following graph was obtained 0.003 0.0015 4 0.001 0 200 400 600 800 1000 1200 1400 1600 Velocity (m/s) 47. 48. Identify the curves (1, 2, 3 and 4) with the appropriate: gases and select the correct answer (a) 1-CO,, 2-O,, 3-N,, 4-CH, (b) 1-CH,, 2-N,, 3-0, 4-CO, (c) 1-CHy, 2-CO,, 3-O,, 4-N, (d) 1-CO), 2-N5, 3-O,, 4-CH, A steel vessel contains a mixture of H, and O, in a 2:1 molar ratio at a constant temperature T and pressure p. If the volume of H, gas collected in 10 min is 15 mL at the same T and p, what will be the volume of O, gas collected in 20 min at the same T and p ? (a) 3-8 mL (b) 1:9 mL (c) 3-2 mL (d) 5-6 mL The average velocity of a gas mole- cule of O, at 25°C and 1 bar is 400 ms"! and its collision frequency is 2-0 x 10° s!. The mean free path and the average time between collisions are respectively (a) 500 nm and 1-25 x 10>s (b) 200 nm and 5-0 x 107s (c) 50 nm and 2-0 x 10!°s (d) 200 nm and 5-0 x 10! A — BBSP-T-CMT 49. 50. Ss Which of the following is/are correct when 131 g of zinc is allowed to react with hydrochloric acid at 27°C ? (Given : Molar mass of Zn is 65-4 g mol” and R=8-3 JK! mol’) 1. The reaction involved is Zn +2 HCl — ZnCl, +H, 2. When the reaction mixture is kept in a closed vessel of fixed volume, work done is zero 3. When the reaction mixture is kept in an open vessel, the reaction mixture does 4-98 kJ of work driving back the atmosphere Select the answer using the code given below : (a) 1 and 2 only (b) 3 only (c) 1 and 3 only (d) 1, 2 and 3 A sample of an ideal gas changes its volume from 3-00 L to 6-00 L against an external pressure of 2:50 atm and simultaneously absorbs 1000 J of heat. The change in internal energy of the system is (1 L atm = 101-325 J) (a) -760 J (b) 240 J (c) -—240 J (d) 760 J Match List I with List II and select the correct answer using the code given below the Lists : BBSP-T-CMT - A 10 52. List I List II (Property/ (Intensive/ Variable) Extensive and SI unit) A. U 1. Intensive, B. H, J mol! 2. Extensive, J C. pe 3. Extensive, EK! Die P 4. Intensive, J mol !K"! Code : AB ae Dp 1) pemesay) 4 1 3 (By 2 1 43 (Ge) 3 1 4 2 (di: 43 4 1 2 Consider the reversible isothermal expansion of 5-00 mol of an ideal gas from 0-500 dm} to 1-500 dm? at 300 K. (Given: R = 8-314 JK"! mol and log 3 = 0-4771) Which of the following are true for the above system ? 1. AU=0 2. AH=0 3. w =-13-7 kJ 4.q=13-7kI Select the answer using the code given below : (a) 1 and 2 only (b) 1, 2 and 3 only (c) 3 and 4 only (d) 1, 2, 3 and 4 533 54. 55. Sphalerite (ZnS) is the sulphide ore of zinc. Given: A Hoos (in kJ mol!) for sphalerite, ZnO(s) and SO,(g) are —206, 348 and —296, respectively, the A,.H5og (in kJ mol") for the roasting of sphalerite ore will be (a) -850 (b) 438 (c) —438 (d) -258 In a porcelain dish exposed to air at 27°C, 1:22 g of benzoic acid is burned, releasing 31,700 J of heat. The enthalpy change (AH) and internal energy change (AU) for the process are, respectively (Given : Molar mass of benzoic acid is 122 g mol!) (a) -31,688 J and —31,700 J (b) 31,700 J and -30,453 J (c) 31,700 J and —31,637 J (d) —31,700 J and —31,688 J Which of the following statements are correct ? 1. The rate of change of AH° with respect to temperature is equal to AG, 2. For a reaction involving only ideal gases AC, is independent of temperature 3, Acoos— AU x93= 0 for glucose 4. When a substance is in its thermo- dynamic standard state, the sub- stance must be at 25°C 11 _ Select the answer using the code 56. EE given below : (a) 1 and 2 (b) 2 and 3 (c) 1 and 3 (d) 3 and 4 Which one of the following statements must be true for an endothermic reac- tion to be spontaneous under standard conditions at constant pressure and at a certain temperature T? (a) AS° must be positive and greater ) than (b) AS®° must be positive and less than AH? vi AS®° must be negative and greater (©) () than — (d) AS° must be negative and less fine: AH’ Suppose the coldest reservoir we have at hand is at 12°C. If we want:a heat engine that is at least 90% efficient, the minimum temperature of the required hot reservoir should be (a) 2577K (b) 2577°C (c) 100°C (d) 373K A — BBSP-T-CMT 58. Which of the following transforma- tions will show positive entropy change ? 1. 1 mol of H,O (1, 273 K, 101-325 kPa) — 1 mol of-H,0 (s, 273 K, 101-325 kPa) 2. 1 mol of H,O (1, 273 K, 101-325 kPa) — 1 mol of H,O (1, 373 K, 101-325 kPa) 3. 1 mol of H,O (1, 373 K, 101-325 kPa) — 1 mol of H,O (g, 373 K, 101-325 kPa) 4. 1 mol of H,O (g, 373 K, 10-1325 kPa) — 1 mol of H,O (g, 373 K, 101-325 kPa) Select the correct answer using the ‘code given below : (a) 1 and 2 only (b) 2 and 3 (c) 1, 2 and 4 (d) 3 and 4 59. The correct value for the non-expan- sion work that can be obtained from the combustion of 2-00 mol of methane under standard conditions at 300 K is Given that : A,S° =-243 JK"! mor, A, H°(CHy, g) =-75 kJ mor", A;-H°(CO>, g) = -393 kI mol!, A,H°(H,0, 1) = -286 kJ mol"! (a) -1760 kJ (b) -1634 kI (c) 144 kJ (d) -817 kI BBSP-T-CMT — A 12 60. Which one of the following graphs correctly represents the variation of Gibbs energy with pressure ? (a) (b) (c) (d) Gibbs energy, G Gibbs energy, G Gibbs energy, G Gibbs energy, G Gas Liquid Solid Pressure, p Solid Liquid : Gas Pressure, p 61. 62. Consider the following statements regarding the criteria for spontaneous processes in closed systems : 1. If a system is isolated, its entropy cannot decrease 2. If S of a closed system is fixed and no work is done, U cannot increase 3. dA<0 (simple closed system, T and V constant) Which of the statement(s) given above is/are correct ? (a) 1 and 2 only (b) 1 only (c) 2 and 3 only (d) 1, 2 and 3 At 300K, Z-2-butene isomerises to E-2-butene with AG°= -3-44 kJ mol! SS Z ee Sa E-2-butene Z-2-butene A catalyst for isomerisation is added to a vessel that is kept at 300K along with a small amount of Z-2-butene. The mole fraction of E-2-butene in the vessel when equilibrium is reached is : (Given: R = 8-31 JK! mot! and In 2 = 0-69) (a) 0-23 (b) 0:34 (c) 0-56 (d) 0-80 13 63. 64. The osmotic pressure of 0-01 mol dm? solutions of the following substances was measured at 300 K : 1. Acetic acid in benzene 2. Acetic acid in water 3. NaCl in water 4. Glucose in water Which one of the following is the correct order (increasing) of osmotic pressure of the above solutions ? (a) Glucose in water, acetic acid in water, acetic acid in benzene, NaCl in water (b) Glucose in water, acetic acid in benzene, acetic acid in water, NaCl in water (c) Acetic acid in benzene, glucose in water, acetic acid in water, NaCl in water (d) NaCl in water, acetic acid in water, acetic acid in benzene, glucose in water 1 mol benzene (Pf encenc = 6-0 k Pa) and 2 mol toluene (Pooivene = 4:8 k Pa) are mixed to form a solution. Which one of the following statements regarding the above solution is NOT correct ? (a) Total vapour pressure of the solution is 5-2k Pa (b) Mole fraction of vapours of benzene above the liquid mixture is 0-33 ‘ (c) The solution will follow Raoult’s law (d) The solution will not show any ' appreciable change in volume A — BBSP-T-CMT 65. 66. The correct labels for the given plots of vapour pressure against the mole fraction of solute is Vapour pressure ——-—> Mole fraction of solute ———-> (a) 1-Ideal solution (Raoult), 2-Ideal solution (Henry), 3-Real solution (b) 1-Ideal solution (Henry), 2-Real solution, 3-Ideal solution (Raoult) (c) 1-Ideal solution (Henry), 2-Ideal solution (Raoult), 3-Real solution 1-Real solution, 2-Ideal solution (Henry), 3-Ideal solution (Raoult) (d) A polymer X is dissolved in a suitable solvent and the osmotic pressure (77) of solutions of various concentrations (c) is measured at 27°C. The intercept of a plot of Nm *) cl(gdm™) found to be 25. The molar mass of X in against c/(g dm) is kg mol is (Given : R= 8-314 J K"! mol!) (a) 100 (b) 997 () 9976 (d) 99768 BBSP-T-CMT —A 14 67. 68. 69. Which of the following statements regarding the colligative properties of solutions containing: a’ non-volatile electrolyte are correct ? 1. The vapour pressure of the pure solvent is higher than that of the solution 2. The vapour pressure of the: pure solvent is less than that of the solution 3. Only solute molecules solidify at the freezing point 4. Only solvent molecules solidify at the freezing point Select the answer using the code given below : ; (a) 1 and 3 (b) 2 and 4. (c) 1 and 4 (d) 2 and 3 Which one among the following is NOT a factor affecting the boiling point elevation constant ? (a) (b) (c) The molar mass of the solute The molar mass of the solvent The enthalpy of vaporization of the solvent (d) The boiling point of the solvent The Henry’s Law constant (for the dissolution of gases in liquids) has the unit of (a) Pa (b) kg mor! (c) mL (d) K kg mot! 70. “AG 72. When a conductivity cell is filled with a 0-001 mol L™ solution of NaNO, its resistance is found to be 6000 Q. The molar conductance of the solution is given as 120S cm? mol". The cell constant of the given conductivity cell is (a) 0-72 cm! (b) 1-0 cm (c) 0-072 cm! (d) 2-0 cm! The A® values for calcium acetate, sodium acetate and sodium iodide solutions are 202, 91 and 1278S cm? mol! respectively at 298K. The A®, for calcium iodide is (a) 238 S cm*mo!! (b) 274S cm’mot! (c) 365 Scm*mol! (d) 456 S.cm*mot! A potential difference of 4-5 V is applied across two electrodes placed 10-0 cm apart in a dilute solution of a salt of X at 27°C. How far would the X~ ion be expected to move in 2 hours ? [Given : A(X-) = 80 S cm? mol", F = 96,500 C mol] (a) 2-7 cm (b) 5:9 cm (c) 13-2 cm (@) 45 cm 15 73. The conductivity of a 74. saturated solution of AgCl was found to be 1-8 x 10° S cm"! at 25°C after correc- tion for the conductivity of pure water. What is the molar conductivity of Cl ions at infinite dilution, if the molar conductivity of Ag* ions at infinite dilution is 62-0 S cm? mot! and the solubility product of AgCl is 1-69 x 10°19 M? at 25°C? (a) 76-5 S cm* mol! (b) 200-4 § cm? mol! (c) 63-4 S cm? mol! (d) 138-4 S cm? mol! Consider the following statements regarding two electrolytes ‘X’ and ‘Y’ whose molar conductivities increase by" a factor of 20 and 1-5 respectively, on dilution : Statement —1 : ‘X’ isa strong electro- - lyte and ‘Y’ is a weak electrolyte For weak electrolytes the increase in molar conductivity is due to the increase in degree of dissociation of the electrolyte on dilution Statement —2 : Which one of the following is correct in respect of above statements ? (a) Both statement 1 and statement 2 are true and statement2 is the correct explanation of statement 1 Both statement 1 and statement 2 are true and statement 2 is not the correct explanation of statement 1 Statement 1 is true but state- ment 2 is false (b) (c) Statement 1 is false but state. ment 2 is true (@) A — BBSP-T-CMT 75. 76. Debye-Hiickel theory explains the dependence of the conductance of strong electrolytes on their concentra- tion. This theory also explains the other properties of ionic solutions. ListI gives the conditions for con- ductance of aqueous electrolytic solutions, while List II provides the names of corresponding effects. Match List I with List I and select the correct answer using the code given below the lists : List I List II A. Ionic 1. Electrophoretic atmosphere effect B. Solvated ionic 2. Wien effect atmosphere 3. Asymmetric C. Increased effect conductance 4. Debye- under high Falkenhagen potential effect D. Increased conductance at high frequency Code : Ae Bae oC. 3D (a) 4 1 28 (b) 42 1 3 (c) 3 1 2 ae (d) 3 2 1 4 What molality of NaCl is needed so that it has the same ionic strength as 0-100 m Ca3(PO,), ? (a) 0-300 m (b) 0-500 m (c) 1-00 m (d) 1-500 m BBSP-T-CMT — A 16 77. Match List-I with List-II and select the correct answer using the code given below the lists : List I List II (conductometric (titration titration) curve) AHCI vs KOH” 1: 6 Dakain B. HCl vs NH,OH ¥& A c C..CH,COOH ys" NaOH 5 ‘VOLUME OF BASE D. Oxalic acid vs 8 NaOH e a. N c E 3 ‘VOLUME OF BASE c oO N D U c nee A N c E VOLUME OF BASE 4. c oO N D U c T eee A N c E ‘VOLUME OF BASE Code : As Be Gp (a) 3 2am 1 (b) 3 422 1 (c) 1 Be Ae ES (d) 1 aaa eae 78. 79. 80. Consider the following statements regarding transport number:: Statement —1 : Cd?* shows negative transport number in highly concentrated solutions of Cdl, Statement—2 : Transport numbers of ions are directly pro- ‘portional to their speeds Which of the statement(s) given above is/are correct ? (a) Neither 1 nor 2 (b) Both 1 and 2 (c) 1 only (d) 2 only During the titration of 50-0 mL of a 0:10 mol L*! solution of acetic acid (K, = 1-810) with a 0-10 mol L7! solution of sodium hydroxide, the specific conductance after addition of 50-0 mL of sodium hydroxide will be : (Given : 4 cincoo" = 40-9x104S m*mol!, 2, = 50-1x104S mmol!) Na (a) 0-455 S m! (b) 0-910 mS m! (c) 0-455 mS m! (d) 0-910 S nr! In the determination of the transport number of Li* ion by the moving boundary method, a 0-10 M solution of » LiCl was taken in a cell having uniform area of cross section of 1-0 cm*. At the end of the experiment the boundary moved by 2-0cm and 0-09 g of silver was deposited on the cathode of a silver coulometer. The transference number of Li* ion is 17 o- o o- ; NO, : NO, NO, NO. (Given : Faraday = 96,500 C mot; Atomic mass of Ag = 108) (a) 0-24 (b) 0-40 (c) 0-60 (d) 0-76 81. The correct decreasing order of basi- city of the following anions is 2 I 0 rH (a) U>M>I () I>M>1 (c) Il>I>1 (@) U>I>m 82. The types of hybridization exhibited by the carbon atoms in the given com- pound are oy H (a) sp? and sp? only (b) sp? and sp only (c) sp and sp° only (d) sp, sp? and sp? A — BBSP-T-CMT 83. 84. 85. BBSP-T-CMT — A Which one of the following molecular orbitals will be formed by combina- tion of the two 2p orbitals as shown below ? ss Seer Rp |e Out-phase (a) bonding z molecular orbital (b) bonding o molecular orbital (c) antibonding z* molecular orbital (d) antibonding o* molecular orbital Which one of the following com- pounds can be most readily converted into carbon free radical ? OC HC=CH I II H 9 H,C=CH, seine | CH, Il IV (a) I (b) II () (d) IV Which one of the following is correct for the molecules given below ? 18 86. 87. Hq, Me ON I ‘cC=C= (e I NO, I IL (a) Both I and II are chiral (b) Lis chiral and II is achiral (c) I is achiral and II is chiral (d) Both I and II are achiral Predict the relationship between the pair of compounds given below : (a) Enantiomers (b) (c) (d) Identical Diastereomers Constitutional isomers The correct IUPAC name of the given compound is NH, Ph me OH (a) (1S, 2R)-2-Amino-1,2- diphenylethan-1-ol (b) (1R, 2S)-2-Amino-1,2- diphenylethan-1-ol (c) (1S, 2S)-2-Amino-1,2- diphenylethan-1-ol (d) (1R, 2R)-2-Amino-1,2- diphenylethan-1-ol 88. The relationship between the com- pounds given below is Ph Ph C=C=C=C and O,N: ‘NO, : ‘NO. Pp 2 C=C=C=C \ 89. 90. Ph ON (a) Optical isomers (b) Constitutional isomers (c) Geometrical isomers (d) Regioisomers Which one of the following com- pounds has the highest preference to exist as gauche conformer ? 1,2-Dichloroethane 1,2-Dibromoethane I Il 1,2-Difluoroethane n-Butane Ul IV (a) I (b) I (c) WM (d) IV Which one among the following pairs is NOT correctly matched ? 19 ot (a) Predominant pathway E2 Statement Cyclohexyl bromide reacts with sodium ethoxide in ethanol tert-Butyl ‘bromide reacts with sodium ethoxide in ethanol The strength of the nucleophile is important in determining rate Rearrangements are possible in product formation (b) ©) (d) El In an experiment, the rate of racemiza- tion of 2-iodooctane by sodium iodide (Na!3!1) in acetone was compared with the rate of incorporation of radioactive iodine into 2-iodooctane acetone i te sly Be en I 131y See as " If we assume that each incorporation proceeds stereospecifically with inver- sion of configuration then we can conclude that (a) There will not be any observable racemization The rate of racemization will be equal to the rate of incorporation of radioactive iodine The rate of racemization will be twice the rate of incorporation of radioactive iodine The rate of incorporation of radio- active iodine will be twice the rate of racemization (b) (c) (d) A — BBSP-T-CMT 92. The number of methyl groups at the axial and equatorial positions, respec- tively in the most stable conformation of the major product formed in the following reaction are TsQ Me Me QTs Me ‘Me (a) Three and one (b) Two and two (c) One and three (d) Zero and four 93. The major products [X] and [Y] formed in the following reaction sequence are Me m-CPBA, CHCl, a (i) NaOMe A * "(i H,O work up H Me Me (a) aC) get ENG = “OH nee H OMe Me . _ Me (b) pa noe = E “OH Ae e OMe Me Me Se A “OMe H “O ake Me Me (a) OS! ae E =~ “OMe HO ail 94. The product(s) formed due to neighbouring group participation in the following reaction is/are BBSP-T-CMT — A 20 O Ph-{ Br, ce] ——~» Product(s) Ph Ph Ph Ph oo oo oo (omgexe) us er oe or Br “Br “Br I 0 m IV (a) I and I (b) II and IV (c) Only II (d) II and IV 95. Consider the following statements about the reactivity of compounds I-IV : C(CHs3)3 CH3 OPNB OPNB I Il PhSOCH2CH2C! PhSO2CH,CI I IV where OPNB is p-nitrobenzoate 1. Compound I undergoes solvolysis in aqueous acetone slower than. II -.2. Compound I undergoes solvolysis in aqueous acetone faster than II 3. Compound III reacts with KI slower than IV 4. Compound III reacts with KI faster than IV Which of the statements given above are correct ? (a) 1 and 3 (b) 1 and 4 (c) 2 and 3 (d) 2 and 4 96. The major products [X] and [Y] formed in the following reactions are Ph Me H NaOEt Me Br heat Et D Cl NaOEt fe heat D Ph Et Qa > oe Me Me "WD and its enantiomer D ) Ph Me sn “ a me O Me Et and its enantiomer ©) Bo” ie & c) [X]= ae ig Mé Me ‘D and its enantiomer D Ph Me A @ m= =X m= Pi Me Et D and its enantiomer 97. Consider the following statements with respect to compounds A and B Ceci Cle 4 A B 1. The dihedral angle between Cl and H on adjacent carbons in compound A is 180° 21 2. The dihedral angle between Cl and H on adjacent carbons in compound B is 0° 3. Compound A_ undergoes HCl elimination about 8 times faster than compound B How many of the above statement(s) is/are correct ? (a) Only one (b) Only two (c) All three (d) None 98. Which one of the following statements regarding the given reaction sequence is correct ? : Br Br I I Il (a) The major product of the reaction is I and is called Hofmann product ii) HpSO4, A (b) The major product of the reaction is II and is called Zaitsev product (c) The major product of the reaction is III and is called Hofmann product (d) The major product of the reaction is IMI and is called Zaitsev product A — BBSP-T-CMT 99. Which one of the following alkyl bro- mides will give exclusively one terminal mono-substituted alkene upon dehydro- bromination by an E2 process ? (a) 3-bromo-3-methylpentane (b) 3-bromo-2-methylpentane (c) 2-bromo-2,3-dimethylbutane ‘(d) 2-bromo-3,3-dimethylbutane 100. The mechanism of the following reac- tion involves the sequential conversion of OH H2SO, heat (a) 1° carbocation to 3° carbocation to 3° carbocation (b) 1° carbocation to 2° carbocation to 2° carbocation ‘ (c) 1° carbocation to 2° carbocation to 3° carbocation ~ (d)_ 1° carbocation to 3° carbocation to 2° carbocation 101. A potential energy diagram is shown below for the El mechanism of indicated reaction BBSP-T-CMT - A 22 CH3 —CH3CHZOH CH3—-C-CH3 mages Br 1 CH; CH3 CH3—C-CHg 6 > 1 3 ~ Potential energy —> Reaction coordinate ——>- By applying Hammond’s postulate to the potential energy diagram for this reaction, which one of the following statements is correct ? (a) The structure of transition state 2 is more carbocation-like than tran- sition state 4 (b) The structure of transition state 2 is less carbocation-like than transi- tion state 4 (c) The structure of transition state 2 resembles 1 more than it re- sembles 3 (d) The structure of transition state 4 resembles 5 more than it re- sembles 3 102. The major product formed in the following reaction is CN 3 benzoyl peroxide ‎ ge A (a) H ५८ ੦੦੦੦੨ ( Me 60062116 () NC ८००८४१६ (4) [ NC 62 23 103. Consider the catalytic hydrogenation of compounds P, Q and R as indicated in the table. The number of carbocyclic rings and z-bonds present in com- pounds P, Q and R have been indicated. Complete the table by identifying the missing positions described by notations W, ®, ¥ and 7. Com- |Mole- |Mole- |Num- | Num- pound|cular ` ୦୩୫୮ எலி | ber of formula] formula] carbo- | m-bonds before jafter | cyclic | present hydro- |hydro- |rings gena- |gena- | present tion tion (+| 2 11 . 2 (018 2 1 | » | 0:14 (1530 | 2 (8) W = (40082, X = (1022, ¥ = 3 and Z = 1 (0) W = (40080, X = 0020 ¥ = 2 and Z = 2 () W = (4076 X = (10722, ¥ = 0 and 2 = 4 (ત) W = (40078, X = மிடி ¥ = 1 and 2 = 3 A ¬ BBSP-T-CMT 104. The major product formed in the following reaction is OH OH lp, NaHCO3 COMe | ether/H,O, 0°C (a) | OH Oo~ ~CO,Me (b) OH 2. ~Co,Me (c) | OH fo) CO,Me (d) OH fo) CO2Me 105. Consider the following statements : 1. The anti-addition of a symmetric reagent to a symmetric cis-alkene gives racemic product 2. The anti-addition of a symmetric reagent to a symmetric trans- alkene gives racemic product 3. The syn-addition of a symmetric reagent to a symmetric cis-alkene gives racemic product 4. The syn-addition of a symmetric reagent to a symmetric trans-alkene gives meso product BBSP-T-CMT — A How many of the above statement(s) is/are true ? (a) Only one (b) Only two (c). Only three (d) All of the above . Which one of the following statements is correct regarding the outcome of the indicated reaction ? <e HBr (1 equiv.) hac Ts Tita ee ee prodiiets: (a) At low and high temperature, 1,4-addition product is the major one (b) At low and high temperature, 1,2-addition product is the major one (c) At low temperature, 1,2-addition product is the major one while at high temperature, 1,4-addition product is the major one (d) At low temperature, 1,4-addition product is the major one while at high temperature, 1,2-addition product is the major one 107. The total number of 1,4-addition © Br reactions involved in the synthesis of target molecule [X] using the indicated starting material is/are e) fe) (2 moles) (d) OH COOEt i [X] 109. The major product formed in the (a) One following reaction is (b) Two é | (c) Three 0 Basin 2. H20 | (d) Four 108. The major product formed in the following reaction sequence is ais Bro, Fe 2. dil. DySOx 3. Li 4. HO (b) 25 A — BBSP-T-CMT 110. 111. Consider the following statements : 1. 4-Chloro-3-nitroacetophenone _re- acts with sodium methoxide in methanol slower than 4-chloro-3- nitrotoluene 2. 4-Chloro-3-nitroacetophenone re- acts with sodium methoxide in methanol faster than 4-chloro-3- nitrotoluene 3. 1-Bromo-2,4-dinitrobenzene reacts with sodium methoxide in metha- nol faster than 1,4-dibromo-2-nitro- benzene 4. 1-Bromo-2,4-dinitrobenzene reacts with sodium methoxide in metha- nol slower than 1,4-dibromo-2- nitrobenzene Which of the statements given above are correct ? (a) 1 and 3 (b) 1 and 4 (c) 2 and 3 (d) 2 and 4 The most reasonable cyclohexadienyl cation intermediate involved in the mechanism of following isomerization reaction is BBSP-T-CMT - A 26 CH(CHs)> H3C CH3 HCI, AICly i = 7360°C CHg CH(CH3). CH3 HC CHs ee oe! H(CHa)2 H3C ® H @ cH, ee 112. Which one of the following reactions does NOT follow the addition- elimination pathway ? (8) Phe ‎ > oy, EtOH & . 9) 10: £ Ce NaoMe 102 | > ‘OMe 113. 114. $02148 1422 2 > 3 Ph (0) cr 1. 1402, warm Cx SNC '4 ` 2. Xv The number of 3 and sp” carbons, respectively, present in the Meisen- heimer complex, formed in the follow- ing reaction are 2,4,6-Trinitroanisole __NaOEt , Meisenheimer complex (48097104308) (a) Three and six (b) Four and five (c) Five and four (d) Six and three The major products [X] and [Y] formed in the following reactions are OH [ ® 3 ? OH CH; 7 =+.‏ [x] (mixture of cis- and trans-isomers) 27 115. 073 (® ‎ 8 = = 03 Ph 2‎ CHs ‎ CH3 Ph 7 6‎ © 05 43 113 Ph 0 ൫ (= 9 ಗರ್ಗ ‎ © Which one of the following 1,2-diols is the least reactive for acid catalyzed pinacol-pinacolone rearrangement ? (a) HO OH Ph 1186" ~ , ) HO OH F3C CF3 683 HO Ph (6) Ph OH Ph A ¬ BBSP-T-CMT 116. The reactive intermediates 1-4 that are OBs OBs likely to be formed in the given reaction are shown below : Cl I i H* MeO OBs ; Bs = os—{ Br MeO. L Ce , (a) W<1<U MeO MeO 1 2 ©) U<I<W MeO MeO. (@) W<mM<I (S) | 118. Which one of the following statements 3 4 about the indicated reaction is correct ? What is the sequence of their formation OH ‘eh in the mechanism of the above ———~ Major product reaction ? Br Br Br (a) 34214 Br ss Br i : (bl) 3545132 (a) The major product of the reaction is I and is achiral (C) 143-42 (b) The major product of the reaction is I and is chiral (d) 1343-2 (c) The major product of the reaction is II and is chiral 117. The relative order of reactivity for solvolysis of the following compounds (d) The major product of the reaction in acetic acid is is II and is achiral BBSP-T-CMT - A 28 119. The major product formed in Reaction I and Reaction II are Reaction I : . Ht (1R,2R)-2-bromocyclohexan-1-o0l —> Reaction II : Ht (1S,2R)-2-bromocyclohexan-1-0l —> (a) Reaction I: (1S,2S)-1,2-dibromocyclohexane Reaction II : (1S,2S)-1,2-dibromocyclohexane (b) Reaction I: (18;2S)-1,2-dibromocyclohexane Reaction II: (1R,25)-1,2-dibromocyclohexane (c) Reaction I: (1R,2R)-1,2-dibromocyclohexane Reaction II: (1R,2S)-1,2-dibromocyclohexane (d) Reaction I: (1R,2R)-1,2-dibromocyclohexane Reaction II: (1R,2R)-1,2-dibromocyclohexane 29 120. In the solvolysis reactions of I and II in aqueous ethanol, which one of the following statements is true ? ae CI ““SPh I ““SPh I OH ““SPh “’SPh Ut IV (a) I reacts faster than I and the major product formed is II (b) I reacts faster than II and the major product formed is IV (c) If reacts faster than I and the major product formed is III (d) II reacts faster than I and the major product formed is IV A — BBSP-T-CMT SPACE FOR ROUGH WORK -BBSP-T-CMT — A 30 SPACE FOR ROUGH WORK 31 A — BBSP-T-CMT SPACE FOR ROUGH WORK BBSP-T-CMT — A 32