1.Which of the following statements is true:
(a)Melting point of Phosphorous is less than that of Nitrogen
(b)`N_{2}` is highly reactive while `P_{4}` is inert
(c)Nitrogen shows higher tendency of catenation than P
(d)N-N is weaker than P-P
3. Identify the law which is stated as: “For any solution, the partial vapour pressure of each volatile component in the solution is directly proportional to its mole fraction.”
9. During dehydration of alcohols to alkenes by heating with concentrated `"H"_{2}"SO"_{4}`, the initiation step is:
13. The boiling points of alcohols are higher than those of hydrocarbons of comparable masses due to:
32. Metal M ions form accp structure. Oxide ions occupy ½ octahedral and ½ tetrahedral voids. What is the formula of the oxide?
33. The reaction of toluene with C`"l"_{2}` in presence of FeC`"l"_{3}` gives ‘X’ while theof toluene with C`"l"_{2}` in presence of light gives ‘Y’. Thus ‘X’ and ‘Y’are:
34.Ozone is a/ an __________ molecule and the two O-O bond lengths in ozone are (i)_______-and (ii) ____________
(a) A= COOH-`("CH"_{2})_{4}` -COOH, B= OHC-(CHOCO`"CH"_{3})_{4}` -`"CH"_{2}`OCO`"CH"_{3}`
38. A unit cell of NaCl has 4 formula units. Its edge length is 0.50 nm. Calculate the density if molar mass of NaCl = 58.5 g/mol.
(a)I2< Br2<F2<Cl2 [ increasing bond dissociation enthalpy]
(b) H2O > H2S<H2Te<H2Se [ increasing acidic strength]
(c) NH3 < N2O< NH2OH<N2O5 [ increasing oxidation state]
(d) BiH3<SbH3<AsH3<PH3<NH3 [ increasing bondangle]
(a)(i) and (iv)
Which of the following is the best matched options?
52. Complete the following analogy: Same molecular formula but different structures: A:: Non superimposable mirror images: B
55. A “good fit” is considered to be one where the cation can touch:
2. Which of the following is a non-stoichiometric defect?
(a)Frenkel defect
(b)Schottky defect
(c)metal deficiency defect
(d)interstitial defect
3. Identify the law which is stated as: “For any solution, the partial vapour pressure of each volatile component in the solution is directly proportional to its mole fraction.”
(a)Henry’s law
(b) Raoult’s law
(c)Dalton’s law
(d)Gay-Lussac's Law
(a) Schottky defect
(b)Frenkel defect
(c) Metal excess defect
(d) Metal deficiency defect
(a) 1,2-dicholorbenzene
(b) 1,3 -dichlorobenzene
(c) 1,4-dicholorbenzene
(d) all isomers have same melting points
(a) Formation of pentaacetate of glucose with acetic anhydride.
(b) formation of addition product with 2,4 DNP reagent
(c) Silver mirror formation with Tollen’s reagent
(d) existence of alpha and beta forms of glucose.
(a) `"SN"^{1}` reaction
(b) Elimination reaction
(c) `"SN"^{2}` reaction
(d) Nucleophilic addition reaction
(a) HCl gas is produced, due to the action of sunlight.
(b) a mixture of HOCl and HCl is produced in the presence of light
(c) HOCl and hydrogen gas is produced
(d) a mixture of HCl and ClO3 is produced, due to the action of sunlight
9. During dehydration of alcohols to alkenes by heating with concentrated `"H"_{2}"SO"_{4}`, the initiation step is:
(a) protonation of alcohol molecule
(b) formation of carbocation
(c) elimination of water
(d) formation of an ester
(a) isotropic
(b)anisotropic
(c) isotopic
(d) isomeric
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11. Which of the following reactions is used to prepare salicylaldehyde?
(a) Kolbe’s reaction
(b) Etard reaction
(c) Reimer- Tiemann reaction
(d) Stephen’s reduction.
(a)sea water
(b)sugar solution
(c)smoke
(d)22 carat gold
13. The boiling points of alcohols are higher than those of hydrocarbons of comparable masses due to:
(a) Hydrogen bonding
( b) Ion – dipole interaction
(c) Dipole- dipole interaction
(d) Van der Waal’s forces.
(a)`"H"_{2}"O"`
(b)`"H"_{2}"S"`
(c)`"H"_{2}"Se"`
(d)`"H"_{2}"Te"`
17. Which of the following is a correct statement for `"C"_{2}"H"_{5}`Br?
18. Covalency of nitrogen is restricted to:
25. In which of the following cases blood cells will shrink:
26. How much ethyl alcohol must be added to 1 litre of water so that the solution will freeze at– 14°C ? (Kf for water = 1.86°C/mol)
(a)Fibrous proteins are generally soluble in water
(b)Albumin is an example of fibrous proteins
(c)In fibrous proteins, the structure is stabilised by hydrogen bonds and disulphide bonds
(d)pH does not affect the primary structure of protein.
16. Major product obtained on reaction of 3-Phenyl propene with HBr in presence of organic peroxide
(a)3- Phenyl 1- bromopropane
(b) 1 –Phenyl -3- bromopropane
(c) 1-Phenyl -2-bromopropane
(d) 3-Phenyl -2- bromopropane
17. Which of the following is a correct statement for `"C"_{2}"H"_{5}`Br?
(a) It reacts with metallic Na to give ethane.
(b) It gives nitroethane on heating with aqueous solution of `"AgNO"_{2}`
(c) It gives `"C"_{2}"H"_{5}`OH on boiling with alcoholic potash.
(d) It forms diethylthioether on heating with alcoholic KSH.
(a)2
(b)3
(c)4
(d)5
(a)endothermic and reversible process
(b)exothermic and reversible process
(c)endothermic and irreversible process
(d) exothermic and irreversible process
(a)Nitrogen
(b)Arsenic
(c)Antimony
(d)Bismuth
(a)glucose
(b)maltose
(c)glycogen
(d)lactose
(a)Hydrogen
(b)Oxygen
(c)Nitrogen
(d) Helium
(a)miscible in limited amount of water
(b) miscible in excess of water
(c) miscible in water in all proportions
(d) immiscible in water
(a) +1
(b) +3
(c)+5
(d)+7
(a)when placed in water containing more than 0.9% (mass/ volume) NaCl solution.
(b)when placed in water containing less than 0.9% (mass /volume) NaCl solution.
(c)when placed in water containing 0.9% (mass/volume) NaCl solution.
(d)when placed in distilled water.
26. How much ethyl alcohol must be added to 1 litre of water so that the solution will freeze at– 14°C ? (Kf for water = 1.86°C/mol)
(a) 7.5 mol
(b)8.5 mol
(c)9.5 mol
(d)10.5 mol
(a) CH3Cl / AlCl3
(b) CH3Cl, Na, Dry ether
(c)CH3Cl/Fe dark
(d) NaNO2/ HCl /0-50C
(a) It can reduce tollen’s reagent however cannot reduce fehling’s reagent
(b) It undergoes mutarotation like glucose and fructose
(c) It undergoes inversion in the configuration on hydrolysis
(d) It is laevorotatory in nature .
(a) acidic nature of phenol
(b) partial double bond character of C-OH bond
(c) partial double bond character of C-C bond
(d)instability of phenoxide ion
(a)Nitrogen
(b)Phosphorus
(c)Oxygen
(d)Sulphur
32. Metal M ions form accp structure. Oxide ions occupy ½ octahedral and ½ tetrahedral voids. What is the formula of the oxide?
(a)MO
(b)M`"O"_{2}`
(c)M`"O"_{3}`
(d) `"M"_{2}``"O"_{3}`
33. The reaction of toluene with C`"l"_{2}` in presence of FeC`"l"_{3}` gives ‘X’ while theof toluene with C`"l"_{2}` in presence of light gives ‘Y’. Thus ‘X’ and ‘Y’are:
(a) X = benzyl chloride Y = o and p – chlorotoluene
(b) X = m – chlorotoluene Y = p – chlorotoluene
(c) X = o and p–chlorotoluene Y = trichloromethylbenzene
(d) X= benzyl chloride, Y = m-chlorotoluene
34.Ozone is a/ an __________ molecule and the two O-O bond lengths in ozone are (i)_______-and (ii) ____________
(a) linear ,110pm ; 148pm
(b) angular, 110pm ; 148pm
(c)linear, 128pm ; 128pm
(d)angular, 128pm ; 128pm
(a)diffusion
(b)vapour pressure difference
(c) osmosis
(d)reverse osmosis
36. In the following reaction,identify A and B
(a) A= COOH-`("CH"_{2})_{4}` -COOH, B= OHC-(CHOCO`"CH"_{3})_{4}` -`"CH"_{2}`OCO`"CH"_{3}`
(b) A= COOH-`("CH"_{2})_{4}` -CHO , B= OHC-(CHOCO`"CH"_{3})_{4}` -`"CH"_{2}`OCO`"CH"_{3}`
(c) A= OHC-(CHOCOC`"H"_{3})_{3}`-C`"H"_{2}`OCOC`"H"_{3}` B= COOH-`"(CH"_{2})_{4}` -CHO ,
(d) A= OHC-(CHOCOC`"H"_{3})_{4}`-C`"H"_{2}`OCOC`"H"_{3}` B= COOH-(C`"H"_{2})_{4}` -COOH
(a)Absorption of litmus by [`"Al(OH)"_{4}`] -
(b)Absorption of litmus by `"Al(OH)"_{3}`
(c)Adsorption of litmus by [`"Al(OH)"_{4}`] -
(d) Adsorption of litmus by Al`"(OH)"_{4}`
(b)Absorption of litmus by `"Al(OH)"_{3}`
(c)Adsorption of litmus by [`"Al(OH)"_{4}`] -
(d) Adsorption of litmus by Al`"(OH)"_{4}`
38. A unit cell of NaCl has 4 formula units. Its edge length is 0.50 nm. Calculate the density if molar mass of NaCl = 58.5 g/mol.
(a) 1 g/`"cm"^{3}`
(b)2 g/`"cm"^{3}`
(c) 3 g/`"cm"^{3}`
(d)4 g/`"cm"^{3}`
(a)I2< Br2<F2<Cl2 [ increasing bond dissociation enthalpy]
(b) H2O > H2S<H2Te<H2Se [ increasing acidic strength]
(c) NH3 < N2O< NH2OH<N2O5 [ increasing oxidation state]
(d) BiH3<SbH3<AsH3<PH3<NH3 [ increasing bondangle]
(a) Propanal and propyl magnesium bromide
(b) 3-methylbutanal and 2-methyl magnesium
(c) 2-dimethylpropanone and methyl magnesium iodide
(d) 2- methylpropanal and isopropyl magnesium iodide
(a) o- hydroxy benzyl chloride
(b) 2- chloromethylphenol
(c) o-chloromethylchlorobenzene
(d) 4-hydroxymethylphenol
(a) Ammonia is the weakest reducing agent and the strongest base among Group 15 hydrides.
(b) Ammonia is the strongest reducing agent as well as the strongest base among Group 15 hydrides.
(c) Ammonia is the strongest reducing agent as well as the weakest base among Group 15
(d) Ammonia is the strongest reducing agent and the weakest base among Group 15 hydrides.
(i)CH3CH2CH(OH)CH3
(ii) (C2H5)3COH
(iii)
(b)(i) and (iii)
(c)(i) and (ii)
(d)(i), (iii) and (iv)
(a) allyl bromide
(b) vinyl bromide
(c) bromoform
(d) vicinal dibromide
Assertion (A): Electron gain enthalpy of oxygen is less than that of Flourine but greater than Nitrogen.
Reason (R): Ionisation enthalpies of the elements follow the order Nitrogen > Oxygen > Fluorine
Select the most appropriate answer from the options given below:
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
Assertion (A): Alkyl halides are insoluble in water.
Reason (R): Alkyl halides have halogen attached to sp3 hybrid carbon. Select the most appropriate answer from the options given below:
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not the correct explanation of A.
(c)A is true but R is false.
(d) A is false but R is true.
Assertion(A): Molarity of a solution changes with temperature.
Reason (R): Molarity is a colligative property. Select the most appropriate answer from the options given below:
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not the correct explanation of A.
(c)A is true but R is false.
(d) A is false but R is true.
Assertion(A):SO2 is reducing while TeO2 is an oxidising agent.
Reason(R):Reducing property of dioxide decreases from SO2 to TeO2. Select the most appropriate answer from the options given below: (a) Both A and R are true and R is the correct explanation of A (b) Both A and R are true but R is not the correct explanation of A. (c)A is true but R is false. (d) A is false but R is true.
Assertion (A):Cryoscopic constant depends on nature of solvent. Reason(R ):Cryoscopic constant is a universal constant. Select the most appropriate answer from the options given below:
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not the correct explanation of A.
(c)A is true but R is false.
(d) A is false but R is true.
| I | II |
| (i)Amino acids | (A)protein |
| (ii)Thymine | (B)Nucleic acid |
| (iii)Insulin | ( C)DNA |
| (iv)phosphodiester linkage | (D)Zwitter ion |
| (v) Uracil | v |
(a) i-A, v- D, iii- C, iv-B
(b) i-D, ii-C, iii- A, iv-B
(c) i-D, v- D, iii- A, iv-B
(d) i-A, ii- C, iii- D, iv-B
(a)Nitrogen: 1`"s"^{2}` 2`"s"^{2}` 2`"p"^{3}` :: Argon:1`"s"^{2}` 2`"s"^{2}` 2`"p"^{6}`
(b)Carbon: maximum compounds :: Xenon: no compounds
(c) `"XeF"_{2}`: Linear :: `"ClF"_{3}`: Trigonal planar
(d)Helium: meteorological observations:: Argon: metallurgical processes
52. Complete the following analogy: Same molecular formula but different structures: A:: Non superimposable mirror images: B
(a) A:Isomers B: Enantiomer
(b) A: Enantiomers B: Racemic mixture
(c) A: Sterioisomers B: Retention
(d) A: IsomersB: Sterioisomers
CASE1: Read the passage given below and answer the following questions
Early crystallographers had trouble solving the structures of inorganic solids using X-ray diffraction because some of the mathematical tools for analyzing the data had not yet been developed. Once a trial structure was proposed, it was relatively easy to calculate the diffraction pattern, but it was difficult to go the other way (from the diffraction pattern to the structure) if nothing was known a priori about the arrangement of atoms in the unit cell. It was important to develop some guidelines for guessing the coordination numbers and bonding geometries of atoms in crystals. The first such rules were proposed by Linus Pauling, who considered how one might pack together oppositely charged spheres of different radii. Pauling proposed from geometric considerations that the quality of the "fit" depended on the radius ratio of the anion and the cation.
If the anion is considered as the packing atom in the crystal, then the smaller cation fills interstitial sites ("holes"). Cations will find arrangements in which they can contact the largest number of anions.
If the anion is considered as the packing atom in the crystal, then the smaller cation fills interstitial sites ("holes"). Cations will find arrangements in which they can contact the largest number of anions.
If the cation can touch all of its nearest neighbour anions then the fit is good. If the cation is too small for a given site, that coordination number will be unstable and it will prefer a lower coordination structure. The table below gives the ranges of cation/anion radius ratios that give the best fit for a given coordination geometry.
53. The radius of Ag+ ion is 126pm and of I- ion is 216pm. The coordination number of Ag+ ion is:
54. A solid AB has square planar structure. If the radius of cation A+ is 120pm, calculate the maximum possible value of anion B-
| Coordination number | Geometry | ρ = `r_{cation}`/ranion |
| 2 | linear | 0 – 0.155 |
| 3 | triangular | 0.155 – 0.225 |
| 4 | tetrahedral | 0.225 – 0.414 |
| 4 | square planar | 0.414 – 0.732 |
| 6 | octahedral | 0.414 – 0.732 |
| 8 | cubic | 0.732 – 1.0 |
| 12 | cuboctahedral | 1.0 |
(a)2
(b)3
(c)6
(d)8
54. A solid AB has square planar structure. If the radius of cation A+ is 120pm, calculate the maximum possible value of anion B-
(a)240 pm
(b)270 pm
(c)280 pm
(d)290 pm
(a) all of its nearest neighbour anions.
(b) most of its nearest neighbour anions.
(c) some of its nearest neighbour anions.
(d) none of its nearest neighbour anions.
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