IIT JEE Chemistry-1995

IITJEE –Past papers: 

IITJEE –Past papers PHYSICS - UNSOLVED PAPER - 1995

SECTION – I: 

SECTION – I Single Correct Answer Type In each of the following questions, one choice is correct, Choose the correct answer.

Problem: 

01 Which of the following gas molecules has the longest mean-free path? a.H 2 b.N 2 c. O 2 d.Cl 2 Problem

Problem: 

Problem 02 A 3p-orbital has: two non-spherical nodes two spherical nodes one spherical and one non-spherical nodes one spherical and two non-spherical nodes

Problem: 

Problem 03 Which of the following salts is most acidic in water? NiCl 2 FeCl 2 AlCl 3 BeCl 2

Problem: 

Problem 04 An electrician’s solder is an alloy of: Cu and pb Zn and Cu Sn and pb Fe and Zn

Problem: 

Problem 05 For which of the following reactions is not equal to ? a. b. c. d.

Problem: 

Problem 06 An aqueous solution contains the following ions: .The addition of dil. HCl (6N)precipitates a. b. c. d.

Problem: 

Problem 07 The number of electrons that are paired in oxygen molecule is: 7 8 16 14

Problem: 

08 Problem Which one of the following pairs of substances when mixed produces chlorine gas at room temperature? a. b. c. d.

Problem: 

Problem 09 CsBr crstal has BCC structure.It has an edge legth of 4.3 Å . Theshortest interionic distance between ions is: 3.72 Å 1.86 Å 7.44 Å 4.3 Å

Problem: 

Problem 10 Which of the following anions is not easily removed from aqueous solutions by precipition ? a. b. c. d.

Problem: 

Problem 11 The element exhibiting most stable +2oxidation state from among the following is: Sn pb Fe Ag

Problem: 

12 Sodium nitroprusside when added to an alkaline solution of sulphide ions produces purple colouration due to the formation of a. b. c. d. Problem

Problem: 

Problem 13 Which one of the following oxides is ionic? a. P 2 O 2 b. CrO 3 c. MnO d. Mn 2 O 7

Problem: 

Problem 14 What is the chief product obtained when n-butane is treated with bromine in the presence of light at a. b. c. d.

Problem: 

Problem 15 When isobutyl magnesium bromide in dry ether is treated with absolute ethly alcohol, the products formed are: a. b. c. d.

Problem: 

Problem 16 The following compound can exhibit: geometrical isomerism geometrical and optical isomerism's optical isomerism tautomerism

Problem: 

17 The products formed in the following reaction are: a. b. c. d. Problem

Problem: 

Problem 18 Which of the following species is most stable? a. b. c. d.

Problem: 

Problem 19 The predominant product formed when 3- methyl-2-pentene reacts with HOCl is: a. b. c. d.

Problem: 

Problem 20 Allyl isocyanides has: 9 sigma bonds and 4 pi bonds 9 sigma bonds,3 pi bonds and 2 non-bonding electrons 8 sigma bonds and 5 pi bonds 8 sigma bonds,3pi bonds and 4 non-bonding electrons

Problem: 

Problem 21 ion is not stable in aqueous solution because of disproportionate reaction. value for disproportionate of is: -019 V -0.38 V 0.94 V 0.38 V

Problem: 

Problem 22 Concentrated cannot be used to prepare HBr from NaBr because it: reacts slowly with NaBr oxidises HBr reduces HBr disproportionate HBr

Problem: 

Problem 23 The dissociation of water at is 1.9x10-7 per cent and the density of water is 1.0g/cm. The ionization constant of water is: 3.42x10 -6 3.42x10 -8 1.00x10 -14 2.00x10 -16

Problem: 

Problem 24 A 0.2 molal aqueous solution of a weak acid (HX)is 20 per cent ionized. The freezing point of this solution is: a. b. c. d.

Problem: 

Problem 25 The vander Waals constant “a” is a correction factor to the ideal gas law for the intermolecular attractions within a substance. List 1 contains the substances and List 2 contains values of “a” . List 1 List 2 i ) C 6 H 6 (g) A)0.217 ii) C 6 H 5 CH 3 (g) B)5.464 iii) Ne(g) C)18.000 H 2 O(g) D)24.060 Which one of the following combinations represents the correct matching of the substance with the corresponding “a” value? i -A, ii-D, iii-C, iv-B i -D, ii-A, iii-B, iv-C

Slide 28: 

c. i -C, ii-D, iii-A, iv-B d. i - B,ii -C, iii-A, iv –D

Problem: 

Problem 26 The number of oxygen attached to each phosphorus in P 4 O 10 is 3 2 4 2.5

Problem: 

Problem 27 The locus of a variable point whose distance from (-2,0)is 2/3 times its distance from the line is ellipse parabola hyperbola none of these

Problem: 

Problem 28 What is/are the product/s formed when an equimolar mixture of benzaldehyde and formaldehyde is heated with concentrated NaOH ? a. b. c. d.

Problem: 

Problem 29 What is the decreasing order of reactivity amongst the following compounds towards aromatic electronphillc substitution? chlorobenzene benzene anilinium chloride toluene I II III IV II > I > III > IV III > I >II > IV IV > II >I > III I > II> III> IV

Problem: 

Problem 30 What are the organic products formed in the following reaction? a. b. c. d.

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