Aieee 2009 Model Paper 2

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http://www.adichemadi.com AIEEE-2009 MODEL PAPER - 2 (CHEMISTRY) Note: This paper is not only for AIEEE (indeed more advanced) but equally useful for other competitive examinations like IIT-JEE, EAMCET, KCET, CSIR-NET, JAM, M.Sc CHEMISTRY entrance examinations of various universities and institutions.

The IUPAC name of the product formed during the alkaline hydrolysis of the following compound is

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1)

H3C

Cl

Cl

1) 1-[3-carboxycyclopentyl]-4-methylbenzene 2) 1-[3-(formyl)cyclopentyl]-4-methylbenzene 3) 3-(4-methylphenyl)cyclopentanecarbaldehyde 4) 3-(4-methylphenyl)cyclopentanecarboxylic acid 2)

Graphite is considered as the ultimate of fused benzene rings. On the same lines, which of the following can be considered as the ultimate of fused ‘inorganic benzene’ rings? 1) boran carbide 2) borazole 3) boron nitride 4) carborundum

3)

If either α-D-Glucose([ ]D = +111o ) or β-D-Glucose([ ]D = +19.2o ) is dissolved separately in water and allowed to stand, their specific rotations, [ ]D , gradually change and reach to a specific constant value +52.5o. Which of the following equilibrium best represents this mutarotation? OH

H

1)

H OH H

HO

OH

OH

H H H

OH

H

OH

HO H

OH

OH

OH

OH

OH

H

2) HO

H OH H

OH

HT 3)

H OH H

H

OH

H OH

OH

OH O OH H H H H OH OH

OH H

4) HO

H OH H

4)

OH OH

H

OH

OH

OH

O OH

HO H

H

OH

OH

H

O OH

HO

H H H

OH

H

OH

H

H OH H

O OH

HO

H H

OH

Following sequence of reactions occur during Mac Arthur Forrest process of extraction of

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silver from argentite ore. NaCN Ag 2 S   A  Na2 SO4 O2 Zn A   B  Ag 

Consider the following statements about ‘A’ and ‘B’. a) The geometries of the complexes ‘A’ and ‘B’ are respectively linear and square planar. b) The central metal ions in ‘A’ and ‘B’ exhibit ‘sp’ and ‘sp3’ hybridisations respectively. c) The IUPAC name of ‘A’ is Sodium dicyanoargentate(I) and that of ‘B’ is Sodium tetracyanozincate(II). d) Both ‘A’ and ‘B’ are paramagnetic and colorless substances.

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Choose the INCORRECT statment(s) 1) a & c 2) a, c & d

3) b & c

4) a & d

5)

When 2.0 mol O2(g) is heated at a constant pressure of 4.25 atm, its temperature increases from 260 K to 285 K. Given that the isobaric molar heat capacity of O2 is 29.4 J.K-1 mol-1, the change in the internal energy during the process will be 1) 1054 J.K-1 mol-1 2) 416 J.K-1 mol-1 3) 1470 J.K-1 mol-1 4) 1887 J.K-1 mol-1

6)

In the following reaction sequence, CH3

1) O3

conc. NaOD

A

products

2) H2O, Zn, 

the product mixture contains,

1) both

CH3 COOOH

and

D

COOH

and

HT

HO

CH3 COOH

HO

CH3 COO-

3) both

D

HO

CH3

2) both

CH3 COO-

OH H

and

CH3 COOH HO

CH3 COO-

4) only

OH H

7)

Consider the following reactions and their differential rate expressions.

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dx  k1[ X ] dt dy Y   products ;  k2 dt X   products ; -

These reactions are started with the 2 M solutions of ‘X’ and ‘Y’ each. It is found that their initial concentrations are halved in 5 minutes. The respective concentrations of ‘X’ and ‘Y’ after 10 minutes will be

8)

2) 0.5 M & 0.0 M 4) 0.125 M & 0.5 M

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1) 0.5 M & 0.5 M 3) 0.5 M & 0.25 M

The correct increasing order of the acidic strength of the following compounds is a) 3-Nitrophenol, b) 2-Nitrophenol, c) water, d) Ethyl alcohol, e) 2-Propanol, f) para cresol 1) e < d < f < a < b < c 3) e < d < c < f < b < a

9)

2) c < e < d < f < a < b 4) e < d < c < f < a < b

A beaker contains 100 mL of 0.02 M aqueous solution of methylamine. In first step, 50 mL of 0.02 M HCl solution is added to this and the pH of the resulting solution is found to be 10.6. In the next step, 50 mL of the 0.01 M H2SO4 solution is added to the beaker. The pH of final solution will be 1) 4.3 2) 9.7 3) 2.7 4) 11.3

10) As shown below, a graph of log x/m against log P values are plotted for adsorption of hydrogen gas over 2 gr of finely powdered nickel. ( where x = amount of adsorbate adsorbed, m = weight of adsorbent and P = equilibrium pressure). What is the amount of hydrogen adsorbed over nickel at 2 atm pressure?

1) 2 gr

2) 4 gr

3) 0.25 gr

4) 0.27 g

HT

11) Which among a) PHBV, b) Buna-S, c) Dacron, d) Neoprene, e) Nylon-6, are the condensation copolymers? 1) b,d & e 2) a,c & e 3) a & c 4) b,c & e 12) A 0.2 molar KCl solution is found to be isotonic with 3% glucose solution. The van’t Hoff factor of KCl solution is (the density of glucose solution is 1 g cm-3) 1) 1.334 2) 0.33 4 3) 1.667 4) 0.667 13) The reaction that occurs at anode of lead storage battery during its charging by external supply

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of electric current is 1) PbSO 4 (s) + 2e-   Pb(s) + SO 4 2- (aq) 2) 2PbSO 4 (s) + 2H 2O(l)   Pb(s) + PbO 2 (s) + 2H 2SO 4 (aq) 3) PbSO 4 (s) + 2H 2 O (l )   PbO 2 (s) + SO 4 2- (aq) + 4H + (aq) + 2e4) Pb(s) + SO 4 2- (aq)   PbSO 4 (s) + 2e 14) The major product formed during the following reaction is KOH

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Br

CH3

Alcohol, 

OH

1)

2)

CH3

CH3

OH

3)

4)

CH3

CH3

15) Choose the incorrect order for the given property. 1) NH3 < HF < CH3OH < H2O - Boiling points 2) H2O > H2S > H2Se > H2Te - Bond angle 3) Se2- < Br- < Rb+ < Sr2+ - Ionic radius 4) P < S < Ar < K - second ionization energy

16) Choose the incorrect statement about van der Waals’ equation of state,

 an 2  P    V  nb   nRT V2   1) The units of ‘a’ and ‘b’ are respectively, atm mol-2 lit2 and lit mol-1. 2) Higher is the value of ‘a’ for a given gas, easier is the liquifaction.

HT

 an 2  P   3)  V 2  is the experimentally determined pressure exerted by a real gas under given  conditions. 4) V  nb  is the actual volume available to ‘n’ moles of the gas. 1  H 2O (l ) is used in fuel cells to produce an electric 17) The reaction H 2 ( g )  O2 ( g )  2 current. Given the thermodynamic data: Molar entropies in J mol-1 K-1 for O2(g) =205; for H2(g)=130.6; for H2O(l) =70

and  f H o of H2O(l) = –285.9 kJ mol–1. What is the amount of electrical work the same reaction can perform in the fuel cell when carried out reversibly at 298 K. 1) -237.2 kJ mol-1 2) +285.9 kJ mol-1 3) +237.2 kJ mol-1 1) +2.859 kJ mol-1

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18) The number of S=S bonds in ‘X’ formed in the following reaction is 2 Na2 S2 O3  I 2   X  2 NaI

1) 2

2) 4

3) 0

4) 3

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19) The orbital which belongs to principal quantum level, n = 5 is

20) Aniline is heated with fuming sulfuric acid at 453-473 K and the final compound obtained is subjected to Lassaigne’s test. The coloration observed when the sodium extract obtained is tested with ferric chloride is 1) Prussian blue 2) Blood red 3) Purple 4) Yellow 21) Which of the compounds formed in the following reaction sequence gives positive iodoform test? 1)CH 3 MgBr KMnO4 1) CH 3 MgBr Ethanal   A   B  C 2) H O  2) H O  3

2) Only A

3

3) B and C

4) Only B

HT

1) A and B

22) The paramagnetic species with bond order 2.5 and containing one odd electron in the anti bonding orbital is 1) CN 2) NO 3) CO+ 4) C223) The radii of Ca2+ and F- ions respectively are 100 pm and 131 pm. The edge length of the unit cell in CaF2 is 1) 231 pm 2) 533.5 pm 3) 462 pm 4) 362.5 pm 24) 20 moles of HI containing 25% of I2 as impurity by moles is passed over hot gold catalyst. At

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equilibrium, 40% of HI is found to be dissociated. The Kp value for the following reaction is   H 2  I2 2HI   1) 0.815

2) 0.445

3) 2.4

4) 0.732

25) The major mono substituted product expected in the nitration of following compound is CH 3 H 3C

CH 3

Cl

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H 3C

1)

CH 3

CH 3

CH 3

H 3C

CH 3

NO 2

Cl

H 3C

CH3

2)

CH 3

CH 3

3)

O 2N

H 3C

4)

Cl

Cl

CH3

O 2N

Cl

NO 2

26) A metal ‘X’ is dissolved in conc.HCl and liberated hydrogen gas. The solution when diluted with excess of water, gives a white precipitate (Y). This precipitate (Y) dissolves in excess of alkali by giving (Z). The metal ‘X’ can also be dissoved in conc.NaOH by giving (Z) and liberating hydrogen gas. The metal cannot show oxidation number greater than +2. The metal may be 1) Al 2) Sn 3) Zn 4) All of the above. 27) Assertion(A): Europium can form stable Eu2+ ion besides Eu3+ ion. Reason(R): Oxidation states of lanthanoids with empty f-orbitals are also quite stable. 1) Both ‘A’ & ‘R’ are correct ; and ‘R’ is the correct explanation of ‘A’ 2) Both ‘A’ & ‘R’ are correct ; but ‘R’ is not the correct explanation of ‘A’. 3) ‘A’ is correct but ‘R’ is incorrect 4) ‘A’ is incorrect but ‘R’ is correct.

28) Two complexes ‘A’ and ‘B’ have the same formula CoCl3.3NH3. Aqueous solutions of both of them do not give any precipitate with AgNO3 solution. They have different melting points. Then ‘A’ and ‘B’ are 1) cis and trans isomers 2) Enantiomers 3) Diastereomers 4) meridional and facial isomers

HT

29) 1 L of a gaseous hydrocarbon burns completely in excess of oxygen and thus by giving 4 L each of carbondioxide and water vapour. (2R,3S)-Butane-2,3-diol is obtained when this hydrocarbon is treated with cold and alkaline KMnO4. The hydrocarbon is 1) 2-Methylprop-1-ene 2) But-1-ene 3) (2Z)-But-2-ene 4) (2E)-But-2-ene Directions: Question No. 30 and 31 are based on the following paragraph. The standard reduction potentials of F2, Cl2, Br2 & I2 for the single electrode Pt,X2(1 atm)/X(1 M) are respectively +2.87 V, +1.36 V, +1.065 V & +0.536 V. The halogen with higher reduction potential is stronger oxidising agent. Reduction potential of chlorine is less than that of fluorine eventhough its electron affinity is greater than that of fluorine. 30) An aqueous solution contains a mixture of fluoride, chloride and iodide salts of potassium.

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The ions observed immediately after excess of chlorine gas is bubbled through this solution under cold conditions are 1) K+, H+, F-, Cl- & ClO32) K+, H+, F- & OI3) K+, H+, F-, OCl- & Cl4) K+, H+, OCl- & F-

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31) Reduction potential of chlorine is less than that of fluorine. The best explanation for this observation is 1) Chlorine has less electronegativity than fluorine. 2) Enthalpy of hydration of choride ion is higher than that of fluoride ion. 3) Enthalpy of hydration of fluoride ion is higher than that of choride ion. 4) Bond enthalpy of chlorine is smaller than that of fluorine. 32) The number of isomers, with the formula C4H8, which can decolorize bromine/CCl4 in dark is 1) 5 2) 4 3) 3 4) 2 33) A solution of two liquids behaves ideally when

1) Hmixture  0 2) Smixture  0 3) Vmixture  0 4) Hmixture  0 34) Commonly used antiseptic, dettol is a mixture of 1) Furacine and Soframycin 2) Terpineol and Chloroxylenol 2) Saccharin and Bithionol 3) Sucrolose and Alitame 35) The major product formed in the following reaction is

H2

COCl

Pd, BaSO4

CHO

1)

2) 3)

CH2OH

CHO

HT

4)

CH2OH

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