JEE Advanced Exam 2010 Paper-I Chemistry Question Paper With Answer Key

Part – I : Chemistry

Section-I (Single Correct Choice Type)

This section contains 8 multiple choice questions each question has four choices (A), (B), (C) and (D) out of which ONLY ONE is correct.

1. The correct structure of ethylenediaminetetraacetic acid (EDTA) is

(A)  

(B) 

(C)  

(D) 

Ans : (C)

2. The ionization isomer of [Cr(H2O)4Cl(NO2)]Cl is

(A)  [Cr(H2O)4(O2N)]Cl2

(B)  [Cr(H2O)4Cl2] (NO2)

(C)  [Cr(H2O)4 Cl(ONO)]Cl

(D)  [Cr(H2O)4Cl2(NO2)] ∙ H2O

Ans : (B)

3. The synthesis of 3-octyne is achieved by adding a bromoalkane into a mixture of sodium amide and an alkyne. The bromoalkane and alkyne respectively are

(A)  BrCH2CH2CH2CH2CH3 and CH3CH2C ≡ CH

(B)  BrCH2CH2CH3 and CH3CH2CH2C ≡ CH

(C)  BrCH2CH2CH2CH2CH3 and CH3C ≡ CH

(D)  BrCH2 CH2CH2CH3 and CH3CH2C ≡ CH

Ans : (D)

4. The correct statement about the following disaccharide is

(A)  Ring (a) is pyranose with α-glycosidic link

(B)  Ring (a) is furanose with α-glycosidic link

(C)  Ring (b) is furanose with α-glycosidic link

(D)  Ring (b) is pyranose with β-glycosidic link

Ans : (A)

5. In the reaction the  products are

(A)  

(B)  

(C)  

(D)  

Ans : (D)

6. Plots showing the variation of the rate constant (k) with temperature (T) are given below. The plot that follows Arrhenius equation is

(A)  

(B)  

(C) 

(D)  

Ans : (A)

7. The species which by definition has ZERO standard molar enthalpy of formation at 298 K is

(A)  Br2(g)

(B)  Cl2(g)

(C)  H2O(g)

(D)  CH4(g)

Ans : (B)

8. The bond energy (in kcal mol1) of a C-C single bond in approximately

(A)  1

(B)  10

(C)  100

(D)  1000

Ans : (C)

Section-II (Multiple Correct Choice Type)

This section contains 5 multiple choice questions. Each question has four choices A), B), C) and D) out of which ONE OR MORE may be correct.

9. The reagent(s) used for softening the temporary hardness of water is(are)

(A)  Ca3(PO4)2

(B)  Ca(OH)2

(C)  Na2CO3

(D)  NaOCl

Ans : (B)

10. In the reaction  the intermediate(s) is(are)

(A)  

(B)  

(C) 

(D)  

Ans : (A, C)

11. In the Newman projection for 2, 2-dimethylbutane

X and Y can respectively be

(A)  H and H

(B)  H and C2H5

(C)  C2H5 and H

(D)  CH3 and CH3

Ans : (B, D)

12. Among the following, the intensive property is (properties are)

(A)  molar conductivity

(B)  electromotive force

(C)  resistance

(D)  heat capacity

Ans : (A, B)

13. Aqueous solutions of HNO3, KOH, CH3COOH, and CH3COONa of identical concentrations are provided. The pair(s) of solutions which form a buffer upon mixing is(are)

(A)  HNO3 and CH3COOH

(B)  KOH and CH3COONa

(C)  HNO3 and CH3COONa

(D)  CH3COOH and CH3COONa

Ans : (C, D)

Section-III (Paragraph Type)

Paragraph for Questions 14 to 16

This section contains 2 paragraphs. Based upon the first paragraph 2 multiple choice questions and based upon the second paragraph 3 multiple choice questions have to be answered. Each of these questions has four choices A), B), C) and D) out of WHICH ONLY ONE CORRECT.

Copper is the most noble of the first row transition metals and occurs in small deposits in several countries. Ores of copper include chalcanthite (CuSO4∙5H2O), atacamite (Cu2Cl(OH)3), cuprite (Cu2O), copper glance (Cu2S) and malachite (Cu2(OH)2CO3). However, 80% of the world copper production comes from the ore chalcopyrite (CuFeS2). The extraction of copper from chalcopyrite involves partial roasting, removal iron and self-reduction.

14. Partial roasting of chalcopyrite produces

(A)  Cu2S and FeO

(B)  Cu2O and FeO

(C)  CuS and Fe2O3

(D)  Cu2O and Fe2O3

Ans : (A)

15. Iron is removed from chalcopyrite as

(A)  FeO

(B)  FeS

(C)  Fe2O3

(D)  FeSiO3

Ans : (D)

16. In self-reduction, the reducing species is

(A)  S

(B)  O2

(C)  S2

(D)  SO2

Ans : (C)

Paragraph for Questions 17 to 18

The concentrate of potassium ions inside a biological cell is at least twenty times higher than the outside. The resulting potential difference across the cell is important balance. A simple model for such a concentration cell involving a metal M is

M(s)|M+(aq; 0.05 molar)||M+(aq; 1 molar)|M(s)

For the above electrolytic cell the magnitude of the cell potential |Ecell| = 70 mV.

17. For the above cell

(A)  Ecell > 0; ∆G > 0

(B)  Ecell > 0; ∆G < 0

(C)  Ecell < 0; ∆G° > 0

(D)  Ecell > 0; ∆G° < 0

Ans : (B)

18. If the 0.05 molar solution of M+ is replaced by a 0.0025 molar M+ solution, then the magnitude of the cell potential would be

(A)  35 mV

(B)  70 mV

(C)  140 mV

(D)  700 mV

Ans : (C)

Section-IV (Integer Type)

This section contains TEN questions. The answer to each question is a single digit integer ranging from 0 to 9.

19. The total number of basic groups in the following form of lysine is

Ans : (2)

20. The total number of cyclic isomers possible for a hydrocarbon with the molecular formula C4H6 is

Ans : (5)

21. In the scheme given below, the total number of intra molecular aldol condensation products formed from ‘Y’ is

Ans : (1)

22. Amongst the following, the total number of compounds soluble in aqueous NaoH is

Ans : (4)

23. Amongst the following the total number of compounds whose aqueous solution turns red litmus paper blue is

Ans : (3)

24. Based on VSEPR theory, the number of 90 degree F−Br−F angles in BrF5 is

Ans : (0 or 8)

25. The value of n in the molecular formula BenAl2Si6O18 is

Ans : (3)

26. A student performs a titration with different burettes and finds titre values of 25.2 mL, 25.25 mL, and 25.0 mL. The number of significant figures in the average titre value is

Ans : (3)

27. The concentration of R in the reaction R → P was measured as a function of time and the following data is obtained :

The order of the reaction is

Ans : (0)

28. The number of neutrons emitted when  undergoes controlled nuclear fission to  is

Ans : (4)

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