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2006 IITJEE PAPER - Chemistry

a )	Cis 1, 2, diol

b )	trans 1, 2 diol

c )

Borax

d )

Na₂HPO₄

a )

Zn(OH)₂

b )

Al(OH)₃

c )

Mg(OH)₂

d )

Ca(OH)₂

a )

SO² , CO²

b )

SO² , CO

c )

SO² , NO²

d )

SO² , SO²

a )

3/2 R

b )

4/2 R

c )

5/2 R

d )

zero

a )	(IV) > (III) > (II) > (I)

b )	(III) > (IV) > (II) > (I)

c )	(I) > (II) > (III) > (IV)

d )	(II) > (III) > (I) > (IV)

a )

b )

c )

d )

a )	Benzoyl chloride

b )	Benzene chloro ketone

c )	Benzene carbonyl chloride

d )	Chloro phenyl ketone

a )	1.08 x 10³

b )	1.08 x 10⁷

c )

6.8 x 10⁶

d )

6.8 x 10⁷

a )	CH₃ - C ≡ N

b )	CH₃ - NH - CH₃

c )

d )

a )	[Cu(CN)₄]^2-

b )	Cu²⁺ get reduced to form [Cu(CN)₄]^3-

c )

Cu(CN)₂

d )

CuCN

a )

+100 e.u

b )

+60 e.u

c )

-100 e.u

d )

-60 e.u

a )

The condition for equilibrium is
2ΔG_NH₃ = 3ΔG_H₂ + ΔG_N₂
where G is Gibbs free energy per mole of the gaseous species measured at that partial pressure. The condition of equilibrium is unaffected by the use of catalyst, which increases the rate of both the forward and backward reactions to the same extent.

b )	The equilibrium will shift to forward direction because according to 2^nd law of thermodynamics the entropy must increases in the direction of spontaneous reaction.

c )	Catalyst will not alter the rate of either of the reaction.

d )	Catalyst at 298 K doesn't affect reaction rate as it increase, the forward and backward reaction by 2 and catalyst at 443 K increase reaction rate in the forward direction by 2 and backward direction by 1.7

a )

1.158 Å

b )

1.128 Å

c )

1.178 Å

d )

1.118 Å

a )	CO₂ , H₂CO₃ , HCO^-₃ , CO^2-₃

b )	H₂CO₃ , CO^2-₃

c )	CO^2-₃ , HCO^-₃

d )	CO₂ , H₂CO₃

a )

b )

c )

d )

a )

b )

c )

d )

a )	For the gas A, a = 0 and its dependence on P is linear at all pressure

b )	For the gas B, b = 0 and its dependence on P is linear at all pressure.

c )	For the gas C, which is typical real gas for which neither a nor b = 0. By knowing the minima and the point of intersection, with Z = 1, a and b can be calculated.

d )	At high pressure, the slope is positive for all real gases.

a )	Two different oximes are formed

b )	Three different oximes are formed

c )	Two oximes are optically active

d )	All oximes are optically active

a )

6,6

b )

3,3

c )

4,4

d )

6,4

a )	MgSO₄ . MgPO₄

b )

Mg₃(PO₃)₂

c )

MgNH₄PO₄

d )	MgSO₄ . MgCl₂

a )	Potassium tetracyanonickelate (II), potassium tetrachloronickelate (II)

b )	Tetracyanopotassiumnickelate (II), teterachlorpotassiumnickelate (II)

c )	Tetracyanornickel (II), tetrachloronickel (II)

d )	Potassium tetracyanonickel (II), potassium tetrachloronickel (II)

a )	Complex (A) is paramagnetic and complex (B) is diamagnetic

b )	Complex (A) is diamagnetic and complex (B) is paramagnetic

c )	Complex (A) with cyano is paramagnetic with two unpaired electrons and complex (B) is diamagnetic

d )	Complex (A) with cyano is diamagnetic and complex (B) with chloro is paramagnetic with two unpaired electrons.

a )	both are dsp²

b )	both are sp³

c )	complex(A):dsp² and complex(B): sp³

d )	complex(A): sp³ and complex(B): dsp²

a )	Br₂ / NaOH

b )	Kbr / NaOH

c )	KBr / NaHCO₃

d )	N-Bromo succinamide

a )	Formation of (i)

b )	Formation of (ii)

c )	Formation of (iii)

d )	Formation of (vi)

a )

b )

c )

d )

27) Section-C (Comprehension-3)
Due to the neutron prsent in cosmic rays, the following reaction takes place by the bombardment of nitrogen with neutrons
₇N¹⁴ + ₀n¹ → ₆H¹⁴ + ₁H¹ ;
₆C¹⁴ → β^-
Cosmic rays from ₆C¹⁴ which get circulated in the atmosphere as well as in living species. Whenever there is a nuclear explosion , the concentration of ₆C¹⁴ increases. both in the atmosphere as well as in living species. When a species dies the C-14 concentration decreases and hence the decrease can be measured and the time estimated as to when the organism died. For this we require
(1) half life of ₆C¹⁴ (i.e. 5760 years).
(2) Activity of ₆C¹⁴ in living species.
(3) Activity of ₆C¹⁴ in fossil.
Beyond 30000 years the age of fossil cannot be determined as the activity then would be too low.

In radio carbon dating for finding the age of fossils , the most appropriate statement is

a )	In living organisms, circulation of C-14 from atmosphere is high so the carbon content is constant in organism

b )	Carbon dating can be used to find out the age of earth crust and rocks

c )	Radioactive absorption due to cosmic radiation is equal to the rate of radioactive decay, hence the carbon content remains constant in living organism

d )	Carbon dating can not be used to determine concentration of C-14 in dead beings.

28) Section-C (Comprehension-3)
Due to the neutron prsent in cosmic rays, the following reaction takes place by the bombardment of nitrogen with neutrons
₇N¹⁴ + ₀n¹ → ₆H¹⁴ + ₁H¹ ;
₆C¹⁴ → β^-
Cosmic rays from ₆C¹⁴ which get circulated in the atmosphere as well as in living species. Whenever there is a nuclear explosion , the concentration of ₆C¹⁴ increases. both in the atmosphere as well as in living species. When a species dies the C-14 concentration decreases and hence the decrease can be measured and the time estimated as to when the organism died. For this we require
(1) half life of ₆C¹⁴ (i.e. 5760 years).
(2) Activity of ₆C¹⁴ in living species.
(3) Activity of ₆C¹⁴ in fossil.
Beyond 30000 years the age of fossil cannot be determined as the activity then would be too low.

What should be the age of fossil for meaningful determination of its age?

a )

6 years

b )	6000 years

c )	60,000 years

d )	It can be used to calculate any age

29) Section-C (Comprehension-3)
Due to the neutron prsent in cosmic rays, the following reaction takes place by the bombardment of nitrogen with neutrons
₇N¹⁴ + ₀n¹ → ₆H¹⁴ + ₁H¹ ;
₆C¹⁴ → β^-
Cosmic rays from ₆C¹⁴ which get circulated in the atmosphere as well as in living species. Whenever there is a nuclear explosion , the concentration of ₆C¹⁴ increases. both in the atmosphere as well as in living species. When a species dies the C-14 concentration decreases and hence the decrease can be measured and the time estimated as to when the organism died. For this we require
(1) half life of ₆C¹⁴ (i.e. 5760 years).
(2) Activity of ₆C¹⁴ in living species.
(3) Activity of ₆C¹⁴ in fossil.
Beyond 30000 years the age of fossil cannot be determined as the activity then would be too low.

A nuclear explosion has taken place leading to increase in concentration of C14 in nearby areas. C14 concentration is C1 in nearby areas and C2 in areas far away. If the age of the fossil is determined to be T1 and T2 at the places respectively then

a )

The age of the fossil will increase at the place where explosion has taken place and

T₁-T₂ =	1	ln	C₁
	λ		C₂

b )

The age of the fossil will decrease at the place where explosion has taken place and

T₁-T₂ =	1	ln	C₁
	λ		C₂

c )	The age of fossil will be determined to be same

d )

T₁	=	C₁
T₂	=	C₂

30) (Comprehension-4)
Tollen's reagent is used for the detection of aldehyde when a solution of AgNO₃ is added to glucose with NH₄OH then gluconic acid is formed
Ag⁺ + e^- → Ag; E°_red = 0.8 V
C₆H₁₂O₆ + H₂O → Gluconic acid ( C₆H₁₂O₇ ) + 2H⁺ + 2e^- ; E°_oxd = -0.05 V
Ag(NH₃)₂⁺ + e^- → Ag(s) + 2NH₃ ; E°_red = 0.337 V

[ Use 2.303 x	R T	= 0.0592 and	F	= 38.92 at 298 K ]
	F		R T

2Ag⁺ + C₆H₁₂O₆ + H₂O → 2Ag(s) + C₆H₁₂O₇
Calculate lnK for of this reaction.

a )

66.13

b )

58.38

c )

28.30

d )

46.29

31) (Comprehension-4)
Tollen's reagent is used for the detection of aldehyde when a solution of AgNO₃ is added to glucose with NH₄OH then gluconic acid is formed
Ag⁺ + e^- → Ag; E°_red = 0.8 V
C₆H₁₂O₆ + H₂O → Gluconic acid ( C₆H₁₂O₇ ) + 2H⁺ + 2e^- ; E°_oxd = -0.05 V
Ag(NH₃)₂⁺ + e^- → Ag(s) + 2NH₃ ; E°_red = 0.337 V

[ Use 2.303 x	R T	= 0.0592 and	F	= 38.92 at 298 K ]
	F		R T

When ammonia is added to the solution, pH is raised to 11. Which half-cell reaction is affected by pH and by how much?

a )	E_oxd will increase by a factor of 0.65 from E°_oxd

b )	E_oxd will decrease by a factor of 0.65 from E°_oxd

c )	E_red will increase by a factor of 0.65 from E°_red

d )	E_red will decrease by a factor of 0.65 from E°_red

32) (Comprehension-4)
Tollen's reagent is used for the detection of aldehyde when a solution of AgNO₃ is added to glucose with NH₄OH then gluconic acid is formed
Ag⁺ + e^- → Ag; E°_red = 0.8 V
C₆H₁₂O₆ + H₂O → Gluconic acid ( C₆H₁₂O₇ ) + 2H⁺ + 2e^- ; E°_oxd = -0.05 V
Ag(NH₃)₂⁺ + e^- → Ag(s) + 2NH₃ ; E°_red = 0.337 V

[ Use 2.303 x	R T	= 0.0592 and	F	= 38.92 at 298 K ]
	F		R T

Ammonia is always is added in this reaction. Which of the following must be incorrect?

a )	NH₃ combines with Ag⁺ to form a complex.

b )	Ag(NH₃)₂⁺ is a stronger oxidising reagent than Ag⁺ .

c )	In absence of NH₃ silver salt of gluconic acid is formed.

d )	NH₃ has affected the standard reduction potential of glucose/gluconic acid electrode.

a )

b )

c )

d )

a )

b )

c )

d )

a )

b )

c )

d )

a )

b )

c )

d )

a )

b )

c )

d )

a )

b )

c )

d )

a )

b )

c )

d )

a )

b )

c )

d )

Final result and score
Q No	Ans	Correct Ans	Score	Q No	Ans	Correct Ans	Score
1	-		0	2	-		0
3	-		0	4	-		0
5	-		0	6	-		0
7	-		0	8	-		0
9	-		0	10	-		0
11	-		0	12	-		0
13	-		0	14	-		0
15	-		0	16	-		0
17	-		0	18	-		0
19	-		0	20	-		0
21	-		0	22	-		0
23	-		0	24	-		0
25	-		0	26	-		0
27	-		0	28	-		0
29	-		0	30	-		0
31	-		0	32	-		0
33	-		0	34	-		0
35	-		0	36	-		0
37	-		0	38	-		0
39	-		0	40	-		0
Final score : 0

Answer sheet
Q No	Ans	For review	Q No	Ans	For review
1			2
3			4
5			6
7			8
9			10
11			12
13			14
15			16
17			18
19			20
21			22
23			24
25			26
27			28
29			30
31			32
33			34
35			36
37			38
39			40