JEE Advanced 2007 · Paper 2

Consider a titration of potassium dichromate solution with acidified Mohr’s salt solution using diphenylamine as indicator. The number of moles of Mohr’s salt required per mole of dichromate is

1. A3
2. B4
3. C5
4. D6

Among the following metal carbonyls, the C–O bond order is lowest in

1. A[Mn(CO)₆]⁺
2. B[Fe(CO)₅]
3. C[Cr(CO)₆]
4. D[V(CO)₆]⁻

A solution of a metal ion when treated with KI gives a red precipitate which dissolves in excess KI to give a colourless solution. Moreover, the solution of metal ion on treatment with a solution of cobalt(II) thiocyanate gives rise to a deep blue crystalline precipitate. The metal ion is

1. APb²⁺
2. BHg²⁺
3. CCu²⁺
4. DCo²⁺

The number of stereoisomers obtained by bromination of trans-2-butene is

1. A1
2. B2
3. C3
4. D4

A positron is emitted from ²³₁₁Na. The ratio of the atomic mass and atomic number of the resulting nuclide is

1. A22/10
2. B22/11
3. C23/10
4. D23/12

For the process H₂O(l) (1 bar, 373 K) → H₂O(g) (1 bar, 373 K), the correct set of thermodynamic parameters is

1. AΔG = 0, ΔS = +ve
2. BΔG = 0, ΔS = −ve
3. CΔG = +ve, ΔS = 0
4. DΔG = −ve, ΔS = +ve

Consider a reaction aG + bH → Products. When concentration of both the reactants G and H is doubled, the rate increases by eight times. However, when concentration of G is doubled keeping the concentration of H fixed, the rate is doubled. The overall order of the reaction is

1. A0
2. B1
3. C2
4. D3

STATEMENT-1 : Alkali metals dissolve in liquid ammonia to give blue solutions. because STATEMENT-2 : Alkali metals in liquid ammonia give solvated species of the type [M(NH₃)ₙ]⁺ (M = alkali metals).

1. AStatement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1
2. BStatement-1 is True; Statement-2 is True; Statement-2 is NOT a correct explanation for Statement-1
3. CStatement-1 is True, Statement-2 is False
4. DStatement-1 is False, Statement-2 is True