21.

The crystal field stabilization energy (CFSE) of [Fe(H₂O)₆]Cl₂ and K₂[NiCl₄], respectively are:

• -2.4 Δ₀ and -1.2Δ_t

• -0.4 Δ₀ and -1.2Δ_t

• -0.6 Δ₀ and -0.8Δ_t

• -0.4 Δ₀ and -0.8Δ_t

1 g of a non-volatile non – electrolyte solute is dissolved in 100 g of two different solvents A and B whose ebulliscopic constants are in the ratio of 1:5. The ratio of the elevation in their boiling points, $\frac{∆{\mathrm{T}}_{\mathrm{b}}\left(\mathrm{A}\right)}{∆{\mathrm{T}}_{\mathrm{b}}\left(\mathrm{B}\right)}$ is:

• 1:0.2

• 10: 1

• 5: 1

• 1: 5

The correct order of the first ionization enthalpies is :

• Ti < Mn < Ni < Zn

• Mn < Ti < Zn < Ni

• Ti < Mn < Zn < Ni

• Zn < Ni < Mn < Ti

The number of pentagons in C₆₀ and trigons (triangles ) in white phosphours, respectively ,are :

• 20 and 4

• 20 and 3

• 12 and 4

• 12 and 3

For the reaction of H₂ with I₂, the rate constant is 2.5 × 10^-4 dm³ mol^-1s^-1 at 327°C and 1.0 dm³ mol^-1s^-1 at 527°C. The activation energy for the reaction, in kJ mol^-1 is: (R= 8.314 Jk^-1mol^-1)

• 166

• 150

• 59

• 72

The correct statement is :

• Zincite is a carbonate ore.

• Zone refining process is used for the refining of titanium

• Aniline is a for the stabilizer

• Sodium cyanide cannot be used in the metallurgy of silver

The highest possible oxidation states of uranium plutonium , respectively are

• 6 and 7

• 7 and 6

• 4 and 6

• 6 and 4

The major product ‘Y’ in the following reaction is :

Compound A(C₉H₁₀O) shows positive iodoform rest. Oxidation of A with KMnO₄/ KOH gives B(C₈H₆O₄). Anhydride of B is used for the preparation of phenolpthalein. Compound A is:

Which of the following is NOT a correct method if the preparation of benzylamine from cyanobenzene ?

• H₂/ Ni

• (i) LiAlH₄

  (ii) H₃O⁺

• (i) SnCl₂ + HCl(gas)

  (ii) NaBH₄

• (i) HCl/H₂O 

  (ii) NaBH₄