What is the correct electronic configuration of the central atom in K₄[Fe(CN)₆] based on crystal field theory

• ${\mathrm{t}}_{2\mathrm{g}}^6{\mathrm{e}}_{\mathrm{g}}^0$

• ${\mathrm{e}}^3{\mathrm{t}}_2^3$

• ${\mathrm{e}}^4{\mathrm{t}}_2^2$

• ${\mathrm{t}}_{2\mathrm{g}}^4 {\mathrm{e}}_{\mathrm{g}}^2$

A compound is formed by cation C and anion A. The anions form hexagonal close packed (hcp) lattice and the cations occupy 75% of octahedral voids. The formula of the compound is :

• C₃A₂

• C₃A₄

• C₄A₃

• C₂A₃

33.

Match the Xenon compounds in Column-I with its structure in Column-II and assign the correct code:

Column-I	Column- II
(a) XeF4	(i) Pyramidal
(b) XeF6	(ii) Square planar
(c) XeOF4	(iii) Distorted octahedral
(d) XeO3	(iv) Square pyramidal

Code:

• (a)  (b)  (c)  (d)
  (ii)  (iii)  (iv) (i)

• (a)  (b)  (c)  (d)
  (ii)  (iv)  (i) (iv)

• (a)  (b)  (c)  (d)
  (iii)  (iv)  (i) (ii)

• (a)  (b)  (c)  (d)
  (i)  (ii)  (iii) (iv)

Which of the following is incorrect statement?

• SiCl₄ is easily hydrolysed

• GeX₄  (X = F, Cl, Br, I) is more stable than GeX₂

• SnF₄ is ionic in nature

• PbF₄ is covalent in nature

Which mixture of the solutions will lead to the formation of negatively charged colloidal [Agl]l– sol ?

• 50 mL of 1 M AgNO₃ + 50 mL of 2 M KI

• 50 mL of 2 M AgNO₃ + 50 mL of 1.5 M KI

• 50 mL of 0.1M M AgNO₃ + 50 mL of 0.1 M KI

• 50 mL of 1 M AgNO₃ + 50 mL of 1.5 M KI

Match the following :

Which of the following is the correct option?

• (a) (b) (c) (d)
  (ii) (iv) (i) (iii)

• (a) (b) (c) (d)
  (iii) (iv) (ii) (i)

• (a) (b) (c) (d)
  (iv) (iii) (ii) (i)

• (a) (b) (c) (d)
  (i) (ii) (iii) (iv)

Which of the following species is not stable?

• [GeCl₆]^2-

• [Sn(OH)₆]^2-

• [SiCl₆]^2-

• [SiF₆]^2-

The structure of intermediate A in the following reaction, is

The non-essential amino acid among the following is:

• Leucine

• Alanine

• Lysine

• Valine

The biodegradable polymer is:

• Nylon-2-Nylon 6

• Nylon-6

• Buna-S

• Nylon-6,6