Oxidation number of sulphur in Caro's acid is 

• +6

• +4

• +8

• +7

Liquor ammonia is

• ammonium hydroxide

• liquified ammonia gas

• concentrated solution of NH₃ in water

• a solution of NH₃ in alcohol

The correct structure of tribromooctaoxide is

The number of moles of hydrogen molecules required to produce 20 moles of ammonia through Haber's process is :

• 20

• 30

• 40

• 10

Which is the correct thermal stability order for H₂E (E = O, S, Se, Te and Po)?

• H₂O < H₂S < H₂Se < H₂Te < H₂Po

• H₂Po < H₂Te < H₂Se < H₂S < H₂S

• H₂Se < H₂Te <H₂Po < H₂O < H₂S

• H₂S < H₂O < H₂Se < H₂Te <H₂Po

Identify the incorrect statement related to PCl₅ from the following:

• Two axial P–Cl bonds make an angle of 180° with each other

• Axial P–Cl bonds are longer than equatorial P–Cl bonds

• PCl₅ molecules in non-reactive

• Three equatorial P–Cl bonds make an angle of 120° with each other

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

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

1339.

Match the following :

(a) Pure nitrogen	(i) Chlorine
(b) Haber process	(ii) Sulphuric acid
(c) Contact process	(iii) Ammonia
(d) Deacon’s process	(iv) Sodium azide or Barium azide

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)