Catenation property of group 15 elements, follow the order _______.

(a)

N < P < As < Sb < Bi

(b)

P >> N > As > Sb > Bi

(c)

P < N < As < Sb < Bi

(d)

N>> P > As > Sb > Bi

Which is dibasic?

(a)

Orthophosphoric acid

(b)

Pyrophosphoric acid

(c)

Orthophosphorus acid

(d)

Hypophosphorus acid

Allotrope of sulphur which shows paramagnetic behaviour _______.

(a)

S₈- Rhombic

(b)

S₈- Monoclinic

(c)

S₂- In vapour phase

(d)

Not possible

Pick the wrong one among the following

(a)

F₂ - Yellow

(b)

Br₂ - Red

(c)

Cl₂ - Colourless

(d)

I₂- Violet

When Copper is heated with cone HNO₃ it produces

(a)

Cu (NO₃)₂ and N₂O

(b)

Cu (NO₃)₂ and NO₂

(c)

Cu (NO₃)₂ and NO

(d)

Cu (NO₃)₂ NO and N₂O