The element that does not show catenation among the following p-block elements is ________.

(a)

Carbon

(b)

silicon

(c)

Lead

(d)

germanium

Oxidation state of carbon in its hydrides _______.

(a)

+4

(b)

-4

(c)

+3

(d)

+2

Which of the following is not sp² hybridised?

(a)

Graphite

(b)

graphene

(c)

Fullerene

(d)

dry ice

AlF₃ is soluble in HF only in the presence of KF. It is due to the formation of _________.

(a)

K₃[AIF₃H₃]

(b)

K₃[AiF₆]

(c)

AIH₃

(d)

K[AIF₃H]

The stability of +1 oxidation state increases in the sequence ________.

(a)

Al < Ga < In < Tl

(b)

Tl < In < Ga < Al

(c)

In < Tl < Ga < Al

(d)

Ga< In < Al < Tl

Give the uses of Borax

Write a note on Fisher tropsch synthesis.

Give the structure of CO and CO₂.

Describe the structure of diborane.

Give one example for each of the following
(i) icosogens
(ii) Tetragens
(iii) pnictogens
(iv) chalcogens

Write a note on metallic nature of p-block elements.

How will you identify borate radical?

A double salt which contains fourth period alkali metal (A) on heating at 500K gives (B). Aqueous solution of (B) gives white precipitate with BaCl₂ and gives a red colour compound with alizarin. Identify A and B.