Question

A gas A with another gas B in the presence of a catalyst C to give a colourless gas D. The gas
D when it comes in contact with air produces a brown gas E. The solution of A in water turns
red litmus blue.
i. Identify A, B, C, D, E.
ii. Write balanced chemical equation for the formation of D & E.
iii. What do you observe when gas A reacts with gas B in the absence of a catalyst.

Answer 1

$\huge\underline\mathbb\red{{♡ANSWER♡}}$

As the 'A' turns red litmus blue it is a base. Now the gas 'A' combines with 'B' in presence of Catalyst to give colorless gas Nitrogen monoxide. It reacts with oxygen to give brown gas which is Nitrogen dioxide.

A=NH

3

B=O

2

C=NO

D=NO

2

Reactions:

4NH

3

+5O

2

Pt

800

∘

C

4NO+6H

2

O+Heat

2NO+O2

→2NO2

NH3

in water forms NH4

OH which turns red litmus blue.