In the Haber's process, the ratio of reactants nitrogen and hydrogen is:

1. 2 : 3
2. 3 : 2
3. 1 : 3
4. 3 : 1

When ammonia reacts with an excess of chlorine, the main product formed is:

1. NH₄Cl
2. NCl₃
3. Cl₂
4. HCl

In the following set up for burning ammonia in oxygen, ammonia tube is fitted higher and oxygen tube is kept lower because ?

P — Oxygen is lighter than ammonia.

Q — Ammonia is lighter than oxygen.

R — Ammonia and oxygen mixture is explosive and by keeping them in this position, limited oxygen will react with ammonia.

Which of the following is true ?

1. Only P
2. Only Q
3. Only R
4. Both P and Q

Assertion (A): Ammonia does not conduct electricity in gaseous or liquid state.

Reason (R): Ions in ammonia gas or liquid ammonia are not free to move.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true but R is false.
4. A is false but R is true.