Question

Statement-1: Ammonia at a pressure of 10 atm and $C{{O}_{2}}$ at a pressure of 20atm are introduced into an evacuated chamber. If Kp for the reaction
$N{{H}_{2}}COON{{H}_{4}}(s)\rightleftharpoons 2N{{H}_{3}}+C{{O}_{2}}(g)$ is 20 $at{{m}^{3}}$ , the total pressure after long time is less than 30atm.
Statement-2: Equilibrium can be obtained from both directions.
A. Statement-1 is true, statement-2 is true and statement-2 is the correct explanation for statement-1.
B. Statement-1 is true, statement-2 is true and statement-2 is NOT the correct explanation for the statement-1.
C. Statement-1 is true, statement-2 is false
D. Statement-1 is false, statement-2 is true

Answer 1

Hint: We know that the pressure in the chemical reaction is going to depend on the molecules which are in a gaseous state. The total pressure in the chemical reaction is going to get by the addition of the pressure of the gaseous molecules.

Complete step by step solution: - In the given question there are two statements and we have to find which option is correct by reading the statements.
Statement – 1: Ammonia at a pressure of 10 atm and $C{{O}_{2}}$ at a pressure of 20atm are introduced into an evacuated chamber. If Kp for the reaction
$N{{H}_{2}}COON{{H}_{4}}(s)\rightleftharpoons 2N{{H}_{3}}+C{{O}_{2}}(g)$ is 20 $at{{m}^{3}}$ , the total pressure after long time is less than 30atm.
The pressure exerted by the gaseous molecules ${{P}_{T}}={{P}_{N{{H}_{3}}}}+{{P}_{C{{O}_{2}}}}=10+20atm=30atm$
- In statement -1 it is given that the total pressure after a long time is less than 30atm but we got 30 atm, therefore the statement- 1 is incorrect.
- Coming to statement-2, Equilibrium can be obtained from both directions.
- The statement -2 is correct because in a chemical reaction equilibrium is going to be attained by both the directions we can get equilibrium by one direction.
- Therefore statement -1 is incorrect and statement-2 is correct.

So, the correct option is D.

Note: In any chemical reaction the pressure of the gaseous molecules will be the information about the total pressure of the chemical reaction and always the equilibrium of the chemical reaction is going to depend on both directions.