Chemistry
Assertion (A): HCl gas fumes in moist air.
Reason (R): HCl gas is highly soluble.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Answer
Both A and R are true and R is the correct explanation of A.
Explanation— Hydrogen chloride (HCl) gas fumes in moist air because it is highly soluble in water. In the presence of moisture, HCl gas dissolves in water vapour in the air to form tiny droplets of hydrochloric acid, which appear as white fumes. So, both the assertion and the reason are true, and the reason correctly explains the assertion.
Related Questions
Assertion (A): The Fountain experiment is used to demonstrate the high solubility of HCl gas.
Reason (R): Red litmus solution turns blue in Fountain experiment.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion (A): HCl gas is collected by downward delivery.
Reason (R): HCl gas is heavier than air.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion (A): HCl gas dissolves in water as well as organic compounds like toluene.
Reason (R): HCl is a polar covalent compound.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion (A): HCl gas is used in the preparation of chlorine and chlorides.
Reason (R): Lead chloride is not produced from HCl.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.