Chemistry
Assertion (A): Glass rod dipped in NH4OH gives dense white fumes with HCl gas.
Reason (R): HCI gas is acidic in nature.
- 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.
Practical Chemistry
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Answer
Both A and R are true but R is not the correct explanation of A.
Explanation — When a glass rod is dipped in ammonia solution and brought near the gas, dence white fumes of ammonium chloride are formed. Hence, the assertion (A) is true.
NH3 (aq) + HCl ⟶ NH4Cl
Hydrochloric acid (HCl) is strongly acidic in nature. Hence, the reason (R) is true.
Reason (R) doesn't explain assertion because the formation of white fumes is specifically due to the reaction between NH3 and HCl forming NH4Cl, not merely because HCl is acidic. Hence, the reason (R) is not the correct explanation of assertion (A).
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