Q. No.
The addition of NH₄Cl to an aqueous solution of NH₄OH introduces a common ion (NH₄⁺). What is the effect on the pH of the solution?
| 1. | The pH increases | 2. | The pH decreases |
| 3. | Remain the same | 4. | Either increase or decrease |
| Assertion (A): | A catalyst does not influence the values of the equilibrium constant. |
| Reason (R): | The catalyst affects the rate of both forward and reverse reactions equally. |
| 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. | Both (A) and (R) are false. |
| Assertion (A): | The reaction for which ∆n=0 there is no effect of pressure on equilibrium. |
| Reason (R): | A change in pressure results in no change in the value of the equilibrium constant. |
| 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. | Both (A) and (R) are false. |
| Assertion (A): | For a reaction, the concentration quotient (Q) is equal to K when the reaction is in equilibrium. |
| Reason (R): | If a catalyst is added to the reaction at equilibrium, the value of Q remains unchanged and is no longer equal to K. |
| 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. | Both (A) and (R) are false. |
Assertion: The equilibrium constant of a reaction changes by changing the stoichiometric coefficients of the reaction.
Reason: The reaction,
and have the same equilibrium constant.
1. Both assertion & reason are true and the reason is the correct explanation of the assertion.
2. Both assertion & reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is a true statement but the reason is false.
4. Both assertion and reason are false statements.
| Assertion (A): | The aqueous solution of \(CH_3COONa\) is alkaline in nature. |
| Reason (R): | Sodium acetate undergoes cationic hydrolysis. |
| 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. | Both (A) and (R) are False. |
Assertion: At equilibrium,
Reason: When \(K_c> Q_c\), the reaction mainly goes in the forward direction.
| 1. | Both assertion & reason are true and the reason is the correct explanation of the assertion. |
| 2. | Both assertion & reason are true but the reason is not the correct explanation of the assertion. |
| 3. | Assertion is a true statement but the reason is false. |
| 4. | Both assertion and reason are false statements. |
Given below are two statements:
| Assertion (A): | H - acts as both Bronsted Lowry base as well as Lewis base. |
| Reason (R): | It acts as both H ⊕ acceptor and a lone pair donor. |
| 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. | Both (A) and (R) are False. |
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