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Q. No.Match the following equilibria with the corresponding condition.
| A. | Liquid ⇌ Vapour | I. | Saturated solution |
| B. | Solid ⇌ Liquid | II. | Boiling point |
| C. | Solid ⇌ Vapour | III. | Sublimation point |
| D. | Solute (s) ⇌ Solute (solution) | IV. | Melting point |
| V | Unsaturated solution |
Codes:
| A | B | C | D | |
| 1. | II | IV | III | I |
| 2. | I | II | III | V |
| 3. | V | IV | III | II |
| 4. | IV | V | III | II |
Subtopic: Introduction To Equilibrium |
90%
Level 1: 80%+
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Some reactions are written below in Column I and their equilibrium constants in terms of Kc are written in Column II.
Match the following reactions with the corresponding equilibrium constant:
Match the following reactions with the corresponding equilibrium constant:
| Column-I (Reaction) | Column-II (Equilibrium constant) | ||
| A. | (i) | ||
| B. | (ii) | ||
| C. | (iii) | ||
| (iv) |
Codes:
| A | B | C | |
| 1. | (iv) | (iii) | (ii) |
| 2. | (i) | (ii) | (iii) |
| 3. | (i) | (iv) | (iii) |
| 4. | (iv) | (i) | (iii) |
Subtopic: Kp, Kc & Factors Affecting them |
81%
Level 1: 80%+
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Match the standard free energy of the reaction with the corresponding equilibrium constant:
| A | \(\Delta \mathrm{G}^{\ominus}>0\) | (a) | K>1 |
| B | \(\Delta \mathrm{G}^{\ominus}<0\) | (b) | K=1 |
| C | \(\Delta \mathrm{G}^{\ominus}=0\) | (c) | K=0 |
| (d) | K<1 |
Codes:
| A | B | C | |
| 1. | (d) | (a) | (b) |
| 2. | (a) | (b) | (c) |
| 3. | (b) | (d) | (c) |
| 4. | (d) | (a) | (c) |
Subtopic: Kp, Kc & Factors Affecting them |
68%
Level 2: 60%+
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Match the following species with the corresponding conjugate acid:
| Species | Conjugate acid |
| A. | 1. |
| B. | 2. |
| C. | 3. |
| D. | 4. |
| 5. |
Codes
| A | B | C | D | |
| 1. | 2 | 5 | 1 | 5 |
| 2. | 2 | 4 | 3 | 5 |
| 3. | 5 | 4 | 3 | 2 |
| 4. | 4 | 5 | 3 | 2 |
Subtopic: Acids & Bases - Definitions & Classification |
95%
Level 1: 80%+
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Match Column-I with Column-II and mark the appropriate option:
|
Column-I (Term) |
Column-II (Conditions) |
||
| (A) |
Equilibrium |
(i) | |
| (B) |
Spontaneous reaction |
(ii) | |
| (C) |
Non-spontaneous reaction |
(iii) |
Codes:
| Options: | A | B | C |
| 1. | (ii) | (iii) | (i) |
| 2. | (i) | (ii) | (iii) |
| 3. | (ii) | (i) | (iii) |
| 4. | (iii) | (i) | (ii) |
Subtopic: Kp, Kc & Factors Affecting them |
83%
Level 1: 80%+
Hints
Given below are two statements:
| Assertion (A): | The increasing order or acidity of hydrogen halides is HF<HCI<HBr<HI. |
| Reason (R): | While comparing acids formed by the elements belonging to the same group of the periodic table, H-A bond strength is a more important factor in determining the acidity of an acid than the polar nature of the bond. |
| 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. |
Subtopic: Acids & Bases - Definitions & Classification |
83%
Level 1: 80%+
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Given below are two statements:
| Assertion (A): | A solution containing a mixture of acetic acid and sodium acetate maintains a constant value of pH on the addition of small amounts of acid or alkali. |
| Reason (R): | A solution containing a mixture of acetic acid and sodium acetate acts as a buffer solution. |
| 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. |
Subtopic: Buffer |
91%
Level 1: 80%+
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Given below are two statements:
| Assertion (A): | The ionisation of hydrogen sulphide in water is low in the presence of hydrochloric acid. |
| Reason (R): | Hydrogen sulphide is a weak acid. |
| 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. |
Subtopic: Common Ion Effect |
55%
Level 3: 35%-60%
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| Assertion (A): | For any chemical reaction at a particular temperature, the equilibrium constant is fixed and is a characteristic property. |
| Reason (R): | Equilibrium constant is independent of temperature. |
| 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. |
Subtopic: Kp, Kc & Factors Affecting them |
87%
Level 1: 80%+
Hints
Given below are two statements:
| Assertion (A): | An aqueous solution of ammonium carbonate is basic. |
| Reason (R): |
The acidic or basic nature of a salt solution of a salt of a weak acid and a weak base depends on the Ka and Kb values of the acid and the base forming it. |
| 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. |
Subtopic: pH calculation |
62%
Level 2: 60%+
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