Q. No.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 |
1. H3O+ and H2F+, respectively.
2. OH– and H2F+, respectively.
3. H3O+ and F–, respectively.
4. OH– and F–, respectively.
Which of the following cannot act both as a Bronsted acid and as a Bronsted base?
| 1. | \(\mathrm{H C O_{3}^{-}}\) | 2. | \(\mathrm{NH_3}\) |
| 3. | \(\mathrm{HCl}\) | 4. | \(\mathrm{H S O_{4}^{-}}\) |
The species that can act as Bronsted acids as well as bases is/are:
1.
2.
3.
4. All of the above.
Acidity of BF3 can be explained on the basis of:
1. Arrhenius concept
2. Bronsted Lowry concept
3. Lewis concept
4. Bronsted Lowry as well as Lewis concept
The incorrect match among the following is:
a. HO– = Lewis base
b. F– = Lewis base
c. H+ = Lewis acid
d. BCl3 = Lewis base
1. Both a and b
2. Only b
3. Only d
4. Both a and d
1. \(\text{OH}^- \)
2. \(\text{NH}_3 \)
3. \(\text H_2 \text O \)
4. \(\text{BF}_3 \)
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. |
The correct match among the following is/are:
| Acid | Conjugate Base |
| a. HF | H2F– |
| b. H2SO4 | HSO4– |
| c. \(HCO_{3}^{-}\) | \(CO_{3}^{2-}\) |
| 1. | a, c | 2. | a, b |
| 3. | b, c | 4. | Only c is correct |
The conjugate acid-base pair is:
1. A pair that differs only by one proton
2. A pair that differs only by the size
3. A pair that differs only by electronegativity
4. None of the above
© 2026 GoodEd Technologies Pvt. Ltd.