| 1. | ![]() |
2. | ![]() |
| 3. | ![]() |
4. | ![]() |
| 1. | 3,1,2 | 2. | 2,3,1 |
| 3. | 1,3,2 | 4. | 2,1,3 |
| I: | ![]() |
IV: | ![]() |
| II: | ![]() |
V: | ![]() |
| III: | ![]() |

The compound that possesses the most acidic hydrogen atom, among the following, is:
| 1. | \(\mathrm{H}_3 \mathrm{C}-\mathrm{C} \equiv \mathrm{C}-\mathrm{H}\) |
| 2. | ![]() |
| 3. | ![]() |
| 4. | ![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
| I | II | III | IV | V |
Choose the correct ascending order of basicity of the given conjugate bases:
1. \(\mathrm {{RCOO}{^-}< HC\equiv C^- <^-NH_2<R^-}\)
2. \(\mathrm {{RCOO}{^-}< HC\equiv C^- <R^-<^-NH_2}\)
3. \(\mathrm {R^-< HC\equiv C^-<{RCOO}{^-}<^-NH_2}\)
4. \(\mathrm {{RCOO}{^-} <^-NH_2< HC\equiv C^-<R^-}\)