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| 1. | \(\mathrm{HC\equiv C^-~Na^+}\) | 2. | ![]() |
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4. | \(\mathrm{C_4H_{10}}\) |

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| 1. | Aldehyde | 2. | Ketone |
| 3. | Ester | 4. | Carboxylic acid |
Which of the following reagents is used to synthesize the hemiketal of acetone?
1. HCl
2. CH₃OH
3. NaOH
4. HCHO