Gem-dibromide on hydrolysis will give:

Options

A. Glycols
B. Aldehydes or ketones
C. Alcohols
D. Epoxides

Answer

To solve the question "Gem-dibromide on hydrolysis will give:", we need to analyze the hydrolysis of geminal dibromides and determine the products formed.

### Step-by-Step Solution:

1. **Understanding Geminal Dibromides**:
- Geminal dibromides are compounds where two bromine atoms are attached to the same carbon atom. For example, 1,1-dibromoethane (C2H6Br2) is a geminal dibromide.

2. **Performing Hydrolysis**:
- Hydrolysis involves the reaction of the compound with water, often facilitated by a base like sodium hydroxide (NaOH). In this case, NaOH will act as a nucleophile.

3. **Nucleophilic Attack**:
- The carbon atom bonded to the two bromine atoms is electrophilic due to the high electronegativity of bromine, which creates a partial positive charge on the carbon.
- The hydroxide ion (OH-) from NaOH will attack this electrophilic carbon, displacing one bromine atom and forming a monohydroxy compound (C2H5Br(OH)).

4. **Formation of a Geminal Diol**:
- The remaining bromine atom can also be displaced by another hydroxide ion in a similar manner, leading to the formation of a geminal diol (C2H4(OH)2).

5. **Stability of Geminal Diol**:
- Geminal diols (compounds with two hydroxyl groups on the same carbon) are generally unstable. Therefore, they tend to dehydrate (lose a water molecule).

6. **Dehydration Reaction**:
- During dehydration, one of the hydroxyl groups and a hydrogen atom from the carbon will be eliminated as water. This results in the formation of an aldehyde or a ketone depending on the structure of the initial geminal dibromide.
- For example, from 1,1-dibromoethane, we would get acetaldehyde (CH3CHO) after dehydration.

7. **Conclusion**:
- The hydrolysis of geminal dibromides results in the formation of either an aldehyde or a ketone after the dehydration step. Thus, the final product of the hydrolysis of geminal dibromides is either an aldehyde or a ketone.

### Final Answer:
Gem-dibromide on hydrolysis will give either an aldehyde or a ketone.