Carbonyl compounds can generally be converted to hydrocarbons by

Options

A. `H_(2)//Pt`
B. `LiAIH_(4)`
C. `N_(2)H_(4)-KOH`
D. `K_(2)Cr_(2)O_(7)-H_(2)SO_(4)`

Answer

To convert carbonyl compounds to hydrocarbons, we can follow these steps:

### Step 1: Understand the Structure of Carbonyl Compounds
Carbonyl compounds contain a carbon atom double-bonded to an oxygen atom (C=O). Examples include aldehydes and ketones.

**Hint:** Identify the functional group in carbonyl compounds, which is the C=O bond.

### Step 2: Identify the Reduction Process
To convert carbonyl compounds to hydrocarbons, we need a reduction reaction. This involves adding hydrogen or removing oxygen.

**Hint:** Remember that reduction typically involves the gain of electrons or hydrogen.

### Step 3: Choose the Correct Reducing Agent
Among the options provided, we need to find a reducing agent that can effectively convert carbonyl compounds to hydrocarbons. The options include:
- H2/Pt
- Lithium-aluminium hydride (LiAlH4)
- Hydrogen in the presence of KOH
- K2Cr2O7 in the presence of H2SO4

**Hint:** Look for a reducing agent that can fully reduce carbonyl compounds to hydrocarbons.

### Step 4: Analyze Each Option
1. **H2/Pt**: This is a catalytic hydrogenation, but it does not fully convert carbonyl compounds to hydrocarbons.
2. **Lithium-aluminium hydride (LiAlH4)**: This reduces carbonyl compounds to alcohols, not to hydrocarbons.
3. **Hydrogen in the presence of KOH**: This is a strong reducing environment that can convert carbonyl compounds to hydrocarbons.
4. **K2Cr2O7 in the presence of H2SO4**: This is an oxidizing agent and cannot reduce carbonyl compounds.

**Hint:** Eliminate options that do not lead to the formation of hydrocarbons.

### Step 5: Conclusion
The correct answer is that carbonyl compounds can generally be converted to hydrocarbons by hydrogen in the presence of KOH.

**Final Answer:** The correct option is C: Hydrogen in the presence of KOH.