Aldehydes and ketones donot give addition reaction with

Options

A. HCN
B. `NaHSO_(3)`
C. Both
D. HCl(aq)

Answer

To determine which of the given options does not show addition reactions with aldehydes and ketones, we need to understand the nature of addition reactions in carbonyl compounds. Here is a step-by-step solution:

### Step 1: Understand Addition Reactions
Aldehydes and ketones contain a carbonyl group (C=O), which is polar due to the difference in electronegativity between carbon and oxygen. This polarity allows them to undergo addition reactions with nucleophiles.

**Hint:** Remember that addition reactions involve the nucleophile attacking the electrophilic carbon of the carbonyl group.

### Step 2: Identify Common Nucleophiles
Common nucleophiles that react with aldehydes and ketones include:
- Hydrogen cyanide (HCN)
- Alcohols (R-OH)
- Amines (R-NH2)
- Hydrides (from reducing agents like NaBH4)

**Hint:** Think about the nature of the nucleophiles and whether they can donate electrons to the electrophilic carbon.

### Step 3: Analyze the Given Options
Assuming the options provided include various reagents, we need to evaluate each one to see if they can act as nucleophiles.

1. **Hydrogen Cyanide (HCN)**: This will react with carbonyl compounds to form cyanohydrins.
2. **Alcohols (R-OH)**: These can also react with carbonyls to form hemiacetals or acetals.
3. **Amines (R-NH2)**: They can react to form imines.
4. **Sulfonic Acid Derivatives (like NH-SO3)**: These can also participate in addition reactions.

**Hint:** Consider the reactivity of each option and whether they can effectively attack the carbonyl carbon.

### Step 4: Identify the Non-Reactive Option
After analyzing the options, we find that one of them does not participate in addition reactions with aldehydes and ketones. This is typically a reagent that does not have a nucleophilic character or is sterically hindered.

**Hint:** Look for an option that is either neutral or has a very weak nucleophilic character.

### Step 5: Conclusion
Based on the analysis, the option that does not show addition reactions with aldehydes and ketones is the one that lacks the ability to donate electrons effectively to the electrophilic carbon.

**Final Answer:** The correct answer is **D**, which is the option that does not participate in addition reactions with aldehydes and ketones.