Formaldehyde reacts with excess of ammonia to give

Options

A. `CH_2=NH`
B.
C.
D. Hexamethylenetetramine

Answer

To solve the question of what formaldehyde reacts with excess ammonia to give, we can follow these steps:

### Step 1: Identify the Reactants
Formaldehyde (CH₂O) is the first reactant, and ammonia (NH₃) is the second reactant.

### Step 2: Understand the Reaction
When formaldehyde reacts with ammonia, it can undergo a condensation reaction. In the presence of excess ammonia, formaldehyde can form a complex compound.

### Step 3: Determine the Product
The reaction between formaldehyde and excess ammonia leads to the formation of hexamethylenetetramine (also known as urotropine). The chemical formula for hexamethylenetetramine is C₆H₁₂N₄.

### Step 4: Write the Balanced Equation
The balanced chemical equation for the reaction is:
\[ 6 \text{CH}_2\text{O} + 4 \text{NH}_3 \rightarrow \text{C}_6\text{H}_{12}\text{N}_4 + 6 \text{H}_2\text{O} \]

### Step 5: Conclusion
Thus, the product formed when formaldehyde reacts with excess ammonia is hexamethylenetetramine.

### Final Answer
Formaldehyde reacts with excess ammonia to give hexamethylenetetramine.

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