Methyl isothiocyanate on complete hydrolysis gives :

Options

A. methyl amine
B. N-methyl thicocarbamic acid
C. Methanethiol
D. Methanol

Answer

To determine the product of the complete hydrolysis of methyl isothiocyanate, we can follow these steps:

### Step 1: Identify the Structure of Methyl Isothiocyanate
Methyl isothiocyanate has the structure:
- Methyl group (–CH3)
- Isothiocyanate functional group (–N=C=S)

### Step 2: Write the Hydrolysis Reaction
The hydrolysis of methyl isothiocyanate involves the reaction with water (H2O) in the presence of an acid (H+). The reaction can be represented as:
\[ \text{CH}_3\text{N=C=S} + \text{H}_2\text{O} \rightarrow \text{Products} \]

### Step 3: Break the Isothiocyanate Bond
During hydrolysis, the double bond between nitrogen and carbon will break. The nitrogen will gain a hydrogen ion (H+) from water, and the carbon will bond with a hydroxyl group (–OH) from water.

### Step 4: Form the Intermediate Product
After breaking the bond, we form an intermediate product:
- The nitrogen now has a hydrogen (–NH2).
- The carbon is bonded to a hydroxyl group (–OH).
- The sulfur remains attached to the carbon.

This gives us:
\[ \text{CH}_3\text{NH}_2 + \text{CS}_2\text{O} \]

### Step 5: Identify the Final Products
The final products of the complete hydrolysis of methyl isothiocyanate are:
- Methyl amine (CH3NH2)
- Carbon disulfide (CS2) and water (H2O)

### Conclusion
Thus, the complete hydrolysis of methyl isothiocyanate yields methyl amine.

### Final Answer
**Methyl amine (CH3NH2)**

---