When sodium formate is heated with soda lime, it forms:

Options

A. Dihydrogen
B. Ethane
C. Ethyne
D. Methane

Answer

To solve the question of what is formed when sodium formate is heated with soda lime, we can follow these steps:

### Step 1: Identify the Reactants
- Sodium formate (HCOONa) is the salt of formic acid.
- Soda lime is a mixture of sodium hydroxide (NaOH) and calcium oxide (CaO). In this reaction, we will consider the sodium hydroxide component.

### Step 2: Understand the Reaction
- When sodium formate is heated with soda lime, a reaction called decarboxylation occurs. This process involves the removal of a carboxyl group (-COOH) from the sodium formate.

### Step 3: Write the Reaction
- The reaction can be represented as:
\[ \text{HCOONa} + \text{NaOH} \xrightarrow{\text{heat}} \text{Na}_2\text{CO}_3 + \text{H}_2 \]
- Here, sodium carbonate (Na2CO3) is formed, and dihydrogen gas (H2) is released.

### Step 4: Identify the Products
- From the reaction, we see that the products are sodium carbonate (Na2CO3) and dihydrogen gas (H2).

### Step 5: Conclusion
- Therefore, when sodium formate is heated with soda lime, the main product formed is dihydrogen gas (H2).

### Final Answer
- The correct answer is **dihydrogen gas (H2)**.

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