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

Options

A. `H_(2)`
B. CO
C. `CO_(2)`
D. water vapour

Answer

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

### Step 1: Understand the Reactants
Sodium formate (HCOONa) is a salt derived from formic acid. Soda lime is a mixture of sodium hydroxide (NaOH) and calcium oxide (CaO). In this reaction, sodium hydroxide is the active component that will react with sodium formate.

### Step 2: Identify the Reaction
When sodium formate is heated with soda lime, a decarboxylation reaction occurs. This means that the carboxyl group (-COO) from sodium formate is removed, leading to the formation of a simpler product.

### Step 3: Write the Reaction
The reaction can be represented as follows:
\[ \text{HCOONa} + \text{NaOH} \xrightarrow{\text{heat}} \text{Na2CO3} + \text{H2} \]

In this reaction, sodium hydroxide reacts with sodium formate to produce sodium carbonate (Na2CO3) and hydrogen gas (H2).

### Step 4: Identify the Products
From the reaction, we can see that the products formed are:
1. Sodium carbonate (Na2CO3)
2. Hydrogen gas (H2)

### Step 5: Conclusion
Thus, when sodium formate is heated with soda lime, hydrogen gas is liberated as one of the products.

### Final Answer
**Hydrogen gas (H2) is liberated when sodium formate is heated with soda lime.**

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