Assertion: Magnesium continue to burn in nitric oxide.
Reason : During burning heat evolved to not decompose NO

Options

A. If both assertion and reason are true and the reason is the correct explanation of the assertion
B. If both assertion and reason are true but reason is nto the correct exaplation of the assertion
C. If assertion is true but reason is false
D. If the assertion and reason both are false

Explanation

To solve the question, we need to analyze both the assertion and the reason provided.

### Step 1: Understand the Assertion
The assertion states that "Magnesium continues to burn in nitric oxide."
- Magnesium (Mg) is a metal that can react with various substances, including gases. In the presence of oxygen, magnesium burns brightly, producing magnesium oxide (MgO).

### Step 2: Analyze the Reaction with Nitric Oxide
Nitric oxide (NO) is a gas that can act as a source of oxygen in certain reactions.
- When magnesium burns in nitric oxide, it can react with the nitrogen and oxygen present in NO. The reaction can be represented as:
\[ 2Mg + 2NO \rightarrow 2MgO + N_2 \]
- Here, magnesium reacts with nitric oxide to produce magnesium oxide and nitrogen gas.

### Step 3: Evaluate the Reason
The reason states that "During burning, heat evolved to not decompose NO."
- This statement implies that the heat generated from the burning of magnesium does not lead to the decomposition of nitric oxide. However, in reality, the heat generated can indeed lead to the decomposition of NO into nitrogen (N2) and oxygen (O2):
\[ 2NO \rightarrow N_2 + O_2 \]
- Therefore, the reason provided is incorrect.

### Step 4: Conclusion
- The assertion is true: Magnesium does continue to burn in nitric oxide.
- The reason is false: The heat evolved does lead to the decomposition of nitric oxide.

### Final Answer
- The assertion is true, but the reason is false. Therefore, the correct option is that the assertion is true and the reason is false.