Which of the following statements with regard to heating of lead nitrate powder over a flame are <strong>CORRECT</strong>?<br>1. Brown fumes of NO are released.<br>2. Colourless O_2 gas is released.<br>3. It is an example of oxidation reaction.<br>4. It is an example of thermal decomposition used for production of NO_2 gas.<br>Select the <strong>CORRECT</strong> answer using the code given below.
- A. 1 and 2
- B. 2, 3 and 4
- C. 1, 3 and 4
- D. 2 and 4 only ✓
Correct Answer: D. 2 and 4 only
Explanation
Heating lead nitrate causes it to undergo thermal decomposition, yielding lead(II) oxide, nitrogen dioxide (NO_2, which is a brown gas, not NO), and oxygen (O_2, a colourless gas).
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