MCQ
A substance which gives brick red flame and breaks down on heating to give oxygen and brown gas is :
- AMagnesium nitrate.
- BCalcium nitrate.
- ✓Barium nitrate.
- DStrontium nitrate.
✓
Answer
Correct option: C.
Barium nitrate.
$\text{Ca}(\text{NO}_3)_2\xrightarrow{\text{Heat}}\text{CaO}+\text{NO}_2+\text{O}_2.$
$Ca$ imparts brick red colour, $\text{NO}_2$ is a brown gas.
$Ca$ imparts brick red colour, $\text{NO}_2$ is a brown gas.
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