A substance which gives brick red flame and breaks down on heating to give oxygen and a brown gas is

Magnesium Nitrate

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Calcium Nitrate

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Barium Nitrate

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Strontium Nitrate

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Solution

The correct option is B Calcium Nitrate
Calcium gives brick red colour and nitrate gives $O_{2}$ and brown gas of $N O_{2}$
$2 C a (N O_{3})_{2} Δ \to 2 C a O + O_{2} + 4 N O_{2}$

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A substance which gives brick red flame and breaks down on heating to give oxygen and a brown gas is

The correct option is B Calcium NitrateCalcium gives brick red colour and nitrate gives O2 and brown gas of NO2 2Ca(NO3)2Δ→2CaO+O2+4NO2

The correct option is B Calcium Nitrate
Calcium gives brick red colour and nitrate gives $O_{2}$ and brown gas of $N O_{2}$
$2 C a (N O_{3})_{2} Δ \to 2 C a O + O_{2} + 4 N O_{2}$