Which of the following compounds imparts red colour to the flame and decomposes on heating to give oxygen and a brown gas?

C a C O_{3}

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M g N O_{3}

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M g C O_{3}

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C a (N O_{3})_{2}

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Solution

The correct option is D $C a (N O_{3})_{2}$
$2 C a {({N O}_{3})}_{2} \to 2 C a O + 4 {N O}_{2} + O_{2}$
Calcium metal of alkaline earth metals group gives crimson red color in flame test and when calcium nitrate decomposes it gives nitrogen dioxide gas which has brown fumes on evolution.

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Which of the following compounds imparts red colour to the flame and decomposes on heating to give oxygen and a brown gas?

The correct option is D Ca(NO3)22Ca(NO3)2→2CaO+4NO2+O2Calcium metal of alkaline earth metals group gives crimson red color in flame test and when calcium nitrate decomposes it gives nitrogen dioxide gas which has brown fumes on evolution.

The correct option is D $C a (N O_{3})_{2}$
$2 C a {({N O}_{3})}_{2} \to 2 C a O + 4 {N O}_{2} + O_{2}$
Calcium metal of alkaline earth metals group gives crimson red color in flame test and when calcium nitrate decomposes it gives nitrogen dioxide gas which has brown fumes on evolution.