A substance which gives brick red flame and breaks down on heating to give oxygen and a brown gas is
(i) Magnesium nitrate
(ii) Calcium nitrate
(iii) Barium nitrate
(iv) Strontium nitrate

Answers (1)

The answer is the option(ii) Ca\left (NO_{3} \right )_{2} \rightarrow CaO+NO_{2}+O_{2}

Ca gives the brick red colour and NO_{2} is a brown gas.

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