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

Calcium nitrate

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Magnesium nitrate

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Magnesium carbonate

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Calcium carbonate

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Solution

The correct option is A
Calcium nitrate

Since the magnesium or its compound does not give flame test, it must be a compound of calcium. Also the gas evolved is brown coloured shows that it is the oxide of nitrogen. All these inference indicates towards the compound calcium nitrate.

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

The correct option is A Calcium nitrate Since the magnesium or its compound does not give flame test, it must be a compound of calcium. Also the gas evolved is brown coloured shows that it is the oxide of nitrogen. All these inference indicates towards the compound calcium nitrate.

The correct option is A
Calcium nitrate

Since the magnesium or its compound does not give flame test, it must be a compound of calcium. Also the gas evolved is brown coloured shows that it is the oxide of nitrogen. All these inference indicates towards the compound calcium nitrate.