1.

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

Answer»

magnesium nitrate
CALCIUM nitrate
barium nitrate
strontium nitrate

Solution :Calcium GIVES brick red flame. Calcium nitrate on heating get decompose and produce calcium OXIDE and mixture of `NO_(2)` and `O_(2).NO_(2)` is BROWN gas.
`2Ca(NO_(3))_(2) to 2CaO+NO_(2)+O_(2)`
`NO_(2)` is brown coloured gas.


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