Question

PLS ANSWER IT FAST!!
Light green solid on heating gives of a black Residue and gives of a colourless gas which turns limewater milky.

Answer 1

Ya .......

And that gas evolved is
$\huge{\bold{\red{Carbondioxide}}}$

I HOPE IT IS HELPFUL........ ☺☺☺☺

Answer 2

Colourless gas is carbon dioxide