Question

a bluish green crystalline solid on strong heating leaves behind a black Residue along with redush brown gas and a glowing splint busts in to flame when hold in to brown gas​

Answer 1

Answer:

Explanation: THERE ARE MANY SUBSTANCES HERE !

LET THESE SUBSTANCES BE X , Y, Z.

X IS COPPER NITRATE

Y IS NITROGEN DIOXIDE GAS

Z IS HYDROGEN SULFIDE GAS

Reaction 1 , 2Cu(NO3)2 = 2CuO + 4NO2 +O2

Reaction 2 , Cu(NO3)2 + H2S = CuS + 2HNO3