A yellow coloured powder X is soluble in carbon disulphide


#1

A yellow coloured powder X is soluble in carbon disulphide. It burns with a blue flame forming suffocating smelling gas which turns moist blue litmus red. Identify X and give chemical reaction. Identify whether it is a metal or a non-metal?


#2

Yellow coloured powder X which is soluble in CS2 is sulphur. Sulphur burns in oxygen to give sulphur dioxide gas (SO2) which is suffocating smelling gas.
S + O2 -------> SO2
SO2 gas turns moist blue litmus red. This confirms that the gas is acidic in nature. Hence, S is a non-metal.