Question

A yellow coloured powder ‘X’ is soluble in carbon di sulphide .It burns with

a blue flame forming suffocating smelling gas which turns moist blue litmus

red. Identify ‘X’ and give chemical reaction. Identify it is a metal or non

metal.​

Answer 1

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.

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Answer 2

Answer:

X+cs2 X+O2=XO2_suffocatingsmell gas S+O2=SO2 SO2+H2O=H2SO3 turns moist blue litmus red X is Sulphur it's a non metal.