A yellow coloured powdery substance A is insoluble in water but soluble in carbon disulphide.It gives a gas when it is heated in presence of air. IWhat will be the action of this gas on:- i)dry litmus paper ii)moist litmus paper Identify A and write the balanced equations.

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Most likely it is Sulfur

The Properties of sulfur are:

Sulfur is not water soluble but is soluble in carbon disulphide.

Sulfur is a yellow powdery substance.

Sulfur will in the presence of oxygen and heat form sulfur dioxide which is a colorless gas.

The reaction is as thus:

S...

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Most likely it is Sulfur

The Properties of sulfur are:

Sulfur is not water soluble but is soluble in carbon disulphide.

Sulfur is a yellow powdery substance.

Sulfur will in the presence of oxygen and heat form sulfur dioxide which is a colorless gas.

The reaction is as thus:

S + O2----------> SO2

 

The dry litmus will not react.

The wet will react as an acid due to this reaction:

 

SO2 + H2O -----------> H2SO3

 

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