Pratyush took sulphur powder on a spatul...

Pratyush took sulphur powder on a spatula and heated it. He collected the gas evolved by inverting a test tube over it, as shown in figure below.

(a) What will be the action of gas on
(i) dry litmus paper?
(ii) moist litmus paper?
(b) Write a balanced chemical equation for the reaction taking place.

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Sameer took sulphur powder on a spatula and heated it. He collected the gas evolved by inverting a test tube over it as shown in the figure. What will be the action of gas on dry litmus paper?

Sameer took sulphur powder on a spatula and heated it. He collected the gas evolved by inverting a test tube over it as shown in the figure. What will be the action of gas on moist litmus paper?

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