Pratyush took sulphur powder on a spatula and heated it. He collected the gas evolved by inverting a test tube over the burning sulphur. What will be the action of this gas on dry litmus paper :
(1) Red litmus paper turns blue.
(2) Blue litmus paper turns red.
(3) No action on litmus paper.
(4) Both 1 and 2
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As the gas produced is sulphur dioxide so it can't change the dry litmus paper as it doesn't have H ions
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