question_answer

  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. 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. [NCERT]

Answer:

                    (a) When sulphur is heated in air, sulphur dioxide gas is formed. (i)Sulphur dioxide has no action on dry litmus paper. (ii)Sulphur dioxide turns blue litmus paper to red. (b)