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 ?
  • (d)Write a balanced chemical equation for the reaction taking place.


Answer :

(a)
(i) There will be no action on dry litmus paper.
(ii) The colour of litmus paper will turn red because sulphur is a non-metal and the oxides of non-metal are acidic in nature.

(b)
$$ S(s) + O_{2}(g) \rightarrow SO_{2}(g) $$

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