Question

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.

Answer 1

(a) (i) There will be no action on dry litmus paper.
(ii) The colour of litums paper will turn red because sulphur is a non-metal and the oxides of non-metal are acidic in nature.
(iii) `S(s)+O_(2)(g)rarrSO_(2)(g)`