Meetu heated sulphur powder in a spatula and collected the gas evolved.
(i) Give the equation of the reaction for heating of sulphur.
(ii) Write the effect of gas on red litmus solution and blue litmus solution.
(iii) Give the type of ore whose heating will evolve the gas.

Explanation

(i) `S + underset("(air)")(O_(2)) overset("Heat")to SO_(2) (g)`
(ii) `SO_(2)` gas has no effect on red-litmus paper and this gas turns blue litmus to red, as this gas is acidic oxide.
(iii) Sulphide ores.