Name two metals used in making fuse wires.

30 Write short notes on the bleaching action of sulphur dioxide. 31 (a) What is the atomicity of sulphur?
(b) How do you bring the change of rhombic sulphur to monoclinic sulphur and vice versa?
(c) What is the action of conc. HNO₃ on sulphur? 33 (i) How can ammonia be converted to NO₂ and nitric acid?
(ii) What is liquor ammonia? 34 Complete the following reactions