Question

Tick (v) the correct option.
(a) A gas that supports combustion is
(i) oxygen
(ii) hydrogen
(iv) carbon dioxide
(iii) nitrogen
(b) Water cannot be used to put off a fire caused by
(i) kerosene
(ii) petrol
(iv) all of these
(iii) electrical appliance
(c) An example of spontaneous combustion is the burning of
(i) firecracker
(ii) magnesium ribbon
(iii) forest
(iv) wax​

Answer 1

Answer:

a) oxygen

b) petrol

c) magnesium ribbon

Answer 2

a, oxygen b, all of these c, fire cracker