18. The gas which is colourless with the smell of rotten eggs.
a. Chlorine
b. Hydrogen Sulphide
c. Hydrogen
d. Sulphur
19. Name the substance which can not be broken down by Chemical reactions into simpler sub
Compound
b Flement
c. Mixture
d. None o
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Answer:
18. (c) hydrogen
19. (b) elements
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Answer:
hydrogen sulphide ..................................
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