In 1774. a British clergyman named
Joseph Priestley conducted an experiment
in which he focussed sunrays on a tube
containing mercuric oxide. This produced
a gas which he noticed made candles
burn brighter, thus discovering a gas
which is the very essence of life. Which
gas was it?
(A) Carbon dioxide
(B) Nitrogen
(C) Oxygen
(D) Helium
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Answer:
oxygen is your answer
Explanation:
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