State any one relevant observation for each of the following. Ammonia is passed through phenolphthalein solution.
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Ca+2H2O→Ca(OH)2+H2↑
What volume of H2
at STP would be liberated when 8 g
of calcium completely reacts with water?
A.0.2 cm3
B.0.4 cm3
C.224 cm3
D.4480 cm3
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