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UPSC CDS 2 2018 GK Paper
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© examsnet.com
Question : 3
Total: 120
Reaction between which of the following two reactants will produce hydrogen gas?
[2018 CDS-II]
Magnesium and hydrochloric acid
Copper and dilute nitric acid
Calcium carbonate and hydrochloric acid
Zinc and nitric acid
Validate
Solution:
Reaction of metals with acid yields hydrogen gas. The reaction between magnesium and hydrochloric acid will produce hydrogen gas.
Reaction is as follows:
M
g
+
2
H
C
l
→
M
g
C
l
2
+
H
2
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