The chemical name of Common salt is Sodium chloride

1. The chemical name of Common salt’ is
(a) Sodium chloride
(b) Sodium nitrate
(c) Ammonium chloride
(d) Calcium chloride


2.Typhoid fever is caused by-
(a) virus
(b) bacteria
(c) fungus
(d) allergy


3. Bhopal gas tragedy is associated with leakage of
(a) carbon dioxide
(b) nitrogen dioxide
(c) sulphur dioxide
(d) methyl isocyanate


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