Which one of the given is true, if a substance has a pH value of
4?
(a) The substance is a base
(b) The substance is an acid
(c) The substance is a neutral substance
(d) Either (a) or (b)
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Answer:
b) substance is an acid.
substance which have ph less than 7 is acid, 7 is neutral and more than 7 is a base.
Explanation:
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