Question

A solution that is a 4 on the pH scale is a _____.

A) weak acid
B) strong acid
C) weak base
D) strong base

Answer 1

B.
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Answer 2

We know, the pH ranges from 0 to 14, when we go 7 to 0 strength of Acid increases, as it is in mid-way it will be considered "strong acid"

In short, Your Answer would be Option B

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