Question

You are given some compounds with their pH values. Arrange them in increasing order of acidity.

Compound name	pH value of compound
A	6
B	1
C	5
D	3

• A. $B<C<D<A$
• B. $A<C<D<B$
• C. $B<D<C<A$
• D. $A<B<C<D$

Answer 1

The correct option is B

$A<C<D<B$

pH scale is a method used to express the acidity or alkaline nature of a substance based on the amount of $H^{+}$ ions present in the aqueous solution. The substances which have a pH lower than 7 are acidic in nature. The lower the value of pH the stronger the acid. Therefore the correct order of the compounds with increasing acidic strength would be

$A\left(6\right)<C\left(5\right)<D\left(3\right)<B\left(1\right)$