Question

Define $pH$ scale.

• A. It is a scale representing number between $0-14$
• B. It is a scale showing relative strength of acids and alkalis
• C. It is a scale representing numbers to check for $pH$
• D. Both $B$ and $C$

Answer 1

The correct option is D Both $B$ and $C$

The $pH$ scale is a scale showing relative strength of acids and alkalis.
The $pH$ of a solution is equal to the negative power to which 10 must be raised in order to express hydrogen ion concentration.
$\left[H^{+}\right]={10}^{-pH}$
The $pH$ of solution is the negative logarithm of its hydrogen ion concentration.
$pH=-log\left[H^{+}\right]$
For neutral solution, $pH=7$, for acidic solution, $pH<7$, for basic solution, $pH>7$