Question

2) The pH of 1x10-1M (HNO3) solution is:

A)1
B) 1.3
C)5
D)2

Answer 1

Concentration of H+ ions in HNO3 solution is 10⁻¹ which is equal to 0.1 M

$\bf \: pH \: = - log[{h}^{ + }]$

putting the value we get

$\sf \dashrightarrow \: pH \: = - log \: [ \frac{1}{10}] \\ \\ \sf \dashrightarrow \: pH \: = - log \: {10}^{ - 1} \\ \\ \sf \dashrightarrow \: pH \: = 1$

So, the required option is A) 1