Question

Assertion: The pH of a $0.01$ molar solution of $HCl$ is $2$.
Reason: Dilute $HCl$ dissociates into two essentially ionic particles.

• A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion
• B. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
  
• C. Assertion is true but Reason is false
• D.
  Assertion is false but Reason is true
• E. Both Assertion and Reason are false

Answer 1

The correct option is B Both Assertion and Reason are true but Reason is not the correct explanation of Assertion

$pH=-lo{g}_{10}\left[H^{+}\right]=-lo{g}_{10}[0.01=2$

Since $pH=-{log}_{10}\left[H^{+}\right]$ (it depend only on $H^{+}$ ${conc}^n$)

So, reason do not explain it.