Question

Assertion: A solution with a pH of $5$ is less acidic than a solution with a pH of $8$.
Reason: A solution with a pH of $5$ has $1000$ times more hydronium ions than a solution with a pH of $8$.

• 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 D Assertion is false but Reason is true

$pH$ less than $7$ shows the acidic nature.
$pH$ more than $7$ shows the basic nature.
Hence, a solution with a pH of $5$ is more acidic than a solution with a pH of $8$.
$pH=-log\left[H^{+}\right]$
if pH = 5, then it means the $\left[H^{+}\right]$ ion concentration = ${10}^{-5}$
and if pH = 8, then it means the $\left[H^{+}\right]$ ion concentration = ${10}^{-8}$
${10}^{-8}\times 1000={10}^{-5}$
Hence , statement 2 is correct.