Question

Assertion :It is difficult to distinguish the strengths of the strong acids such as $HCl$, $H_{2}S{O}_4,HN{O}_3$ $HBr$, $HI$ or $HCl{O}_4$ in dilute aqueous solutions. Reason: In dilute aqueous solution all strong acids donate a proton to water and are essentially $100$% ionised to produce a solution containing $H_3{O}^{+}$ ions plus the anions of strong acid.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Assertion is incorrect but Reason is correct

Answer 1

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

In dilute aqueous solution, all strong acids are completely dissociated. They donate their proton to a water molecule to form $H_3{O}^{+}$ ion. Thus their strength is reduced to that of $H_3{O}^{+}$ ion. Thus it is difficult to distinguish their strengths in dilute aqueous solution.