Question

Assertion :$H_{2}S$ is more acidic than $H_{2}O$. Reason: $H-S$ bond is more polar than $H-O$ bond.

• 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. Both Assertion and Reason are incorrect

Answer 1

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

The S-H bond is weaker than the O-H bond, meaning that $H_{2}S$ more easily donates a proton and is, therefore, more acidic.
Water is amphoteric; it can act both as a proton donor (acid property) and as a proton acceptor (base property).
Because of this, oxygen holds onto the hydrogen better than sulfur. So $H_{2}S$ is a stronger acid because sulfur can't hang onto that hydrogen as well as oxygen can. Remember, to be a good acid, you need to be able to lose your hydrogen atoms.
Thus, option $A$ is correct.