JEE Mains · Chemistry · STD 11 - 6.2. Equilibrium - II (icon Equilibrium)
Given below are two statements one is labelled as Assertion \(A\) and the other is labelled as Reason \(R:\) Assertion \(A :\) The amphoteric nature of water is explained by using Lewis acid/base concept. Reason \(R\) : Water acts as an acid with \(NH _{3}\) and as a base with \(H _{2} S\). In the light of the above statements choose the correct answer from the options given below :
- A Both \(A\) and \(R\) are true and \(R\) is the correct explanation of \(A\).
- B Both \(A\) and \(R\) are true but \(R\) is NOT the correct explanation of \(A\).
- C \(A\) is true but \(R\) is false.
- D \(A\) is false but \(R\) is true.
Answer & Solution
Correct Answer
(D) \(A\) is false but \(R\) is true.
Step-by-step Solution
Detailed explanation
\(\underset{\text { Acid }}{ H _{2} S }+\underset{\text { Base }}{ H _{2} O } \rightleftharpoons H _{3} O ^{+}+ HS ^{-}\) \(\underset{\text { Acid }}{ H _{2} O }+\underset{\text { Base }}{ NH _{3}} \rightleftharpoons NH _{4} OH\)
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