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  • Assertion: Ammonia is a weak base. Reason: Ammonia reacts with water to form ammonium ion and hydroxide ion.Option: 1 B

Assertion: Ammonia is a weak base.

Reason: Ammonia reacts with water to form ammonium ion and hydroxide ion.

Option: 1

Both assertion and reason are true, and the reason is the correct explanation of the assertion.


Option: 2

Both assertion and reason are true, but the reason is not the correct explanation of the assertion.


Option: 3

The assertion is true, but the reason is false.

 


Option: 4

The assertion is false, but the reason is true.


Answers (1)

best_answer

Correct Option A 

The Assertion is true. Ammonia is a weak base because it accepts protons \mathrm{\left ( H^{+} \right )} from water to form ammonium ion \mathrm{\left ( NH^{+}_{4} \right )} and hydroxide ion \mathrm{\left ( OH^{-} \right )}. This reaction is represented as follows:

\mathrm{NH_{3}+H_{2}O\leftrightharpoons NH^{+}_{4}+OH^{-}}

The Reason is also true and provides the correct explanation for the Assertion. When ammonia reacts with water, it produces ammonium ions and hydroxide ions. Ammonium ion can act as a weak acid and donate a proton, while the hydroxide ion acts as a weak base and accepts a proton. This process of proton exchange is known as the Bronsted-Lowry theory of acids and bases. Hence option A is the correct answer.

Option (B) is incorrect because it incorrectly states that the assertion is correct but the reason is incorrect. Both the assertion and reason are correct. Hence option B is incorrect.

Option (C) is incorrect because it incorrectly states that the assertion is incorrect but the reason is correct. The assertion is correct, and the reason is also correct. Hence option C is incorrect.

Option (D) is incorrect because it incorrectly states that both the assertion and reason are incorrect. Both the assertion and reason are correct. Hence option D is incorrect.



 

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rishi.raj

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