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Assertion :- A solution of NH(4)Cl in wa...

Assertion :- A solution of `NH_(4)Cl` in water is acidic in nature.
Reacon : - Ammonium ions undergo hydroysis to from `NH_(4)OH` .

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the assertion-reason question regarding the nature of a solution of \( NH_4Cl \) in water, we will analyze both the assertion and the reason step by step. ### Step 1: Understand the Assertion The assertion states that a solution of \( NH_4Cl \) in water is acidic in nature. - **Explanation**: When \( NH_4Cl \) (ammonium chloride) is dissolved in water, it dissociates into \( NH_4^+ \) (ammonium ions) and \( Cl^- \) (chloride ions). The ammonium ion \( NH_4^+ \) can donate a proton (H+) to water, leading to the formation of hydronium ions \( H_3O^+ \). The presence of these hydronium ions is what makes the solution acidic. ### Step 2: Understand the Reason The reason states that ammonium ions undergo hydrolysis to form \( NH_4OH \). - **Explanation**: Hydrolysis refers to the reaction of a substance with water. The ammonium ion \( NH_4^+ \) can react with water as follows: \[ NH_4^+ + H_2O \rightleftharpoons NH_4OH + H^+ \] However, \( NH_4OH \) is not a stable compound in solution; it is often represented as a weak base. The key point here is that the hydrolysis of \( NH_4^+ \) produces \( H^+ \) ions, which contribute to the acidity of the solution. ### Step 3: Conclusion - **Assertion**: True (the solution is indeed acidic). - **Reason**: True (ammonium ions do undergo hydrolysis), but it does not correctly explain why the solution is acidic. The acidity is primarily due to the production of \( H^+ \) ions and not directly due to the formation of \( NH_4OH \). ### Final Answer Both the assertion and the reason are true, but the reason is not the correct explanation for the assertion.
To solve the assertion-reason question regarding the nature of a solution of \( NH_4Cl \) in water, we will analyze both the assertion and the reason step by step. ### Step 1: Understand the Assertion The assertion states that a solution of \( NH_4Cl \) in water is acidic in nature. - **Explanation**: When \( NH_4Cl \) (ammonium chloride) is dissolved in water, it dissociates into \( NH_4^+ \) (ammonium ions) and \( Cl^- \) (chloride ions). The ammonium ion \( NH_4^+ \) can donate a proton (H+) to water, leading to the formation of hydronium ions \( H_3O^+ \). The presence of these hydronium ions is what makes the solution acidic. ### Step 2: Understand the Reason ...
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Knowledge Check

  • Assertion : The pH of NH_(4)Cl solution in water is less than 7 and pH of CH_(3)COONa solution is more than 7. Reason : NH_(4)Cl is a salt of weak NH_(4)OH and strong acid HCl whereas CH_(3)COONa is salt of a weak acid CH_(3)COOH and strong base NaOH.(a)If both assertion and reason are true and reason is the correct explanation of assertion. (b)If both assertion and reason are true but reason is not the correct explanation of assertion. (c)If assertion is true but reason is false. (d)If both assertion and reason are false

    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    If assertion is true but reason is false.
    D
    If both assertion and reason are false.

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