Assertion :The pH of an acetic acid buffer solution cannot be more than 7. Reason: Acidic buffer consists of a weak acid and its salt with a strong base.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
The pH of an acetic acid buffer solution cannot be more than 7.
An acidic buffer consists of a weak acid and its salt with a strong base.
For example, consider an acidic buffer consisting of a weak acid (acetic acid) and its salt (sodium acetate) with a strong base (sodium hydroxide).
Sodium acetate completely ionizes to provide sodium ions and acetate ions.
$C H_{3} - C O O N a ⇌ C H_{3} - C O O^{-} + N a^{+}$
Acetic acid is feebly ionised.
$C H_{3} - C O O H ⇌ C H_{3} - C O O^{-} + H^{+}$
Since protons are formed in above ionisation, an acidic buffer consists of more hydrogen ions than hydroxide ions.
$[H^{+}] > [O H^{-}]$
$[H^{+}] > 10^{- 7}$ M
$p H < 7$

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(b)

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

(c)

If assertion is true but reason is false.

(d)

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Reason: Phenol is a weaker acid than carbonic acid.

Read the assertion and reason carefully to mark the correct option out of the options given below :

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

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(d) If the assertion and reason both are false.

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Assertion: Acetic acid does not undergo haloform reaction.

Reason: Acetic acid has no alpha hydrogens.

Assertion (A) p-nitrophenol is more acidic than phenol.
Reason (R) Nitro group helps in the stabilisation of the phenoxide ion by dispersal of negative charge due to resonance.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
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(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

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