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Standard IX
Chemistry
Strong and Weak Acids and Bases
Assertion :pH...
Question

Assertion :pH of hydrochloric acid solution is less than that of acetic acid solution of the same concentration. Reason: In equimolar solutions, the number of titrable protons present in hydrochloric acid is less than that present in acetic acid.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Both Assertion and Reason are incorrect
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Solution

The correct option is C Assertion is correct but Reason is incorrect
In equimolar solution, HCl being strong acid dissociate more and produces more proton in comparison to CH3COOH. So the pH of the hydrochloric acid solution is less than the pH of acetic acid.

Hydrochloric acid will give more protons as compared to acetic acid because it is stronger acid hence reason is incorrect.

So the correct answer is C.

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Q. Assertion :pH value of HCl solution is less than that of acetic acid of the same concentration. Reason: In equimolar solution, the number of titrable protons present in HCl is less than that present in acetic acid.
Q.

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.

(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) If the assertion and reason both are false.

(e) If assertion is false but reason is true.

Assertion: Acetic acid does not undergo haloform reaction.

Reason: Acetic acid has no alpha hydrogens.


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If BOD level of water in reservoir is less than 5 ppm it is not polluted.

Reason
High biological oxygen demand means low activity of bacteria in water.
Q. 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.
(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)If assertion is false but reason is true.
Assertion: 4-nitrophenol is more acidic than picric acid.
Reason: Phenol is a weaker acid than carbonic acid.
Q. 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.
(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)If assertion is false but reason is true.
Assertion: 4-nitrophenol is more acidic than picric acid.
Reason: Phenol is a weaker acid than carbonic acid.
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