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Standard XII

Chemistry

Addition of Sulphuric Acid and Water

Assertion : ...

Question

Assertion : $H_{3} B O_{3}$ is monobasic acid in water. Reason: In water ionise as $H_{3} B O_{3} ⇌ H_{2} B O_{3} + H^{+}$ .

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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Assertion is incorrect but Reason is correct.

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Solution

The correct option is C Assertion is correct but Reason is incorrect.

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Assertion (A) Addition reaction of water to but-1-ene in acidic medium yields butan-1-ol.
Reason (R) Addition of water in acidic medium proceeds through the formation of primary carbocation.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

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Reason: $C a C O_{3}$ which decomposes into $C a O$ and $C O_{2}$ . The $C a O$ formed reacts with $S i O_{2}$ to remove silica

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Assertion :H3BO3 is monobasic acid in water. Reason: In water ionise as H3BO3⇌H2BO3+H+.

The correct option is C Assertion is correct but Reason is incorrect.

Assertion : $H_{3} B O_{3}$ is monobasic acid in water. Reason: In water ionise as $H_{3} B O_{3} ⇌ H_{2} B O_{3} + H^{+}$ .