Assertion :Methanol cannot be prepared by the hydration of an alkene. Reason: Hydration of alkenes is electrophilic addition reaction. Alkenes when treated with dil. sulfuric acid form alcohol by Markonikov's rule and the protonation gives more stable carbocation and the minimum number carbons required is two.

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

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

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

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Assertion is correct, but Reason is incorrect.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Both Assertion and Reason are incorrect.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
During hydration of alkene, $H$ atom is attached one unsaturated $C$ atom and $- O H$ group is attached another unsaturated $C$ atom. Thus we need at least two $C$ atoms in an alkene. But methanol $(C H_{3} - O H)$ has only one $C$ atom. Hence, methanol cannot be prepared by the hydration of an alkene.
Note: Hydration of ethylene to form ethanol is shown below.
$C H_{2} = C H_{2} H_{2} O / H_{2} S O_{4} - ------- \to C H_{3} - C H_{2} - O H$ .

Suggest Corrections

Similar questions

Assertion

Lithium sulphate does not form alums.

Reason

$L i^{+}$ is too small to form a stable lattice required for double-salt/alum formation.

Q. Assertion: The compressibility factor for

H_{2}

and

H e

(1 + \frac{P b}{R T})

Reason: The compressibility factor for

H_{2}

and

H e

can be derived from Van der Waal's equation.

Assertion (A) Order of the reaction can be zero or fractional.

Reason (R) We cannot determine order from balanced chemical equation.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

Assertion (A) Ethanol is a weaker acid than phenol.
Reason (R) Sodium ethoxide may be prepared by the reaction of ethanol with aqueous NaOH.
(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.

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.

Join BYJU'S Learning Program