Home
Class 12
CHEMISTRY
Assertion : Phenol undergoes Kolbe's re...

Assertion : Phenol undergoes Kolbe's reaction whereas ethanol does not .
Reason : Phenoxide ion is more basic than ethoxide ion .

A

If both assertion and reason are correct and reason is correct explanation for assertion.

B

If both assertion and reason are correct but reason is not correct for assertion.

C

If assertion is correct but reason is incorrect.

D

If both assertion and reason are incorrect.

Text Solution

Verified by Experts

The correct Answer is:
c
Correct reason : The conjugate base phenoxide ion is more resonance stabilised than ethoxide ion and can participate in the electrophilic substitution more readily than ethoxide ion.
Promotional Banner

Similar Questions

Explore conceptually related problems

In Kolbe's reaction, instead of phenol, phenoxide ion is treated with carbon dioxide. Why?

Assertion: The pK_(a) of acetic acid is lower than that of phenol. Reason : carboxylate ion is more resonance sabilised.

Give reasons: Fluoride ion has higher hydration enthalpy than chloride ion.

Tertiary alkyl undergoes solvolysis in either acetic acid or in ethanol. In which solvent reaction is more rapid and why?

Give reason for the following : CH_2=CH^- is more basic than HC≡C^- .

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.

Assertion: In sodium chloride crystal, the co-ordination number of Na^(+) ion is six Reason: Sodium ion is smaller in size than chlorine ion

Assertion. The genetic code is degenerate. Reason. Most amino acids are coded by more than one codon.

Assertion (A) : The size of a cation is larger in TV than in OV . Reason (R ) : Cations occupy more space than anions is crystals packing.

Assertion : Reason : Alkyl arly ethers on reaction with halogen acids always from aryl halide due to formation of more stable carbocation.