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CBSE

Chemistry

NEET Chemistry : Alcohols, Phenols and Ethers

71.

The IUPAC name of is :

72.

Benzoic acid is treated with lithium aluminium hydride. The compound obtained is

73.

The condensation product of reaction between phenol and phthalic anhydride :

74.

Assertion: Phenol undergoes Kolbe's reaction whereas ethanol does not.

Reason : Phenoxide ion is more basic than ethoxide ion.

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

75.

Among the following, which is least acidic ?

76.

Assertion : Change in colour of acidic solution of potassium dichromate by breath is used to test drunken drivers.

Reason : Change in colour is due to complexation of alcohol with potassium dichromate.

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

77.

During dehydration of alcohols to alkenes by heating with conc. H₂SO₄, the initial step is :

78.

Assertion : Phenol is more acidic than ethanol.

Reason : Phenoxide ion is resonance stabilised.

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

79.

During the dehydration of alcohols to alkenes by heating with conc. H₂SO₄ the initiating step is

80.

Catalytic dehydrogenation of a primary alcohol gives a :

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