NEET (NTA)-National Eligibility cum Entrance Test (Medical) Chemistry: Questions 610 - 615 of 1258

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Question number: 610

» Organic Compounds with Oxygen » Aldehyde and Ketones » Nature of Carbonyl Group

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MCQ▾

Question

At room temperature, formaldehyde is?

Choices

Choice (4) Response

a.

Not known

b.

A solid

c.

A liquid

d.

A gas

Question number: 611

» Organic Compounds with Oxygen » Aldehyde and Ketones » Nature of Carbonyl Group

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MCQ▾

Question

The decreasing order of the ratio of HCN addition to compounds A to D is

1. HCHO,

2. ,

3. Ph ,

4

Choices

Choice (4) Response

a.

1 > 2 > 3 > 4

b.

3 > 4 > 2 > 1

c.

4 > 2 > 3 > 1

d.

4 > 3 > 2 > 1

Question number: 612

» Organic Compounds with Oxygen » Aldehyde and Ketones » Nucleophilic Addition to >C=O Group

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MCQ▾

Question

In the following sequence of reactions the end-product is?

Reaction of aldehyde with HCN and then water

Reaction of Aldehyde with HCN and then Water

Find the end-product produced by the reaction of aldehyde with HCN and then water

Choices

Choice (4) Response

a.

Acetic acid

b.

Ethylamine

c.

Acetamide

d.

2-Hydroxypropanoic acid

Question number: 613

» Organic Compounds with Oxygen » Aldehyde and Ketones » Acidity of Hydrogen

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MCQ▾

Question

Which of the following statements about carbonyl compounds is correct?

Choices

Choice (4) Response

a.

The anion left after the removal of H+ is stabilized Enolate anion

b.

-H atom is acidic

c.

The base, catalyzed Aldol condensation is due to the acidic nature of -H atom

d.

All a. , b. and c. are correct

Question number: 614

» Organic Compounds with Oxygen » Aldehyde and Ketones » Cannizzaro Reaction

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MCQ▾

Question

Which of the following does not give cannizzaro reaction?

Choices

Choice (4) Response

a.

P-nitro benzaldehyde

b.

Benzaldehyde

c.

Acetaldehyde

d.

Formaldehyde

Question number: 615

» Organic Compounds with Oxygen » Aldehyde and Ketones » Haloform Reaction

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MCQ▾

Question

The compound that will not give iodoform test on treatment with alkali and iodine is?

Choices

Choice (4) Response

a.

Isopropyl alcohol

b.

Ethanol

c.

Diethyl ketone

d.

Acetone