NEET (NTA)-National Eligibility cum Entrance Test (Medical) Chemistry: Questions 736 - 741 of 1258

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Question number: 736

» Basic Concepts in Chemistry » Empirical and Molecular Formulae

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MCQ▾

Question

Two elements X and Y have atomic mass 75 and 16 respectively. They combine to give a compound having X. The formula of the compound is?

Choices

Choice (4) Response

a.

b.

c.

d.

XY

Question number: 737

» Hydrocarbons » Alkynes » Addition of Hydrogen, Halogens, Water and Hydrogen Halides

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MCQ▾

Question

When acetylene is passed into methanol at 160 - 200°C in the presence of a small amount of potassium methoxide under pressure, the following is formed –

Choices

Choice (4) Response

a.

Polyvinyl alcohol

b.

Divinyl ether

c.

Dimethyl ether

d.

Methyl vinyl ether

Question number: 738

» Basic Concepts in Chemistry » Physical Quantities and Measurements

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MCQ▾

Question

The amount of heat required to raise the temperature of one gram of water from ?

Choices

Choice (4) Response

a.

Calorie

b.

Joule

c.

Kilojoule

d.

Kilocalorie

Question number: 739

» Organic Compounds with Oxygen » Preparation, Properties and Reactions and Uses

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MCQ▾

Question

The reagent used for the dehydration of an alcohol is

Choices

Choice (4) Response

a.

Phosphorus pentachloride

b.

Aluminum oxide

c.

Calcium chloride

d.

Sodium chloride

Question number: 740

» Organic Compounds with Halogens » Preparation, Properties and Reactions

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MCQ▾

Question

Which of the following reaction can be used to prepare methane?

(1) Catalytic reduction of methyl iodide

(2) Clemmensen reduction

(3) Reduction of methyl iodide by using a zinc-copper couple

(4) Wurtz reaction

Which is the correct choice?

Choices

Choice (4) Response

a.

1,2 and 3 are correct

b.

1 and 2 are correct

c.

2 and 4 are correct

d.

1 and 3 are correct

Question number: 741

» Basic Concepts in Chemistry » Matter and Its Nature

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MCQ▾

Question

Which one of the following is not a chemical change?

Choices

Choice (4) Response

a.

Sublimation

b.

Rusting

c.

Electrolysis

d.

Combustion