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NAT I Engineering Chemistry MCQs With Answers

Question # 1

The substance used as a smoke screen in warfare is

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SiCI₄

PH₃

PCI₅

Acetylene

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Question # 2

The total pressure exerted by a number of non reacting gases is equal to the sum of partial pressure of the gases under the same conditions is known as

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Boyle's law

Charle's law

Avogadro's law

Dalton's law

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Question # 3

Which of the following is an example of body centred cube?

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Magnesium

Zinc

Copper

Sodium

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Question # 4

Which of the following species participate in sulphonation of benzene ring?

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H₂SO₄

HSO^-₃

SO₃

SO^-₂

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Question # 5

Which of the following process is used to separate insoluble particles from liquids?

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Separation

Filtration

Crystallization

Condensation

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Question # 6

The main structure features of proteins is

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An ester linkage

An ether linkage

The peptide linkage

All

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Question # 7

Which of the following cannot be produced by acidic dehydration of alcohols?

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Ethers

Aldehyde

Alkyl Hydrogen sulphate

Alkene

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Question # 8

Which of the following reagent cannot be used for preparing alkyl chloride from alcohol?

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HCI + anhyd. ZnCI₂

NaCI

PCI₅

SOCI₂

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Question # 9

Phosphide ion has the electronic structure similar to that of

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Nitride ion

Fluoride ion

Sodium ion

Chloride ion

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Question # 10

Which one of the following elements occurs free in nature?

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Question # 11

The credit of discovering neutron goes to

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Rutherford

Langmuir

Chadwick

Austen

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