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NAT I Engineering Chemistry MCQs With Answers

Question # 1

Magnesium keeps on burning in

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N₂

CO₂

N₂O

N₂ as well as CO₂

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Question # 2

In the equilibrium

N₂ + 3H₂ - 2NH₃ + 22 kcal the formation of ammonia is favoured by

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Increasing the pressure

Increasing the temperature

Decreasing the pressure

Adding ammonia

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Question # 3

Ionic solids with defects contain

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Equal number of cation and anion vacancies

Interstitial anions and anion vacancies

Cation vacancies only

Cation vacancies and interstitial cations

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Question # 4

Ammonia gas used directly as a fertilizer is injected into the soil at a depth of about

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Two inches

Three inches

Five inches

Six inches

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Question # 5

Which of the following fluorides of xenon in impossible?

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XeF₂

XeF₃

XeF₄

XeF₆

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Question # 6

Tollen's reagent is

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Ammonical cuprous chloride

Ammonical cuprous oxide

Ammonical silver bromide

Ammonical silver nitrate

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Question # 7

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 # 8

Which of the following represents elements in order of increasing atomic size?

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I,Br,CI

Na,Mg,C

C,N,O

Li,Na,K

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Question # 9

The vapour density of a gas is 11.2 The volume occupied by 11.2 g of this gas at N.T.P is

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22.4 liters

11.2 liters

1 liter

2.24 liters

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Question # 10

For preparing an alkane, a concentrated aqueous solution of sodium or potassium salt of saturated carboxylic acid is subjected to

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Hydrolysis

Oxidation

Hydrogenation

Electrolysus

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Question # 11

Which is true for an element R present in group 13 of the periodic table?

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It is a gas at room temperature

It has oxidation state of +4

It forms R₂O₃

It forms RX₂

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