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NAT I Engineering Chemistry MCQs With Answers

Question # 1

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 # 2

Fertilizer are made by

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Nature only

Artificial methods only

Both artificial and natural methods

None of the above

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Question # 3

The wire in the flash bulbs is made up of

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Question # 4

Wt. of 112 ml of oxygen at NTP on liquefaction would be

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0.32 g

0.64 g

0.16 g

0.96 g

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Question # 5

The ratio of close packed atoms to tetrahedral holes in cubic close packing is

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1 : 1

1 : 2

1 : 3

2 : 1

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Question # 6

Acetic anhydride is obtained form acetyl chloride by the reaction of

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P₂O₅

H₂SO₄

CH₃COONa

CH₃COCH₃

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Question # 7

Which of the following value of ΔHf° represent that the product is least stable?

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-94.0 kcal mol^-1

-231.6 kcal mol^-1

+21.4 kcal mol^-1

+64.8 kcal mol^-1

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Question # 8

The rate of reaction between A and B increases by a factor of 100 when the concentration with respect to A is increased 10 folds the order of reaction w.r.t A is

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Question # 9

Galena is an ore of

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Gallium

Lead

Tin

Germanium

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Question # 10

Which one is not usually used for the crystallization

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Acetone

Acetic acid

Sulphuric acid

Chloroform

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Question # 11

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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