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NAT I Engineering Chemistry MCQs With Answers

Question # 1

The order of reactivity of halogens in aliphatic substitution reactions is

Choose an answer

Br2 > CI2 > F2

CI2 > Br2 > F2

CI2 CI2 > Br2

F2 > Br2 > CI2

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Question # 2

Dilute hydrochloric acid solution cannot be concentrated by boiling beyond

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11%

33%

44%

22%

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Question # 3

Salol is prepared from

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Salicylic acid and phenol

Salicylic acid and methyl alcohol

Both

None

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Question # 4

Bragg's law is given by equation

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n λ = 2 θ sin θ

n λ = 2 d sin θ

2nλ = d sin θ

nλ = 1/2 d sin θ

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Question # 5

The rate at which a substance reacts depends on its

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Atomic weight

Equivalent weight

Molecular weight

Active mass

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Question # 6

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 # 7

Reaction of ethylamine with chloroform in alcoholic KOH producers

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CH₃OH

CH₃NC

C₂H₅NC

C₂H₅CN

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Question # 8

Which of the following units represents largest amount of energy?

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Calorie

Joule

Erg

Electron vol.

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Question # 9

Which of the following alkali metal hydroxides is the strongest base?

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LiOH

NaOH

KOH

CaOH

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Question # 10

The total number of protons in 10 g of calcium carbonate is (N_o = 6.023 x 10²³)

Choose an answer

1.5057 x 10²⁴

2.0478 x 10²⁴

3.0115 x 10²⁴

4.0956 x 10²⁴

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Question # 11

An exothermic reaction is one in which the reacting substances

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Have more energy than the products

Have less energy than the products

Have the same energy as the products

Are at a higher temperature than the products

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