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NAT I Engineering Chemistry MCQs With Answers

Question # 1

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 # 2

In the manufacture of iron from haematite,limestone is added to act as.

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Flux

A reducing

Slag

An oxidizing agent.

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Question # 3

The treatment of benzene with isobutene in the presence of sulphuric acid give

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Isobutyl benzene

Tert-Butyl benzene

n-Butyl benzene

no reaction

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Question # 4

The number of unpaired electrons in the P-subshell of oxygen atom

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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

In N.W.F.P the phosphate fertilizer are produced at

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D.I.Khan

Haripur

Nowshera

Dargai

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Question # 7

Heating a mixture of sodium benzoate and soda lime gives

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Methane

Benzene

Sodium benzene

Calcium benzoate

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Question # 8

Addition of iron filling to CuSO₄solution caused precipitation of Cu awing to the

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Reduction of Cu²⁺

Oxidation of Cu²⁺

Reduction of Fe

Reduction of Fe³⁺

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Question # 9

The formula of calcium cyanamide is

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Ca(CN)₂

CaC₂N

CaNCN

CaCHNH₂

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Question # 10

Inert pair effect plays an important role in case of

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Question # 11

With increasing principle quantum number the energy difference between adjacent energy levels in H atom

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Decreases

Increases

Remains constant

Decreases for low value of Z and increases for higher value of Z.

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