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NAT I Engineering Chemistry MCQs With Answers

Question # 1

Which of the following method is most appropriate for the manufacture of methane?

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By reduction of CH2CL2

Wurtz reaction

Liquification of natural gas

None of these

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Question # 2

Natural fertilizer provides potassium in the form of K₂O (potash)

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1.5 kg

3 kg

4.5 kg

6.5 kg

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Question # 3

Octane number is zero for

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n-Heptane

Isooctane

n-Hexane

Isoheptane

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Question # 4

2 g oxygen contains number of atoms equal to that in

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0.5 g of hydrogen

4 g of sulphur

7 g of nitrogen

2.3 g of sodium

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Question # 5

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 # 6

Reaction of ethylamine with chloroform in alcoholic KOH producers

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CH₃OH

CH₃NC

C₂H₅NC

C₂H₅CN

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Question # 7

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

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Question # 8

Among the alkaline earth metals the element forming predominantly covalent compounds is

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Calcium

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Question # 9

Which of the following fluorides of xenon in impossible?

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XeF₂

XeF₃

XeF₄

XeF₆

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Question # 10

Which of the following transition metal ions will have definite value of magnetic moment?

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Sc³⁺

Ti³⁺

Cu⁺

Zn²⁺

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Question # 11

The substance used as a smoke screen in warfare is

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SiCI₄

PH₃

PCI₅

Acetylene

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