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NAT I Engineering Chemistry MCQs With Answers

Question # 1

The osmotic pressure of solution increases if

Choose an answer

Temperature is decreased

Solution constant is increased

Number of solute molecules are increased

Volume is increased

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Question # 2

The effect of increasing the pressure on the following equilibrium 2A + 3B | | 3A + 2B is

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Forward reaction is favoured

Backward reaction is favoured

No effect

None of the above

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Question # 3

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 # 4

Propyne on hydrolysis in presence of H₂SO₄ and HgSO₄ gives

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Acetaldehyde

Actone

Formaldehyde

None

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Question # 5

Which species represents the electrophile in aromatic nitrotaion?

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NO^-₂

NO₂

NO2

NO^-₃

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Question # 6

Toluene can be oxidized to benzonic acid by

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KMnO4 (alk)

K₂Cr₂O₇(acidic)

Both

None

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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

Dehydration of glycerol give

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Propane

Propene

Acrolein

Benzene

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Question # 9

The relative rates of diffusion of a gas (Mol, wt. - 98) as compared to hydrogen will be

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1/7

1/5

1/4

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Question # 10

How many moles of Helium gas occupy 22.4 L at 0^oC at 1 atm.Pressure?

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0.11

0.90

1.0

1.11

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Question # 11

The structure of XeF₆

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Distorted octahedral

Pyramidal

Tetrahedral

None of the above

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