Question # 1

Which is not a colligative property?

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Osmotic pressure

Lowering of vapour pressure

Depression of freezing point

Elevation of boiling point

The formula of calcium cyanamide is

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Ca(CN)₂

CaC₂N

CaNCN

CaCHNH₂

The most reactive compound for electrophilic nitration will be

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Benzyl chloride

Benzoic acid

Nitrobenzene

Chlorobenzene

The percentage of oxygen in NaOH is

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40

60

8

10

SO₂ and NO₂ pollution by increasing

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Alkalinity

Acidity

Neutrality

Buffer action

The bond angle H - O - H in ice is closest to

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120° , 28°

60°

90°

109°

The main structure features of proteins is

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An ester linkage

An ether linkage

The peptide linkage

All

Which of the following elements is most electronegative?

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Oxygen

Chlorine

Nitrogen

Fluorine

Heating a mixture of sodium benzoate and soda lime gives

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Methane

Benzene

Sodium benzene

Calcium benzoate

In cold countries ethylene glycol is added to water in radiators of cars during winter It result in

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Lowering in b.pt.

Reducing viscosity

Reducing specific heat

Lowering in freezing pt.

Which of the following is different from the other three oxides?

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MgO

SnO

ZnO

Cr₂O₃

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