Question # 1

The halide which is not hydrolysed is

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SiCI₄

SiF₄

CCI₄

PbCI₄

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.

Carbon atom holding halogen in aryl halides is

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Sp²-hybridesed

Sp³-hybridesed

Sp-hybridesed

Sp³d -hybridesed

Which of the following compounds has the lowest anion to cation size ratio?

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LiF

NaF

CsI

CsF

The reaction/method that does not give an alkane is

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Catalytic hydrogenation of alkanes

Wurtz reaction

Hydrolysis of alkyl magnesium bromide

Dehydrohalogenation of an alkyl halid.

Toluene can be oxidized to benzonic acid by

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KMnO4 (alk)

K₂Cr₂O₇(acidic)

Both

None

One mole of a gas refers to

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The number of molecules in one litre of gas

The number of molecules in one gram of gas

The number of molecules contained in 12 grams of ¹²C isotope

The number of molecules in 22.4 liters of a gas at S.T.P.

When sulphur is boiled with Na₂SO₃solution the compound formed is

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Sodium sulphides

Sodium sulphates

Sodium persulphate

Sodium thiosulphate

Sodium metal cannot be stored under

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Benzene

Kerosene oil

Alcohol

Toluene

Which metal is protected by a layer of its own oxide?

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AI

Ag

Au

Fe

When electricity is passed through molten AI₂O₃ + Na₃AIF₆ and 13.5 gms AI are deposited,the number of faraday must be

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0.5

1.0

1.5

2.0

The relative rates of diffusion of a gas (molecular weight = 128) as compared to oxygen is

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2 times

1/4

1/8

1/2

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

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1

2

3

4

Salol is prepared from

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Salicyclic acid and phenol

Salicyclic acid and methyl alcohol.

Both

None

For preparing an alkane, a concentrated aqueous solution of sodium or potassium salt of saturated carboxylic acid is subjected to

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Hydrolysis

Oxidation

Hydrogenation

Electrolysis

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

Ozane is not

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An allotrope

A powerful oxidizing agent

Paramegnetic

a bent molecule

Chief air pollutant which is likely to deplete ozone layer

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Suphure dioxide

Carbon dioxide

Nitrogen oxides and chloro flrorocarbons

Given below are some statements concerning formic acid, which of them is true?

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It is a weaker acid than acetic

it is a reducing agent

When its calcium salt is heated, it forms a ketone

It is an oxidizing agent

Fertililzer are made by

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Nature only

Artificial methods only

Both artificial and natural methods

None of the above

The freezing point of 1 molal NaCl solution assuming NaCl to be 100% dissociated in water in

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-1.86°C

-3.72°C

+1.86°C

+3.72°C

Which of the following is not present in RNA?

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Uracil

Thymine

Ribose

Phosphate

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