Question # 1

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

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LiF

NaF

Csl

CsF

Inert pair effect plays an important role in case of

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F

Al

Si

Tl

Which quantum number is sufficient to describe the electron is hydrogen

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ι

n

m

s

The chemical composition of white lead is

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Na₂CO₃

Pb₃O₄

Pb(OH)₂.2PbCO₃

PbO

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

Mild oxidation of glycerol with H₂O₂/FeSO_{4 gives}

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Glyceraldehyde

Dihydroxy acetone

Glycerose

None

Which one of the following compounds does not exist?

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NCl₅

AsF₅

SbCl₅

PF₅

By using the fluted filter paper rate of filtration is

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Increased

Decreased

Filtration is constant

Having no effect

The credit of discovering neutron goes to

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Rutherford

Langmuir

Chadwick

Austen

When electrons revolve in stationary orbits,

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There is no change in energy level

They vecome stationary

They are gaining kinetic energy

There is increase in energy

Hypo is used to photography for

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Developing picture

Picture printed

The colour of picture

The fixation of picture

Which of the following has no tin in its composition?

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Solder

Bronze

Brass

Tin stone

Chief air pollutant which is likely to deplete ozone layer

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Suphure dioxide

Carbon dioxide

Nitrogen oxides and chloro flrorocarbons

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

During the folding of filter paper the apex form angle of about

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80°

60°

180°

90°

Detergents are

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Synthetic products

Natural products

Both A and B

None of the above

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