Question # 1

At room temperature formaldehyde is

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Gas

Liquid

Solid

None of the above

Bleaching action of bleaching powder is due to the liberation of

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O₂

OCI^-

CI₂

CI^-

Wholer prepared ures from

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Ammonia

NH₄CNO

NH₃

uric acid

Which of the following is acidic?

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SO₃

N₂O

BeO

HgO

The rate of a reaction that does not involve gases does not depend upon

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Pressure

Temperature

Concentration

Catalyst

Which of the following belongs to the halogen family?

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Francium

Polonium

Radium

Astatine

The formula of nitre is

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KNO₃

NaNO₃

NaCI

Na₂CO₃

Which of the following imparts violet colouration to the non-luiminous flame of Bunsen burner?

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NaCI

BaCI₂

CaCI₂

KCI

Tollen's reagent is

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Ammonical cuprous chloride

Ammonical cuprous oxide

Ammonical silver bromide

Ammonical silver nitrate

For most of the chemical reaction the rate of reaction

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Increases as the reaction proceeds

Decreases as the reaction proceeds

May increases or decreases during the reaction

Remains constant as the reaction

Addition of iron filling to CuSO₄solution caused precipitation of Cu awing to the

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Reduction of Cu²⁺

Oxidation of Cu²⁺

Reduction of Fe

Reduction of Fe³⁺

Which one of the following has the lowest boiling point?

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B

Al

Ga

Ti

The total pressure exerted by a number of non-reacting gases is equal to the sum of partial pressure of the gases under the same conditions is known as

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Boyle's law

Charle's law

Avogadro's law

Dalton's law

Which of the following fluorides of xenon is impossible?

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XeF₂

XeF₃

XeF₄

XeF₆

Among alkali metal salts, the lithium salts are the poorest conductors of electricity in aqueous solution because of

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Easy diffusion of Li⁺ions

Lower ability of Li⁺ions to polarize water molecules

Lowest charge to radius ratio

Higher degree of hydration of Li⁺ions

Sulphonation of benzoic acid produces mainly

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o-Sulphobenzoic acid

m-Sulphobenzoic acid

p-Sulphobenzoic acid

o- and p-Sulphobenzoic acid

If one litre of air is passed repeatedly over heated copper and magnesium till no further reduction in volume takes place, the volume finally obtained would be approximately

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800mL

200mL

10mL

Zero

Red P can be obtained from white P by

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Heating it with a catalyst in an inert atmosphere

Distilling it in an inert atmosphere

Dissolving it in CS₂and crystallzing

Melting it and pouring the liquid into water

A clathrate may be defined as a

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Cage compound

Liquid crystal

Mixture

Solid solution

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

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80°

60°

180°

90°

Causticisation process is used for the preparation of

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Caustic soda

Caustic potash

Baryata solution

Slaked lime

Acid rains are produced by

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Excess NO₂ and SO₂from burning fossil fuels

Excess production of NH₃ by industry and coal gas

Excess release of carbon monoxide by incomplete combustion

Excess formation of CO₂ by combustion and animal respiration

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