Question # 1

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

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MgO

SnO

ZnO

Cr₂O₃

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

The molal elevation constant is the ratio of the elevation in boiling point to

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Molarity

Molality

Mole fraction of solute

Mole fraction of solvent

Which of the substances Na, Hg, S Pt and graphic can be used as electrodes in electrolytic cells having aqueous solution?

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Na,Pt and graphite

Na and Hg

Pt and graphite only

Na and S only

A solution of sodium sulphate was electrolysed using some inert electrodes.The products at the electrodes are

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O₂, H₂

O₂, Na

O₂, SO₂

O₂, S₂O²-₈

If a salt bridge is removed between the two half cells the voltage

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Drops to zero

Does not change

Increases gradually

Increases rapidly

Which one is the property of an ideal solvent

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Should be expensive

It should react chemically with the solute

Impurities should crystallize along with the solute

Should be safe to use

Crystal can be classified in to basic crystal habits

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7

4

14

3

Which of the following alkali metal hydroxides is the strongest base?

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LiOH

NaOH

KOH

CaOH

Calcium acetate when dry distilled gives

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Formaldehyde

Acetaldehyde

Acetone

Acetic anhydride

Bleaching action of bleaching powder is due to the liberation of

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O₂

OCI^-

CI₂

CI^-

Wholer prepared urea from

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Ammonia

NH₄CNO

NH₃

Uric acid

The isomers due to the unequal distribution of carbon atoms on either side of the functional group belonging to the same homologous series are called

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Functional isomers

Position isomers

Chain isomers

Metamers

The chemical composition of white lead is

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Na₂CO₃

Pb₃O₄

Pb(OH)₂.2PbCO₃

PbO

At room temperature formaldehyde is

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Gas

Liquid

Solid

None of the above

A cell constant is generally found by measuring the conductivity of aqueous solution of

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BaCl₂

KCl

NaCl

MgCl₂

Which is not a a colligative property?

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Osmotic pressure

Lowering of vapour pressure

Depression of freezing point

Elevation of boiling point

Natural fertilizer provides phosphorus to plants in the form of P₂O₅

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1.2 kg

2.2 kg

3.2 kg

4 kg

Reaction of acids with alcohols is also known as

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Esterification

Saponification

Alkalization

None

What quantity of limestone (CaCO₃) on heating will give 56 kg of CaO?

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1000 kg

56 kg

44 kg

100 kg

A certain current liberate 0.5 g of hydrogen in 2 h. How many grams of copper can be liberated by the same current flowing for the same time in a copper sulphate solution?

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12.7 gm

15.9 gm

31.8 gm

63.5 gm

Dolomite has the composition

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KCL.MgCL₂.6H₂O

Na₃AIF₆

CaCO₃.MgCO₃

CaCL₂.MgCl_2.6H₂O

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