Question # 1

Causticisation process is used for the preparation of

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Caustic soda

Caustic potash

Baryata solution

Slaked lime

Phosphorus pentoxide finds use as

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An oxidizing agent

A reducing agent

a bleaching agent

A dehydration agent.

The kinetic theory of gases predicts that total kinetic energy of a gaseous assemble depends on

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Pressure of the gas

Temperature of the gas

Volume of the gas

Pressure, temperature, and volume of the gas.

Which has largest radius?

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CO³⁺

Mn³⁺

Fe³⁺

Cr³⁺

The vapour density of a gas is 11.2. The volume occupied by 11.2 g of this gas at N.T.P. is

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22.4 litres

11.2 litres

1 litre

2.24 litres

When quantity of electricity passed is one faraday then the mass deposited at the electrode is equal to

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One gm. atomic weight

One gm. equivalent weight

Electrochemical equivalent

None of the above

The order of reactivity of halogens in aliphatic substitution reactions is

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Br2 > C12 > F2

Cl2 > Br2 > F2

Cl2 C12 > Br2

F2 > Br2 > C12

As a fixing agent in photography, sodium thisoulphate is used for

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Dissolving out unreacted silver bromide

Converting silver halides to metallic silver

Reducing solubility of AgBr

Preventing overdeveloping and fogging.

Salol is prepared from

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Salicyclic acid and phenol

Salicyclic acid and methyl alcohol.

Both

None

The number of oxygen atoms in 4.4 g of CO₂is approximately

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1.2 x 10²³

6 x 10²²

6 x 10²³

12 x 10²³

Which species represents the electrpohile in aromatic nitrotaion?

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NO^-₂

NO⁺₂

NO2

NO^-₃

Which of the following has least mass?

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2 gram atom of nitrogen

3 x 10²³atoms of C

1 mole of S

7.0 g of Ag.

Which one is primary alcohol?

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Buten-2-ol

Propan-2-ol

Butaon-1-ol

2, 3-Dimethylhexane-4-ol

Which of the substances Na, Hg, S, Pt and graphite 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

According to MO theory, the species O⁺₂

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Bond order of 2.5

Three unpaired electrons

Diamagnetic character

Stability lower then O₂

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