Question # 1

The paper at which separation of solute have been taken place is called.

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Retardation factor

Chromatogram

Base line

Solvent front

A molecular orbital can accommodate maximum electron

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2

6

8

10

Unit of mole fraction is

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mol dm-3

mol kg-1

g dm-3

No unit

During the electrolysis of molten NaCI, the ion which is reduce is

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When liquid water changes to ice its volume expands. The expansion in volume is.

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5%

9%

10%

18%

Le-Chatelier Braun principle is sometimes known as

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Law of mass action

Law of mobile equilibrium

Law of active mass

All of these above

One mole of Carbon -12 has mass

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0.012 kg

1 kg

0.022 kg

12 kg

If the electron in a hydrogen atom drops from n = 6 to n =4 level, the radiation emitted is in which series of lines in the spectrum of atomic hydrogen.

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Lyman

Balmer

Paschen

Brackett

In solvent extraction, solute can be separated from solution, by shaking the solution with solvent in which the solute is.

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More soluble

Partially soluble

Insoluble

soluble at high temp

Which one of the following substances is not amorphous

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Polymer

Rubber

Glass

AgNO₃

I molar volume of a gas at S.T.P is occupied by

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1 g of gas

6 x 10²³g of gas

22.4 m³of gas

1 gram molecular mass of gas

The mass fo 1.505 x 10²³atoms of sulphur is.

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0.5 g

0.6 g

0.7 g

0.8 g

When an atom reacts chemically and loses one or more electrons it is.

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Decomposed

Reduced

Oxidized

Catalyzed

When a chemical reaction is completed.

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Instantaneous rate > average rate

Instantaneous rate = average rate

Instantaneous rate is zero

Both average and instantaneous rates become zero

An aqueous solution of ethanol in water has vapour pressure.

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Equal to that of water

Equal to that of ethanol

More than that of water

Less than that of water

Gases of air, always remains in the random motion and do not settle due to.

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Elastic collision of gas molecules

Unequal number of different gas molecules

Difference impartial pressure of gas molecules

Difference in molecular masses of air gases

The volume of a gas at 0 oC is 273 dm3, the pressure remaining constant. At which temperature its volume will be doubled.

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273 K

273 ^oC

546 ^oC

316 K

Tin has Isotopes

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7

9

11

5

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