Question # 1

The pH of 10^-3mol dm^-3of an aqueous solution of H₂SO₄is

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3.0

2.7

2.0

1.5

Oxidation number of Cr in a C₂CrO₄ is

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+2

+4

+6

+8

The number of electrons in one mole of hydrogen gas is.

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6.02 x 10²³

12.04 x 10²³

Only two

Indefinite

Which one of the following has the greater ionic characters in it.

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HF

HCl

H2O

H2

A solution of glucose is 10% to volume in which 1 g mole of it is dissolved will be

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1 dm³

1.8 dm³

200 cm³

900 cm³

Oxidation number of carbon in NaHCO₃

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+4

-6

+6

+2

If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of the gas will

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Remain unchanged

Increase four times

Reduce to 1/4

Be doubled

Which concentration unit is independent of temperature.

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Molarity

Molality

ppm

both a and b

Dipole moment of CO2 is.

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1.25 D

1.85 D

3.1 D

Zero

The nature of bond in diamond is

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Electrovalent

Metallic

Coordinate covalent

Covalent

In order to mention the B.P of water at 110 ^oC the external pressure should be.

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Between 760 torr and 1200 torr

Between 200 torr and 760 torr

765 torr

Any value of pressure

Which pair of molecule have Debye forces in them

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Ar and Ar

Argon and water

Na+ ions and water

water and water

Equal masses of methane and oxygen are mixed in an empty container at 25 ^oC. The fraction of total pressure exerted by oxygen is.

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1/3

8/9

1/9

16/17

Which one of the following substances is used as water absorber in combustion analysis.

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Mg(CIO4)2

50% KOH

Lime water

Dilute solution of NaOH

In which compound the oxidation number of Mw is +6

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KMnO4

K2MnO4

MnO2

MnO

One of the following substances is not used as a drying reagent in a desiccator

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Cons. H₂SO₄

P₂O₅

Silica gel

50% KOH

Chromatography involves the distribution of a solute between.

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Two stationary phases

Two mobile phases

A stationary phase and a mobile phase

Two stationary and two mobile phase.

The real gas obeying Van der Waal's equation will resemble ideal gas is.

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both 'a' and 'b' are large

both 'a' and 'b' and small

'a' is small and 'b' is large

'a' is large and 'b' is small

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