Question # 1

The rate of reaction determined at any given time is called.

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Average rate

Instantaneous rate

Spontaneous rate

Over all rate

Allotropy is the property of.

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Compound

Element

Atom

Mixtuer

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

What are the SI units of Van der Waal constant 'a'

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atm dm3 mol-2

atm dm6 mol-2

Nm4 mol-2

Nm mol-1

Cadmium has isotopes.

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3

4

5

9

Which of the following wave properties is inversely proportional to the energy for electromagnetic radiations

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Frequency

Wave number

Velocity

Wave length

The Number of moles of CO2 which contain 8.0 of oxygen.

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0.25

0.15

0.35

1.45

The sum of all kinds of energies of atoms, ions or molecules of a system is known as.

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Kinetic energy

Potential energy

Internal energy

Solar energy

In silver oxide battery, the cathode is mad up of.

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AgO

Ag2O

Ag2O3

Ag

The net change in a chemical reaction is same whether it takes place directly or indirectly is

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Henry's law

Charles's

Hess's lass

Graham's law

The drying agents used in desiccator is.

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BeCl2

MgCl2

CaCl2

SrCl2

Lyman series lie in

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Ultraviolet region

Visible region

Infrared region

Radio waves region

If four moles of sulphur dioxide are oxidized to sulphur trioxide, how many moles of oxygen are needed.

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0.5

1.0

1.5

2.0

The paramagnetic behaviour of oxygen is well explaned on the basis of.

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M.O Theory

N.B Theory

VSEPR Theory

CF theory

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

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HF

HCl

H2O

H2

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

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Molarity

Molality

Mole fraction of solvent

Mole fraction of solute

For which system does the equilibrium constant K_chas units of (concentration)^-1

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the volume occupied by 1.4 of N2 at S.T.P is

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2.24 dm3

22.4 dm3

1.12 dm3

112 cm3

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