Question # 1

Dipole moment of CO2 is.

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1.25 D

1.85 D

3.1 D

Zero

pH of buffer is calculated by.

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Sorenson equation

Mosley equation

Henderson equation

De broglie equation

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

Vapour pressure of liquid depends upon

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Amount of liquid

Surface area

Temperature

Size of container

The S.I. units for the molar heat capacity are

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Joule Cm^-3degree^-1

Joule deg^-1atm^-1

Joule deg^-1mol^-1

Joule deg^-1kg^-1

Which one of the following molecule have angle of 120 ^o

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Be Cl2

BF3

CH4

NH3

The percentage of s characters in sp3 hybrid orbital is.

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25%

33.3%

50%

75%

Chlorine atom and chloride Cl- ions

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Have same chemical and physical properties

Are allotropes of chlorine

Have same number of electrons

Have same number of proton

The molarity of 2% w/v NaOH solution is

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2

0.25

0.05

0.5

Which of the following molecules have highest bond energy

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F2

Cl2

Br2

I2

One mole of CH₃OH and one mole of C₂H₅OH have

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Equal number of atoms

Equal number of molecules

Equal number of electrons

Equal number of protons

In a group of periodic table, ionization energy.

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Decreases

Increases

Remains same

First increases than increases

Bohr's model of atom is contradicted b y.

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Planck quantum theory

Quantization of energy of electrons

Heisenberg's uncertainty principle

Quantization of angular momentum

Azeotropic mixture can be separated into pure components by

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Distillation

Fractional distillation

Vacuum distillation

None

Drying agent used in crystallization is.

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P2O3

Animal charcoal

KMnO4

Water

The molecules of a gas show more deviation from ideal behaviour at low temperature, because

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Attractive force dominate at low temperature

Kinetic energies are increased

Collisions become less frequent

Densities of the gases increase

Diamond is a bad conductor of electricity because

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It has a tight structure

It has a high density

There are no free electrons present in the crystal of diamond to conduct electronics

None of these

When one mole of each of the following is completely burned in oxygen, which gives the largest mass of carbon dioxide.

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Diamond

C2H6

Methane

CO2

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