Question # 1

A solution have H+ ions concentration 1 x 10^-7 , its pH will

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Acidic

Basic

Neutral

Zero

The velocity of photon is

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Independent of its wavelength

Depends on its wavelength

Equal to square of its amplitude

Depends on its source

Electrolysis is a process in which a chemical reaction takes place at the expense of

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Chemical energy

Electrical energy

Heat energy

None of these

The commonly used unit of pressure by meteorologists is.

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Atmosphere

Pascal

Milli

Pound inch3

Total pressure of mixture of two gases is.

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The sum of their partial pressures.

The difference of their partial pressures

The product of their practical pressures

The ratio of their partial pressures

The largest number of molecules are present in

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3.6 of H2O

4.6 g of C2H5OH

2.8 g of CO

5.4 g of N2O5

The volume occupied by 1.4 g on N₂at S.T.P is

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2.24 dm³

22.4 dm³

1.12 dm³

112 cm³

Which properties of liquid is measured by polarimeter

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Conductance

Refractive index

Optical activity

Change in volume

Which of the hydrogen halides has the highest percentage of ionic character.

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HF

HBr

HCl

HI

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

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Remains uncharged

Increase four time

Reduce to 1/4

Be doubled

The net heat change in a chemical reaction is same whether it is brought about in two or more different ways in one or several steps. It is known as

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Henry's law

Hess's law

Joule's principle

Law of conservation of energy

Relative lowering of vapour pressure is equal to.

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Mole fraction of solute

Mole fraction of solvent

Mole fraction of solute and solvent

Molality of solution

Which particle have greater wave nature.

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Electron

Proton

Neutron

a particles

The percentage of s characters in sp3 hybrid orbital is.

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25%

33.3%

50%

75%

Critical temperature of CO2 gas is.

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31.1 ^oC

13.1 K

13.1 ^oC

1.31 ^oC

The bond order of N2 molecule is.

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1

2

3

4

Electrode of the lead storage battery are immersed in dilute H2SO4 which has strength by mass

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100%

98%

30%

10%

When water freezes at 0 ^oC, its density decrease due to.

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Cubic structure of ice

Empty spaces present in the structure of ice

Change of bond lengths

Change of bond angles

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