Question # 1

The pH of human blood is

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7.0

7.4

4.0

6.5

If the volumes of reactants and products are same in a gaseous phase reaction, then the equilibrium state is not affected by

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Change of temperature

Change of pressure

Change of concentration

Catalyst

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

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

The value of Rydberg constant is.

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1.6 x 10⁷ m-1

1.9768 x 10⁷ m-1

1.09678 x 10⁷ m-1

1.7904 x 10⁷ m-1

The relationship between K_pand K_cis given by

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When a chemical reaction is completed the

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Instantaneous rate > average rate

Instantaneous rate = average rate

Instantaneous rate is zero

Both average and instantaneous rates become zero

Which of the following molecule obey octet rule.

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BF3

BCl3

NH2

SF6

The pressure of oxygen inside the bomb calorimeter is.

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100 atm

50 atm

25 atm

20 atm

The heat contents of the system of known as.

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Entropy

Enthalpy

Work

Free energy

Solvent extraction is an equilibrium process and it is controlled by.

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Law of mass action

The amount of solvent used

Distribution law

The amount of solute

A pressure cooker reduces cooking time because.

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Heat is uniformly distributed

Boiling point of water rises

A large flame is used

Vapour pressure of liquid reduces

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

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100%

98%

30%

10%

Several types of filter media are used for filtration depending on

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Natural of reactants

Nature of reaction

Size of precipitate

Nature of filter paper

Tin has isotopes.

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9

10

11

12

How many electrons can be accommodated in sub shell for which n = 3, l = 1

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6

8

18

32

Orbitals having same energy are called

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Hybird orbitals

Valence orbitals

Degenerate orbitals

D-orbitals

Which one of the following process is endothermic

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condensation of steam

Freezing of water

electrolysis of water

None of these

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