Question # 1

When the reaction causes to produced it is called.

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Chemical equlibrium state

Static equilibrium

Dynamic equilibriiun

All

The dynamic equilibrium in irreversible reaction.

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Never establishes

Establishes after completion of reaction

Establishes before completion of reaction

Establishes very soon

When the number of moles of both sides are equal in a reaction then the unit of Kc will be:

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no unit

mol-2 dm6

mol dm3

mo-2 dn

The % age of nitrogen and oxygen in our atmosphere is:

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80

90

95

99

If Qc > Kc the reaction will be in

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Chemical equilibrium

Static equilibrium

Reverse reaction

Forward reaction

In irreversible reaction, dynamic equilibrium:

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Never establishes

Establishes before the completion of reaction

Establishes after the completion of reaction

Establishes readily

The rate of reverse reaction in the beginning.

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Slow

moderate

Very fast

Low

The substances formed during the chemical reaction are called.

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Product

Reactants

Radicals

Element

Which types of reaction speed up gradually?

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Irreversible reactions

Reversibel reactions

Forward reactions

Decomposition reactions.

The forward reaction takes place:

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Right to left

Left to Right

Only to right

Only to left

When the magnitude of Kc is very large it indicates.

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Reaction mixture consist of almost all products.

Reaction mixture consist of almost all reactants.

Reaction has not gone to completion

Reaction mixture has negligible products.

In the beginning the rate of reverse reaction is

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Negligible

Moderate

Very fast

Slow

For which reaction Kf is the rate constant?

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Forward reaction

Backward reaction

Upward reaction

Downward reaction

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Chemistry 10th Class English Medium Unit 9 Online Test MCQs With Answers

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