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

Question # 1

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

Choose an answer

no unit

mol-2 dm6

mol dm3

mo-2 dn

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Question # 2

The reactions in which products can recombine to form reactants is called.

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Irreversible reactions

Reversible reactions

Direct reactions

Indirect reactions

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Question # 3

Dynamic means, reaction is:

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In forward direction

Stop

In reverse direction

Still continuing.

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Question # 4

When the numbers of moles of both sides are equal in a reaction, then the unit of K_c will be:

Choose an answer

No unit

mol^-2 dm⁶

mol dm³

mol^-2dm

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Question # 5

Equilibrium constant has no unit when number of moles of reactants and products are:

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same

Different

Both a and b

None of these

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Question # 6

What is the colour of hydrogen iodide in product?

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Purple

Yellow

Blue

Colorless

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Question # 7

If Qc = Kc the reaction goes in:

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Forward

Reverse

At equilibrium state

None

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Question # 8

In a chemical reaction, the substance that combine are called.

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Reactant

Products

Mass

Material

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Question # 9

At dynamic equilibrium state:

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Rate of forward reaction≠ Rate of reverse reaction

Rate of forward reaction > Rate of reverse reaction

Rate of forward reaction = Rate of reverse reaction

Rate of forward reaction < rate of reverse reaction

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Question # 10

The two major components of atmosphere are:

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Hydrogen and oxygen

Nitrogen and Hydrogen

Nitrogen and oxygen

Oxygen and water.

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Question # 11

The color of Iodine is:

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Purple

Black

Red

Pink

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Question # 12

The reaction in which the number of moles reactants and products not equal in balance chemical equation the units of Kc for this reactions are

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mol^-2

dm³

mol²

mol dm^-1

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