Question # 1

Which types of reaction speed up gradually?

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Irreversible reactions

Reversibel reactions

Forward reactions

Decomposition reactions.

The color of hydrogen Iodide is:

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Colourless

Black

Red

Pink

The forward reaction takes place:

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Right to left

Left to Right

Only to right

Only to left

Equilibrium constant value "K" is equal to:

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Kt / Kr

Ki / Kr

Kc / Qc

Qc /Kc

The plant use

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Carbon di oxide

Oxygen

Nitrogen

Sulphur

For which reaction Kf is the rate constant?

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Forward reaction

Backward reaction

Upward reaction

Downward reaction

Which type of reactions do not go to completion?

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Irreversible reaction

Reversible reactions

Addition reactions

Decomposition reactions

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

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No unit

mol^-2 dm⁶

mol dm³

mol^-2dm

For a reaction between PCL₃ and Cl₂ to form PCl₅ the units of Kc are:

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Mol dm^-3

Mol^-1 dm^-3

Mol^-1dm³

Mol dm³

At dynamic equilibrium:

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The reactions stops to proceed

The amounts of reactants and products are equal

The speed of the forward is reverse reactions are equal

The reaction can no longer be reversed

Dynamic means, reaction is:

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In forward direction

Stop

In reverse direction

Still continuing.

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

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Reactant

Products

Mass

Material

In the beginning the rate of reverse reaction is

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Negligible

Moderate

Very fast

Slow

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

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