Question # 1

For reactions having large Kc value, the reaction proceeds to:

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Completion

Equilibrium state

back ward

None of these

The lives of aquatic plants and animals are indirectly related to concentration of dissolved ------ in water:

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hydrogen

oxygen

chlorine

nitrogen

In chemical reaction , the substances that combine are called.

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Reactants

Products

Equlibrium

Numerator

Reactions which have comparable amounts of reactants and products at equilibrium state have:

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very small Kc value

Very large Kc value

Moderate Kc value

None of these

At equilibrium state there are possibilities: OR types of chemical equilibrium are.

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1

2

3

4

The two major components of atmosphere are:

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Hydrogen and oxygen

Nitrogen and Hydrogen

Nitrogen and oxygen

Oxygen and water.

Equilibrium constant value "K" is equal to:

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Kt / Kr

Ki / Kr

Kc / Qc

Qc /Kc

The rate of reverse reaction in the beginning.

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Slow

moderate

Very fast

Low

In a Reversible Reaction if Qc = Kc then.

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Reaction is occuring in forward direction

Reaction is occuring in Reverse direction

Equilibrium has been allained

Reaction is not at equilibrium

Active mass is expressed as:

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{ }

[ ]

( )

l l

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 reaction causes to produced it is called.

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Chemical equlibrium state

Static equilibrium

Dynamic equilibriiun

All

What is the colour of hydrogen iodide in product?

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Purple

Yellow

Blue

Colorless

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

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