Question # 1

When a system is at equilibrium states?

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The concentration of reactants and products becomes equal

The opposing reactions

The rate of the reverse reaction becomes very low

The rates of the forward and reverse reactions becomes equal.

The reaction will attain the equilibrium if:

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Qc<Kc

Qc > Kc

Qc = Kc

Qc = 0

Guldberg and waage out forward law of mass action in:

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1889

1879

1869

1859

Such reactions which continue in both directions are called.

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Irreversible

Reversible

Nonreactive

Dynamic

The forward reaction takes place:

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Right to left

Left to Right

Only to right

Only to left

When a reaction ceases to proceed further , it is called.

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Chemical states

Static state

Physical state

Dynamic equilibrium state

Which colour of HI is ?

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Orange

Purple

Red

Colourless

In the beginning the rate of reverse reaction is

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Negligible

Moderate

Very fast

Slow

Which one of the following statements is not correct about active mass?

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Rate of reaction is directly proportional to activ emass.

Active mass is taken in molar concentration

Active mass is represented by square brackets

Active mass means total mass of substances.

A reverse reaction is that.

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Which proceed from left to high

In which reactants reacts to form products

Which slow down gradually

Which speed up gradually

If Qc = Kc the reaction goes in:

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Forward

Reverse

At equilibrium state

None

If Qc < Kc the reaction goes in:

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Forward

Reverse

At equilibrium state

None

Which chemical is called king of chemicals?

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KNO₃

H₂SO₄

HCl

NHO₃

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