Question # 1

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

Equilibrium constant value "K" is equal to:

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Kt / Kr

Ki / Kr

Kc / Qc

Qc /Kc

The substances formed during the chemical reaction are called.

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Product

Reactants

Radicals

Element

A complete reaction is one is which.

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All the reactants convert into products.

All the reactants do not convert into products.

Half reactants convert into products.

Only 10% reactants convert into products.

The major components of Atmosphere are:

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Carbon and Nitrogen

Nitrogen and Oxygen

Oxygen and Chlorine

None of these

Guldberg and waage put forward law of mass action in:

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1860

1869

1870

1879

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

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

The forward reaction takes place:

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Right to left

Left to Right

Only to right

Only to left

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.

If Qc < Kc the reaction goes in:

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Forward

Reverse

At equilibrium state

None

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.

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