Question # 1

In irreversible reaction, dynamic equilibrium:

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Never establishes

Establishes before the completion of reaction

Establishes after the completion of reaction

Establishes readily

Which chemical is called king of chemicals?

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KNO₃

H₂SO₄

HCl

NHO₃

The plant use

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Carbon di oxide

Oxygen

Nitrogen

Sulphur

The major components of Atmosphere are:

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Carbon and Nitrogen

Nitrogen and Oxygen

Oxygen and Chlorine

None of these

When CaCO_3,.is heated in an open flask, it decomposes to form calcium oxides and .

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O₂

CO

CO₂

CO₃

The reaction in which the products can recombine to form reactants are called.

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Reversible reaction

Irreversible reaction

Decomposition

Addition

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

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Chemical states

Static state

Physical state

Dynamic equilibrium state

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

The value of equilibrium constant (Kc) depends only on:

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temperature

Pressure

concentration

density

When the magnitude of Kc is very large in indicates.

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Reaction never go to completion

Reaction is in equilibrium state

Reaction will complete after some time

Reaction has almost to completion

The % age of nitrogen and oxygen in our atmosphere is:

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80

90

95

99

The forward reaction takes place:

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Right to left

Left to Right

Only to right

Only to left

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.

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