Question # 1

Guldberg and waage put forward law of mass action in:

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1860

1869

1870

1879

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

Such reaction which can be made proceed in either direction depending upon the condition:

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simple reaction

reversible reaction

irreversible reaction

chain reaction

Which colour of HI is ?

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Orange

Purple

Red

Colourless

The substance formed during the chemical reaction are called.

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Products

Reactants

Radical

Element

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 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.

Which types of reaction speed up gradually?

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Irreversible reactions

Reversibel reactions

Forward reactions

Decomposition reactions.

Formation profess of Ammonia by the combination Hydrogen and Nitrogen was given by:

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Dalton

Thomson

Haber

Waage

The value of K_c depends on.

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Temperature

Pressure

Volume

Atmosphere

when a system is in equilibrium state or in dynamic equilibrium state.

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Reactants and product are equal

Forward reactions stops

Reverse reactions stops

Forward reaction rate and reverse reaction rate

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

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80

90

95

99

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