Question # 1

In the beginning the rate of reverse reaction is

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Negligible

Moderate

Very fast

Slow

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

Guldberg and waage put forward law of mass action in:

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1860

1869

1870

1879

If Qc > Kc the reaction will be in

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Chemical equilibrium

Static equilibrium

Reverse reaction

Forward reaction

Which types of reaction speed up gradually?

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Irreversible reactions

Reversibel reactions

Forward reactions

Decomposition reactions.

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.

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

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O₂

CO

CO₂

CO₃

For a reaction between PCL₃ and Cl₂ to form PCl₅ the units of Kc are:

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Mol dm^-3

Mol^-1 dm^-3

Mol^-1dm³

Mol dm³

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

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80

90

95

99

K_c is always equal to

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Rf/Rr

Kf /Kt

Kf/Kr

Rr/Rt

If Qc < Kc the reaction goes in:

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Forward

Reverse

At equilibrium state

None

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

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