Question # 1

Which chemical is called king of chemicals?

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KNO₃

H₂SO₄

HCl

NHO₃

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

Which type of reactions take place in both directions?

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Addition reactions

Reversible reactions

Irreversibel reactions

Decomposition reactions

Which colour of HI is ?

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Orange

Purple

Red

Colourless

For which reaction Kf is the rate constant?

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Forward reaction

Backward reaction

Upward reaction

Downward reaction

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

At equilibrium state, when reaction cases to proceed, it is called:

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equilibrium constant

dynamic equilibrium

static equilibrium

simple equilibrium

The characteristics of reversible reactions are the following except:

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Products never recombine to form reactants.

They never complete

The proced in both ways

They have a double arrow between reactants and products.

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.

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

We exhale gas in the atmosphere during respiration.

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Carbon dioxide

Oxygen

Nitrogen

Water

Dynamic means, reaction is:

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In forward direction

Stop

In reverse direction

Still continuing.

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