Question # 1

An equilibrium is achievable only in a:

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big system

small system

open system

closed system

Which types of reaction speed up gradually?

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Irreversible reactions

Reversibel reactions

Forward reactions

Decomposition reactions.

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 reaction ceases to proceed further , it is called.

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Chemical states

Static state

Physical state

Dynamic equilibrium state

The substances formed during the chemical reaction are called.

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Product

Reactants

Radicals

Element

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

A reverse reaction is that.

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Which proceed from left to high

In which reactants reacts to form products

Which slow down gradually

Which speed up gradually

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 forward reaction takes place:

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Right to left

Left to Right

Only to right

Only to left

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

Dynamic means, reaction is:

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In forward direction

Stop

In reverse direction

Still continuing.

The rate of reverse reaction in the beginning.

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Slow

moderate

Very fast

Low

In chemical reaction , the substances that combine are called.

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Reactants

Products

Equlibrium

Numerator

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