Question # 1

Such reationsin which reactants and products are sufficient in quantities the Kc value of equilibrium state will be

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Very small

Very large

Moderate

None of these

The reaction in which the products do not recombine to form reactants are called.

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Inversible reactions

Reversible reaction

Decomposition

Addition

The unit of molar concentration:

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mol. dm^-2

mol. dm^-1

mol. dm

mol. dm^-3

If Qc = Kc the reaction goes in:

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Forward

Reverse

At equilibrium state

None

At dynamic equilibrium:

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The reactions stops to proceed

The amounts of reactants and products are equal

The speed of the forward is reverse reactions are equal

The reaction can no longer be reversed

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

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Reversible reaction

Irreversible reaction

Decomposition

Addition

In the beginning the rate of reverse reaction is

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Negligible

Moderate

Very fast

Slow

The color of hydrogen Iodide is:

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Colourless

Black

Red

Pink

In chemical reaction , the substances that combine are called.

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Reactants

Products

Equlibrium

Numerator

For which reaction Kf is the rate constant?

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Forward reaction

Backward reaction

Upward reaction

Downward reaction

What is the colour of hydrogen iodide in product?

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Purple

Yellow

Blue

Colorless

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

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O₂

CO

CO₂

CO₃

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