Question # 1

When the reaction causes to produced it is called.

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Chemical equlibrium state

Static equilibrium

Dynamic equilibriiun

All

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 color of Iodine is:

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Purple

Black

Red

Pink

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

An equilibrium is achievable only in a:

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big system

small system

open system

closed system

The reactions in which products can recombine to form reactants is called.

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Irreversible reactions

Reversible reactions

Direct reactions

Indirect reactions

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

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O₂

CO

CO₂

CO₃

Who proposed "Law of mass action"?

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Newton

Boyle

Guldberg and waage

Lavoisier

Equilibrium constant value "K" is equal to:

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Kt / Kr

Ki / Kr

Kc / Qc

Qc /Kc

The rate of reverse reaction in the beginning.

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Slow

moderate

Very fast

Low

When a reaction ceases to proceed further , it is called.

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Chemical states

Static state

Physical state

Dynamic equilibrium state

Guldberg and waage put forward law of mass action in:

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1860

1869

1870

1879

What is the colour of hydrogen iodide in product?

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Purple

Yellow

Blue

Colorless

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10th Class Chemistry Chapter 9 Chemical Equilibrium English Medium KPK Boards Online Mcqs MCQs With Answers

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