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Chemistry 10th Class English Medium Unit 9 Online Test MCQs With Answers

Question # 1

When the magnitude of Kc is very small in indicates.

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Equilibrium will never establish

All reactants will converted to products.

Reaction will go to completion

The amount of products is negligible

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Question # 2

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.

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Question # 3

when a system is in equilibrium state or in dynamic equilibrium state.

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Reactants and product are equal

Forward reactions stops

Reverse reactions stops

Forward reaction rate and reverse reaction rate

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Question # 4

When the reaction causes to produced it is called.

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Chemical equlibrium state

Static equilibrium

Dynamic equilibriiun

All

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Question # 5

The substance formed during the chemical reaction are called.

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Products

Reactants

Radical

Element

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Question # 6

The lives of aquatic plants and animals are indirectly related to concentration of dissolved ------ in water:

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hydrogen

oxygen

chlorine

nitrogen

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Question # 7

K_c is always equal to

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Rf/Rr

Kf /Kt

Kf/Kr

Rr/Rt

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Question # 8

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

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equilibrium constant

dynamic equilibrium

static equilibrium

simple equilibrium

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Question # 9

The forward reaction takes place:

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Right to left

Left to Right

Only to right

Only to left

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