Question # 1

Thousand of amino acids polymerize to form.

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Carbohydrates

Proteins

Lipids

Vitamins

Who proved that the presence of hydrogen as the main constituent of all acids.

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Lavoisier

Humphrey Davy

Dalton

Arrhenius

Which acid used for food preservation?

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H₂SO₄

HNO₃

HCl

CH₃COOH

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.

The envelope of different gases around the earth is called.

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Atmosphere

Brosphere

Lithosphere

Hydrosphere

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

When the rate of a the forward reaction takes place at the rate of reverse reaction the composition of the reaction mixture remains constant it is called.

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Chemical equilibrium

Dynamic equilibrium

Static equilibrium

All

Equilibrium constant has no unit when number of moles of reactants and products are:

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same

Different

Both a and b

None of these

Which one of the not metal.

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Copper

Carbon

chromium

Iron

Citric acid is present in

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Citrus fruits

Sour milk

Rancid butter

Apple

Wood contain the amount of carbon.

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70%

80%

60%

40%

Molecular formula of butane is

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C₄H₈

C₄H₁₀

C₄H₁₂

C₄H₆

In a chemical reaction, the substance that combine are called.

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Reactant

Products

Mass

Material

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10th Class Chemistry English Medium KPK Boards Online Mcqs MCQs With Answers

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