Question # 1

1 torr = ?

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1 mm of Hg

1 atm

760 mm of Hg

1 pascal

The vapour pressure of a liquid increase with the:

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increase pressure

increase of temperature

increase of intermolecular forces

increase of polarity of molecules

Nelson's cells used to prepare caustic soda along with gases. Which of the following gas is produced at cathode?

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CI₂

H₂

O₃

O₂

Oxidation means

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Gain of oxygen

Removal of oxygen

Gain of hydrogen

Gain of electrons

Energy of a shell is ________________

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Variable

Constant

Cannot be changed

Nil

The most common example of corrosion is:

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Chemical decay

Rusting of iron

Rusting of aluminum

Rusting of tin

Which of the following does not affect solubility?

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Temperature

Pressure

Nature OF SOLVENT

Area

............... periodic table consist of group & periods.

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Bohr

Rutherford

Mendeleev's

Nil

Which has metallic bond?

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H

Na

HCI

P

During the formation of water from hydrogen and oxygen, which of the following does not occur?

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Hydrogen has oxidized

oxygen has reduced

oxygen gains electrons

hydrogen behaves as oxidizing agent

Which one is moderate reactive metal?

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Pb

Na

Ca

Mg

Gold was used for utensils as early as ____________ BC.

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3400

3500

3600

3700

Sodium is exterminate reactive metal, but it does not react with:

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Hydrogen

Nitrogen

Sulphur

Phosphorus

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