Question # 1

Scientist used ___________ method.

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Scientific

Non-scientific

Bot

Non

Electron ________________ energy when they jump from low to higher level.

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Absorb

Radiate

Nothing

Nil

Which is used for industrial manufacture of NaCI?

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Daniel cell

Down's cell

Nelson's cell

None of these

The smallest under of an ionic compound is

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Atom

Formula unit

Ion

Molecule

Bucky balls was discovered in ________________

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1965

1975

1985

1995

In period, ionization energy of elements

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Increases

Decreases

Remains constant

None of these

Which of the following can accommodate 18 electrons?

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K

L

M

N

How many covalent bond does C₂H₂ molecule have?

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two

three

four

five

Oxidation means

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Gain of oxygen

Removal of oxygen

Gain of hydrogen

Gain of electrons

_________ shells of noble gases is complete.

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Outer most

2

1

Nil

An atom having six electrons in its achieve noble electronic configuration by:

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gaining one electron

losing all electrons

gaining two electrons

losing two electrons

In common, a solution has ___________ components.

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1

2

3

4

Which one of the following does not affect the boiling point?

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intermolecular forces

external pressure

nature of liquid

initial temperature of liquid

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