Question # 1

Electrons carry _________ charge.

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+

_

Neutral

Bouble Positive

____________ cell is made of two half of cells.

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Zinc cell

Galvanic

Both

All

Oxidation means

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Gain of oxygen

Removal of oxygen

Gain of hydrogen

Gain of electrons

The period of Alchemists extends from _________ AD.

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800 to 1800

600 to 1600

900 to 1900

700 to 1700

positive ion hare formed by _________ of electrons.

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Gain

Loss

Sharing

Bonding

All ionic compound are ________________ at room temperature.

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Liquid

Solids

Gas

Plasma

________________ elements were discovered in year 1800.

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34

35

36

37

How many number of electrons take part in triple covalent bond?

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2

4

6

8

"Atoms" means _________

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Divisible

Indivisible

Break

Nil

Which one of the following metals burns with a brick red flame?

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Sodium

Magnesium

Iron

Calcium

Neuron was discovered by

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Sir Willium Crooks

Goldstein

James Chadwik

Neil Bohr

At ____________ °C water converts to ice.

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101°

100°

99°C

100.2°C

The number of isotopes of carbon are

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1

2

3

5

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