Question # 1

Water, carbon dioxide, ammonia and methane are examples of.

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Atoms

Elements

Compounds

Mixture

Which one of the following is a metalloid element.

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Gold

Boron

Silver

Nitrogen

Which one of the following is an element.

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O3

CO2

CH4

H2O

Number of the neutrons in helium element.

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1

2

3

4

How many hydrgen atos are present in 1 molecule of ammonia.

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1

2

3

4

C6H12O6is he formula of glucose. How many oxygen are there in one molecule of glucose.

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3

6

9

12

Choose an atom which can-exist idenpendently at room temperature.

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Na

O

Ne

Cu

Which of the following state has specific shape and volume.

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Gas

Solid

Liquid

Both a and b

The symbol of Lithum is.

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He

Li

Ne

Lu

Matter exist in

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Solid

Liquid

gas

All of these

Which one of the following is a non metallic element.

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Oxygen

Aluminium

Iron

Beryllium

The subatomic particles of an atom are.

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Proton

Electron

Neutron

All of these

How many atoms are present in one molecule of helium.

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1

2

3

4

Which of the following gas is used by plants for making food.

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Hydrogen

Oxygen

Nitrogen

Carbon dioxide

Which one of the following is metallic element.

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Hydrogen

Helium

Lithium

Carbon

The number of proton present in atom is called.

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Atomic number

Atomic mass

Atomic weight

Mass

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