Question # 1

An atm with stable elecrronic configuration can exist.

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Reacts readily

Can not exist

Independently

Combined form

Chemical bond in O2 is.

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Ionic

Covalent

Metallic

None of these

Valency of nitrogen is

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1

2

3

4

Outermost shell of sodium atom has ...... electrons.

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1

2

3

4

Chemical bond between N2 Molecule is

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Ionic

Single covalent

Double covalent

Triple vocalent

Oxygen is a

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Monoalent element

Divalent element

Trivalent element

Tertravalent element

Which of teh following is cation.

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H2

H2O

CO2

NH+4

How many atoms orm one molecuel of chlorine.

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1

2

3

4

Negatively charged atom or grop of atoms is called.

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Proton

Electron

Anion

Cation

While writing a chemical formula positive ionis written on.

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Right

Left

Center

All of these

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Science 7th Class English Medium Chapter 6 Online Test MCQs With Answers

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