Question # 1

_____________ revolves in orbits around nucleus.

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Electron

Proton

Neutrons

Nil

4th & 5th consist of ________________ elements.

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8

18

32

infinite

Mixture has _________ types.

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3

2

1

No types

How many numbers of moles are equivalent to 8 grams of CO₂?

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0.15

0.18

0.21

0.24

In common, a solution has ___________ components.

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1

2

3

4

________________ elements were discovered in year 1800.

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34

35

36

37

The atomic number of potassium is:

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11

15

18

19

Which one is not a tetraatomic molecular?

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H2O

H2O2

SO3

BCL3

The maximum no.of electrons that can be accommodated in M shell are

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2

8

18

32

In silver plating Anode is made of:

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Gold

Ag

Neon

Nil

Neutrons have _________ charge.

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+

_

No

Nil

Which one is the following belongs no Noble Gases?

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O

F

Ne

Nil

Metals lose their electrons easily because:

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They are electronegative

They have electron affinity

They are electropositive

Good conductors of heat

All chemists invented all except:

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Beakers

Spirit lamp

Funnels

Retorts

Non-metals are generally soft, but which one of the following is extremely hard?

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Graphite

Phosphorus

Iodine

Diamond

The transition temperature of sulphur is:

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96 °C

250 °C

18 °C

218 °C

Atoms form chemical bonds to attain the electronic configuration of

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Halogens

Noble gases

Alkali metals

Alkaline earthmetals

Which of the following can be separated by physical means?

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Mixture

Element

Compound

Radical

Hydrogen is a ____________

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Metal

Non metal

Metalloids

Nil

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