Question # 1

The vapour pressure of a liquid increase with the:

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increase pressure

increase of temperature

increase of intermolecular forces

increase of polarity of molecules

In ionic bond complete ________________ of electrons occurs.

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Paring

Sharing

Transfer

None

Every system in the universe tends to lower its energy to attain ________________

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Freedom

Flow

Stability

Nil

Which one is strong electrolyte ?

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NH4OH

NaOH

a & b

Nil

The example of solid solute in gas solvent is

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butter

Sugar in water

Smoke in air

Opals

________________ are formed from chemical reactions.

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Elements

Mixture

Substance

Nil

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

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2

8

18

32

4th & 5th consist of ________________ elements.

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8

18

32

infinite

A _________ is a pure substance is made up of two or more elements.

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Mixture

Elements

Solution

Compound

Brine is an aqueous solution of

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NaCI

NaOH

AgNO3

CaO

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

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0.15

0.18

0.21

0.24

_________ elements naturally occurring.

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92

118

93

117

________________ elements were discovered in year 1800.

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34

35

36

37

Which one of the following is liquid in solid solution?

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sugar in water

butter

opal

fog

The shape of H2O is ________________

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Angular

Linear

Triangular

All of above

In a discharge tube, the pressure of a gas is kept at

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10-2 atm

10-4 atm

10-6 atm

10-8 atm

Which has biger particles?

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Solutions

Colloids

Suspensions

True solutions

Intermolecular forces are of three types and are collectively called ____________

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Nelson' forces

Vander Waal's forces

Neurons

Nil

The no. of electrons in the valence shell of alkali metals is

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1

2

4

7

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