Question # 1

Sort out a compound from the following

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Air

Salt

Ice-cream

Iron

Potassium's atomic no. is :

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17

18

19

20

The modern periodic table is based on:

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Atomic number

Mass number

Relative mass

Nil

If the solute-solute forces are strong enough than those of solute- solvent force, The solute:

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dissolves readily

does not dissolve

dissolve slowly

dissolves and precipitates

Which of the following is less malleable?

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Sodium

Iron

Gold

Sliver

Which one is not a tetraatomic molecular?

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H2O

H2O2

SO3

BCL3

Gases have fixed ____________

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Shape

Volume

Area

Nil

............... periodic table consist of group & periods.

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Bohr

Rutherford

Mendeleev's

Nil

Following are elements of 2nd period.Which atom is bigger in size?

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Li

Be

B

C

Tyndall effect is shown by:

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sugar solution

paints

jelly

chalk solution

Mist is an example of solution:

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liquid in gas

gas in liquid

solid gas

gas in solid

Which is an acceptor molecule/ion?

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N₂

O₂

H⁺

CH₄

CO2 the oxidation number of C =.

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+1

+2

+3

+4

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