Question # 1

Mendeleev periodic table was based upon the:

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electronic configuration

atomic mass

atomic number

completion of a subshell

NaCl + H2O is ____________ solutions.

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Aqueous

Binary

H2O

Nil

1 atm = ?

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1 pascal

760 mm of Hg

1 atm

1 Nm^-2

The shape of H2O is ________________

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Angular

Linear

Triangular

All of above

Which molecule has single covalent bond?

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O₂

N₂

CI₂

CO₂

Which one is an example of colloids?

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NaCl + Solution

Milk

Fog

Air

____________ is an irreversible cell.

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Dry cell

Chargeable cell

Zn cell

None of these

Potassium's atomic no. is :

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17

18

19

20

How many time liquids are denser than gases?

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100 times

1000 times

10,000 times

100,000 times

The earth is made up of ___________ % of calcium.

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4

5

6

7

The isotopes C-12 is present in abundance of:

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96.6%

97.6%

99.7%

None of these

________________ is triangular in shape.

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BCL3

H2O

CO2

NH3

Dissolution in water is due to ____________ bonding.

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Ionic

Covalent

Hydrogen

Nil

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