Question # 1

"×" & "." Represent:

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Shells

Neutrons

Electrons

Atoms

Which one is not a property of electrolytic cell?

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It consists of one complete cell

Anode has +ve charge

It converts electrical energy into chemical one

Anode has -ve charge

________________ solids are hard.

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Ionic

Covalent

Coordinate

Nil

Th name of chemist who arranged all the elements in the periodic tale is :

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J.Newlands

Columb

Einstine

None of these

The concept of orbit was used by:

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J.J Thomson

Rutherford

Bohr

Planck

Electrons carry _________ charge.

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+

_

Neutral

Bouble Positive

105 elements were discovered by the year ________________

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1984

1974

1086

1996

Copper extracted from its ore is ____________ % pure.

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98%

99%

96%

Nil

Intermolecular forces are of three types and are collectively called ____________

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Nelson' forces

Vander Waal's forces

Neurons

Nil

CO2 the oxidation number of C =.

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+1

+2

+3

+4

Which one of the following is brittle?

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Sodium

Aluminum

Selenium

Magnesium

Suspension's solute particles ____________ at bottom.

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Dissolves

Settle

Both

Nil

Es is symbol of :

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Erbium

Einsteinium

Europium

Fremium

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