Question # 1

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

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1

2

4

7

All of the following are tri-atomic molecules except:

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H²

O³

H²O

CO²

"Atoms" means _________

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Divisible

Indivisible

Break

Nil

Graphite is ___________

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Hard

Nil

Soft

Nil

A bond formed between two non-metals is expected to be:

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covalent

ionic

coordinate covalent

metallic

The isotopes C-12 is present in abundance of:

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96.6%

97.6%

99.7%

None of these

First energy level is denoted by:

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K

L

M

N

Which one of the following pair has the same mass?

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1 mole of CO and 1 mole of N₂

1 mole of CO and 1 mole of CO₂

1 mole of O₂ and 1 mole of N₂

1 mole of O₂ and 1 mole of CO₂

________________ in linear in shape.

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CO+

CO2

H2O

NH3

Amadeo Avogadro was a _______________ scientist.

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Italian

English

Greek

Russian

The equation of relationship between atomic number (Z) and mass number (A) is

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A = Z + N

A = Z - n

A = Z

A =2Z + n

Sodium is exterminate reactive metal, but it does not react with:

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Hydrogen

Nitrogen

Sulphur

Phosphorus

The metallic plates through which electrons enters and leaves electrolytes:

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Wires

Electrodes

Both

Nil

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