Question # 1

A solution whose molarity is known is called:

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Dilute solution

Concentrated solution

Saturated solution

Molar solution

The reaction of ionic compound is very ________________ in solution.

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Slow

Fast

Medium

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

Free radical is a

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Extremely stable

Extremely reactive

Extremely inert

All of these

The boiling point of H2O is:

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100

12

1.105

9

The core of the earth is mostly made from ____________

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Nickel

Iron

A % B

Copper

One mole of sodium = ______ .

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24 g

25 g

26 g

23 g

Bronze (alloy) is a ____________

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Slolution

Mixture

a & b

Nil

The atomic radil of the elements in periodic table:

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increase form left to right in period

increase form top to bottom

do not change form left to right in period

decrease form top to bottom in a group

Mark the incorrect statement about ionization energy:

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it is measured in Kjmol^-1

it is absorption of energy

it decreases in period

it decreases in a group

Tyndall effect is due to:

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block of beam of light

non - scattering of beam of light

scattering of beam of light

passing through beam of light

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

The third abundant as found in the earth' crust is:

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Carbon monoxide

Oxygen

Nitrogen

Argon

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