Question # 1

The most abundant element occurring in the oceans is:

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Oxygen

Hydrogen

Nitrogen

Silicon

The symbol of sodium is :

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Sa

Na

Pa

Ca

NaOH is prepared by ____________ of NaCL (aqueous).

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Electrolysis

Decomposition

A & B

Nil

Which one of the following halogen has lowest electronegative?

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fluorine

chlorine

bromine

iodine

The no.of neutrons in deutrium is

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1

2

3

4

____________ solids are arranged in 3 dimension.

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Crystalline

Amorphous

Both

None

The property of being polar in nature is called:

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Polarity

Chemistry

Both

Nil

Which has metallic bond?

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H

Na

HCI

P

During the formation of water from hydrogen and oxygen, which of the following does not occur?

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Hydrogen has oxidized

oxygen has reduced

oxygen gains electrons

hydrogen behaves as oxidizing agent

Density of a gas increases, when its:

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temperature is increased

pressure is increased

volume is kept constant

none of these

Solids are fixed ____________

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Shape

Velocity

Mass

Atoms

"×" & "." Represent:

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Shells

Neutrons

Electrons

Atoms

The bond between two atoms will be ionic if the difference between their electronegativities is:

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Less than 1.7

Greater than 1.7

Zero

Less than 1.2

________________ in linear in shape.

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CO+

CO2

H2O

NH3

Elements are represented by chemical _________

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Abbreviation

Unit

Symbols

It can be represented

In diamonds, carbon are ____________ bonded.

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Tetrahedrally

Single

Double

None

Atoms are arranged in ________________ structure in Bucky balls.

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Hollow

Cage

A & B

Nil

Along the period which one of the following decrease:

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Atomic radius

ionization energy

electron affinity

electronegative

Which one of the following metals burns with a brick red flame?

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Sodium

Magnesium

Iron

Calcium

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