Question # 1

Which one is not a tetraatomic molecular?

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H2O

H2O2

SO3

BCL3

All metals are solid at ________________ temperature.

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Room

High

Low

None

Along the period which one of the following decrease:

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Atomic radius

ionization energy

electron affinity

electronegative

An ________________ scientist arranged the elements in order in periodic table.

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English

Italian

African

Indian

the homogeneous mixture of two or more substances is ____________.

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Solution

Stronger

Suspension

None

Number of protons+ neutrons is :

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Atomic mass

Mass numbers

Both

Nil

Free radical is a

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Extremely stable

Extremely reactive

Extremely inert

All of these

A _________ is a pure substance is made up of two or more elements.

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Mixture

Elements

Solution

Compound

The atomic number is represented by ____________

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A

Y

X

Z

When an electronegative element combines electropositive element the type of bonding is

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covalent

ionic

polar covalent

coordinate covalent

Mass no is represented by :

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A

B

C

D

The cathode of Nelson's cell is made up of

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C

Zn

Cu

Fe

____________ used to remove nail polish.

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Acetyline

Acetone

H2O

Nil

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