Question # 1

The isotopes of an element have different number of

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Electrons

Protons

Neutrons

Protons & Neutrons

The value of Avogadro 'no is:

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6.023×1024

6.023×1026

6.023×1023

6.023×1020

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

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Mixture

Elements

Solution

Compound

Which one of the following is an electron deficient molecule?

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HN₃

BF₃

N₂

O₂

The amount of energy given out when an electron is added to any atom is called:

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lattice energy

ionization energy

electronegative

electron affinity

Which one of the following is the weakest force among the atom?

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ionic force

metallic force

intermolecular force

covalent force

Atoms are arranged in ________________ structure in Bucky balls.

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Hollow

Cage

A & B

Nil

Which one of the following is not an electrolyte?

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sugar solution

sulphuric acid solution

Lime solution

Sodium chloride solution

Fog is an example of ____________ in gas.

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Solid

Liquid

Gas

Plasma

positive ion hare formed by _________ of electrons.

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Gain

Loss

Sharing

Bonding

The base of modern periodic table is

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Atomic number (Z)

Mass number (A)

Avogadro's Number

Quantum Number

____________ cell is made of two half of cells.

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Zinc cell

Galvanic

Both

All

All electrolytes are:

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Conductor

Insulator

Semi conductor

Nil

Electron ________________ energy when they jump from low to higher level.

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Absorb

Radiate

Nothing

Nil

It is a strong electrolyte

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H2O

CH3COOH

NaOH

C6H6

A heterogeneous mixture of different substance are called:

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Solution

Suspension

Colloids

Nil

All metals are solid at ________________ temperature.

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Room

High

Low

None

________________ cannot be seen by naked eye.

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Matter

Molecules

Solid

Liquids

Energy of a shell is ________________

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Variable

Constant

Cannot be changed

Nil

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