Question # 1

The symbol of barium is:

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Ba

Bi

Br

B

Mass no is represented by :

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A

B

C

D

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

Na__ Na++ e , what type of ionit is :

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Positive

Negative

Neutral

Charged

There are _________ elements found till now .

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120

118

119

117

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

positive ion hare formed by _________ of electrons.

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Gain

Loss

Sharing

Bonding

biology bis classified as ___________ science.

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Engineering

Physical

Natural

Chemical

All chemists invented all except:

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Beakers

Spirit lamp

Funnels

Retorts

___________ is a pure substance that can be broken down.

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Matter

Element

Mass

Mixture

The smallest under of an ionic compound is

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Atom

Formula unit

Ion

Molecule

Which one is largest?

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Exo

Peta

Atto

Pico

The study of hydrocarbons and their derived compounds is called

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Physical chemistry

Inorganic chemistry

Organic chemistry

Biochemistry

In volvox asexual cell produced:

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Daughter colonies

Sperm

Egg

All

Atoms are made of sub _________

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Atoms

Molecules

Charge

Atomic particles

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