Question # 1

positive ion hare formed by _________ of electrons.

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Gain

Loss

Sharing

Bonding

The value of Avogadro 'no is:

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6.023×1024

6.023×1026

6.023×1023

6.023×1020

Which one is largest?

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Exo

Peta

Atto

Pico

Which one of the following element is found in most abundance in the earth's crust?

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Oxygen

Aluminum

Silicon

Iron

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

Free radical is a

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Extremely stable

Extremely reactive

Extremely inert

All of these

O3, Ozone is _________ molecules.

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Homoatomic

Hetroatomic

Monoatomic

Nil

The fundamental unit of elements is ___________

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Molecule

Atom

Matter

Mixture

_________ shells of noble gases is complete.

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Outer most

2

1

Nil

Amadeo Avogadro was a _______________ scientist.

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Italian

English

Greek

Russian

Elements are represented by chemical _________

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Abbreviation

Unit

Symbols

It can be represented

The most abundant element occurring in the oceans is:

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Oxygen

Hydrogen

Nitrogen

Silicon

It is heterogeneous mixture

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Sand

Milk

Air

Brass

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9th Class Chemistry Chapter 1 Fundamentals of Chemsitry English Medium KPK Boards Online Mcqs MCQs With Answers

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