Question # 1

One amu (atomic mass unit) is equivalent to:

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1.66x10^-24 mg

1.66x 10^-24g

1.66x10 g

1.66x10^-23mg

Free radical is a

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Extremely stable

Extremely reactive

Extremely inert

All of these

The number of proton in an atom is called _________ number.

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Molecule

Formula

Atomic

Molar

The valency of nitrogen is

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1

2

3

4

biology bis classified as ___________ science.

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Engineering

Physical

Natural

Chemical

The period of Alchemists extends from _________ AD.

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800 to 1800

600 to 1600

900 to 1900

700 to 1700

There are _________ types of bonds.

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1

2

3

4

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

___________ is a pure substance that can be broken down.

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Matter

Element

Mass

Mixture

The No. of atoms in 1 mole of carbiton is

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6.02 x 1021

6.02 x 1022

6.02 x 1023

6.02 x 1024

Atoms are made of sub _________

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Atoms

Molecules

Charge

Atomic particles

Scientist used ___________ method.

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Scientific

Non-scientific

Bot

Non

The empirical formula of glucose is

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CHO

CH2O

C2HO

CHO2

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