Question # 1

An atom having six electonsin its valence shell will achieve noble gas electronic confguration by

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Gainign one electron

Gaining two electrons

Losing all electrons

Losing two electrons

Macroscopic propertues are properties that can be visualized by

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Telescope

The naked eye

Microscope

Electron microscope

/which of the followign elements is presnt in group IA.

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Lithium

Hydrogen

Sodium

All of these

The electropositive elements have the tendency to

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Lose electrons

Gain electrons

Share electrons

All of these

In the beginning the rate of reverse reaction is.

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Slow

very fast

Moderate

Negligible

Which state of matter has fixed shape and volume?

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Liquid

Solid

Gas

All of these

Formula of Ozone.

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O₂

S₈

CO₂

O₃

The simplist form of matter

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Liquid

Solid

Gas

Both b and c

Which of the following is insoluble salt

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KCl

AgCl

NaCl

CaCl2

How much heat absorbed when NH3decomposed into N2 and H2?

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90.4 kJ/mol

92.4 kJ/mol

94.2 kJ/mol

95.2 kJ/mol

A yellow solid element exists in allotropic forms whic is also present in fossil fuel. Indicate the name

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Iodine

Carbon

Sulphur

Aluminium

Empirical formula of hydrogen peroxide.

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HO

CO

CHO

CH

What information was obtained fom discharge tube expriments?

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Electrons and protons were discovered

Structur eof atom was discovered

Neutrons and protons were discovered

Presence of nucleus in an atom was discovered

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