Chemistry class ix notes 9th class board pattern model paper
Chap-4 Structure of molecule Important questions, if you attempt these question you will get InshaAllah 100% marks.
Chap-5 Physical state of matter
Objective
Part
Choose the right option. 10×1=10
|
|
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A
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B
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C
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D
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1
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The vapour pressure of a liquid
increases with the;
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Increase of pressure
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Increase of
temperature
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Increase of
intermolecular forces
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Increase of polarity
of molecule
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2
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One atmospheric pressure is equal
to how many pascals:
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101325
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10325
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106075
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10523
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3
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Diffusion is more rapid in
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Liquid
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Solid
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Gases
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None of above
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4
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The existence of solid in
different physical form is called:
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Crystals
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Allotropy
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Evaporation
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Transition
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5
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Boiling points depend upon the
nature of:
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Liquid
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Intermolecular forces
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External pressure
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All of these
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6
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_______ are highly mobile and
they can be compressed
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Solid
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Liquid
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Gases
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None of these
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7
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Which one of the following is not
amorphous
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Rubber
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Plastic
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Glass
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Glucose
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8
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Mass per unit volume is called:
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Pressure
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Temperature
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Density
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Solubility
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9
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Gases exert pressure ______ in
all direction.
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Randomly
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Uniformly
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Alternate
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Constantly
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10
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Which one of the following gas
diffuses faster?
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Hydrogen
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Helium
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Fluorine
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Chlorine
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Subjective
Answer the short
questions 10×2=20
1. Define
diffusion. Explain with example.
2. What
is absolute zero, give its value.
3. Define
the term allotropy with examples.
4. Define
standard atmospheric pressure. What is its unit?
5. Why
the rate of diffusion of gases is rapid than that of liquids?
6. Define
Boyle’s law.
7. Which
form of sulphur exists at room temperature?
8. Define
freezing point.
9. What
are crystalline solid?
10. Define
vapour pressure.
Long
Questions 5×1=5
1. (a)
Define boiling point. How it is affected by different factors? 3
(b) A gas occupies a volume of
800cm3 at 1atm, when it is allowed to expand to 1200cm3.
What will be its pressure in mm of Hg? 2