Class 9th Chapter 1
mohsin khan Class 9th Chapter 1
Matter in our Surrounding
1. CO2 can be easily liquified and even solidified because
(a) It has weak forces of attraction
(b) It has comparatively more force of attraction than other gases
(c) It has more intermolecular space
(d) It is present in atmosphere.
(a)
(b)
(c)
(d)
2. Which of the following has heighest kinetic energy?
(a) Particles of ice at 0 °C
(b) Particles of water at 0 °C
(c) Particles of water at 100 °C
(d) Particles of steam at 100 °C
a
b
c
d
3. The colour of vapours formed on sublimation of iodine solid is
(a) Purple (violet)
(b) Colourless
(c) Yellow
(d) Orange
a
b
c
d
4. Under which of the following conditions we can boil water at room temperature?
(a) At low pressure
(b) At high pressure
(c) At very high pressure
(d) At atmospheric pressure
a
b
c
d
5. Which of the following does not affect rate of evaporation?
(a) Wind speed
(b) Surface area
(c) Temperature
(d) Insoluble heavy impurities
a
b
c
d
6. Every matter has its own……………… and…………..
a) Mass, volume
b) Weight, mass
c) Brittleness, tough
d) Shape, shadow
a
b
c
d
7. Matter is classified on the basis of………….
a) Physical and chemical properties
b) Physical and biological properties
c) chemical properties
d) Biological and characteristical properties.
a
b
c
d
8. With increasing kinetic energy ……………………..
a) Pressure increases
b) Temperature increases
c) Temperature decreases
d) Pressure decreases
a
b
c
d
9. Water at 0 degree Celsius showing temperature at ………………..K
a) 274
b) 273
c) 277
d) 275
a
b
c
d
10. A change of state directly from solid to gas without changing into liquid state is called…
a) Sublimation
b) Solidification
c) Gasification
d) Crystallization
a
b
c
d
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