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Question-1
The gas used in cookers and fires:
(A)
Ammonia
(B)
Methane
(C)
Butane
(D)
Hydrogen
Question-2
Sublimation is possible in:
(A)
Hydrogen
(B)
Ammonia
(C)
Iodine
(D)
Mercury
Question-3
The scientist who explained about the structure of matter.
(A)
Robert Boyle
(B)
Hero
(C)
Democritus
(D)
Maxwell
Question-4
The standard pressure is about:
(A)
12 N/cm
2
(B)
15 N/cm
2
(C)
1 N/cm
2
(D)
10 N/cm
2
Question-5
High energy liquid particles near the surface move so fast that they can break through the surface and escape into the air and form a gas. The process is called:
(A)
Freezing
(B)
Boiling
(C)
Melting
(D)
Evaporation
Question-6
Uranus is made from:
(A)
Hydrogen
(B)
Ammonia
(C)
Nitrogen
(D)
Urea
Question-7
The process in which solid turns directly into gases is called:
(A)
Evaporation
(B)
Condensation
(C)
Sublimation
(D)
Freezing
Question-8
The thickness of atmosphere is:
(A)
1000 km
(B)
100 km
(C)
10,000 km
(D)
10 km
Question-9
The planet which is made from a very large amount of hydrogen.
(A)
Mars
(B)
Saturn
(C)
Jupiter
(D)
Pluto
Question-10
The process by which the leaves of plant return water to the atmosphere is:
(A)
Evaporation
(B)
Freezing
(C)
Transpiration
(D)
Conformation
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Cambridge Secondary Grade 8
IGCSE
Practice in Related Chapters
Acid and Bases
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Elements and Atoms
Separation of Mixtures
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Rocks and Weathering
Patterns of Reactivity
Chemistry and the Environment
Using Chemistry
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