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Question-1
The element used as a coolant.
(A)
Hydrogen
(B)
Nitrogen
(C)
Oxygen
(D)
Sulphur
Question-2
When magnesium is heated in air, the white powder formed is:
(A)
Oxide
(B)
Hydroxide
(C)
Sulphide
(D)
Oxalate
Question-3
2H
2
+ O
2
→ 2H
2
O. It is a:
(A)
Decomposition reaction
(B)
Synthesis reaction
(C)
Neutralization reaction
(D)
Displacement reaction
Question-4
In which layer of atmosphere, the amount of hydrogen falls to zero?
(A)
Exosphere
(B)
Mesosphere
(C)
Stratosphere
(D)
Troposphere
Question-5
The noble gas used to make bright light in a photographers flash gun.
(A)
Neon
(B)
Xenon
(C)
Krypton
(D)
Helium
Question-6
The composition of ozone in stratosphere.
(A)
25%
(B)
18%
(C)
15%
(D)
1%
Question-7
High temperature of 3200
o
C can be achieved by heating acetylene in:
(A)
Hydrogen
(B)
Nitrogen
(C)
Helium
(D)
Oxygen
Question-8
The white precipitate formed when silver nitrate solution in poured into sodium chloride solution.
(A)
Silver chloride
(B)
Sodium nitrate
(C)
Silver hydroxide
(D)
Sodium sulphate
Question-9
The scientist who invented argon.
(A)
Linde
(B)
William Ramsay
(C)
Einstein
(D)
Hund
Question-10
The gas evolved on heating potassium permanganate.
(A)
Oxygen
(B)
Hydrogen
(C)
Carbon dioxide
(D)
Nitrogen
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Cambridge Secondary Grade 8
IGCSE
Practice in Related Chapters
Acid and Bases
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Compounds and Mixtures
Rocks and Weathering
Patterns of Reactivity
Chemistry and the Environment
Using Chemistry
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