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Question-1
On heating limestone, the gas produced is:
(A)
Oxygen
(B)
Hydrogen
(C)
Nitrogen
(D)
Carbon dioxide
Question-2
The black crystals obtained on heating silver chloride.
(A)
Silver hydroxide
(B)
Silver oxide
(C)
Silver
(D)
Carbon
Question-3
When magnesium is heated in air, the white powder formed is:
(A)
Oxide
(B)
Hydroxide
(C)
Sulphide
(D)
Oxalate
Question-4
Water can be decomposed into hydrogen and oxygen by:
(A)
Heat
(B)
Electricity
(C)
Light
(D)
Oxides
Question-5
The gas produced when iron is placed in hydrochloric acid is:
(A)
Nitrogen
(B)
Hydrogen
(C)
Ammonia
(D)
Oxygen
Question-6
Atmosphere was produced by a process known as:
(A)
Big - bang
(B)
Comparison
(C)
Out - grassing
(D)
Out burst
Question-7
The element used as a coolant.
(A)
Hydrogen
(B)
Nitrogen
(C)
Oxygen
(D)
Sulphur
Question-8
2H
2
+ O
2
→ 2H
2
O. It is a:
(A)
Decomposition reaction
(B)
Synthesis reaction
(C)
Neutralization reaction
(D)
Displacement reaction
Question-9
The reaction that occur between acid and bases are:
(A)
Synthesis reaction
(B)
Decomposition reaction
(C)
Thermal decomposition
(D)
Neutralisation
Question-10
The reaction in which the reactant breaks down into two or more products.
(A)
Synthesis reaction
(B)
Displacement reaction
(C)
Decomposition reaction
(D)
Neutralisation reaction
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Cambridge Secondary Grade 8
IGCSE
Practice in Related Chapters
Acid and Bases
The World of Matter
Simple Chemical Reactions
The Rock Cycle
Introducing Chemistry
Metals and Metal Compounds
Elements and Atoms
Separation of Mixtures
Compounds and Mixtures
Rocks and Weathering
Patterns of Reactivity
Chemistry and the Environment
Using Chemistry
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