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Results for "rusting"
3 total matches❓ Question Bank Matches (3)
P.5
Section A (1 Mark)
Types of Changes in the Environment
Topical Evaluation
State the role of anhydrous calcium chloride in the laboratory investigation of rusting.
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Correct Answer / Guide:
To absorb all moisture/water vapour from the air inside the test tube (keeps the air dry).
To absorb all moisture/water vapour from the air inside the test tube (keeps the air dry).
P.5
Section A (1 Mark)
Types of Changes in the Environment
National PLE Question
Give any one danger of rusting to a school farmer's tools.
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Correct Answer / Guide:
It makes sharp cutting tools blunt OR weakens hoes/pangas OR causes tools to break easily.
It makes sharp cutting tools blunt OR weakens hoes/pangas OR causes tools to break easily.
P.5
Section A (1 Mark)
Types of Changes in the Environment
Topical Evaluation
How does painting an iron gate prevent it from rusting?
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Correct Answer / Guide:
Painting covers the iron surface, preventing oxygen and moisture from coming into direct contact with the iron.
Painting covers the iron surface, preventing oxygen and moisture from coming into direct contact with the iron.