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 Form 1 Chemistry Sample Exam Revision Questions With Answers

In an experiment a gas jar containing some damp iron fillings was inverted in a trough containing some water and the set up was left for 3 days.
a).Why was iron fillings moistened
b).State and explain observation made after 3 days

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Answer Text:
a).Because moisture is one of the requirements for rusting to take place
b).The grey iron filling turned to brown due to the formation hydrated iron iii oxide.