By Elimu Assistant Team
Chemistry — KCSE 1995Paper 1
📚 Topic: Metals
Question 10📚 Topic: Metals
KCSE 1995 • Chemistry Paper 1 • Question 10
Reactivity Series of Metals
Topic: Metals / Acids, Bases and Indicators
10. In an experiment, rods of metals P, Q and R were cleaned with sand paper and placed in a beaker containing water. Another set of rods was also cleaned and placed in a beaker containing dilute acid. After placing the rods in the two liquids, bubbles of gas were seen around some of the rods as shown in the diagrams below.
a) Why is it necessary to clean the rods with sand paper before dipping them into the liquids? (1mk)
b) Arrange the three metals in order of their reactivity starting with the most reactive. (1mk)
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