The most reactive metal is

• Iron

• Gold

• Zinc

• Potassium

(a) Observe the following figure,(a) and (b) and complete the reaction and tell in which beaker/beakers displacement reactions take place.





(ii) Arrange Zinc, Aluminium, Iron and Copper in the decreasing order of reactivity.

 The best electrical conductor is

• gold

• copper

• silver

• aluminium

Which of the following statement is correct?

• Zinc is more reactive than sodium

• Copper is more reactive than zinc

• Zinc is more reactive than iron

• Iron is more reactive than zinc

Metals react with acids to give

• Oxygen gas

• Hydrogen gas

• Sulphur dioxide gas

• Carbon dioxide gas