Reactivity of Metals in Solutions

The video tutorial explores the relative reactivity of metals through experiments involving zinc, copper, aluminium, and iron with various sulphate solutions. Zinc displaces copper and iron, indicating higher reactivity. Copper shows no reactivity, being the least reactive. Aluminium displaces copper, zinc, and iron, proving to be the most reactive. Iron displaces copper but not aluminium or zinc. The order of reactivity is established as aluminium being the most reactive, followed by zinc, iron, and copper.

What happens to the copper sulphate solution when zinc is added?

• The solution turns green.

• The solution turns red.

• The blue color disappears and copper settles at the bottom.

• The solution remains blue.

Why does zinc not react with aluminium sulphate solution?

• Zinc is less reactive than aluminium.

• Zinc is more reactive than aluminium.

• Zinc does not react with any sulphate solution.

• Zinc and aluminium have the same reactivity.

What is observed when copper is added to zinc sulphate solution?

• Copper displaces zinc.

• The solution remains unchanged.

• The solution turns blue.

• The solution turns red.

Which metal is less reactive than copper?

• Iron

• Aluminium

• Zinc

• None of the above

What happens when aluminium is added to copper sulphate solution?

• The solution remains blue.

• The blue color disappears and copper settles at the bottom.

• The solution turns red.

• The solution turns green.

Which metal does aluminium displace from its sulphate solution?

• All of the above

• Copper

• Zinc

• Iron

What is the result of adding iron to copper sulphate solution?

• The solution turns red.

• The solution remains unchanged.

• The solution turns light green and copper settles at the bottom.

• The solution turns blue.

Why does iron not react with aluminium sulphate solution?

• Iron does not react with any sulphate solution.

• Iron is more reactive than aluminium.

• Iron and aluminium have the same reactivity.

• Iron is less reactive than aluminium.

Which metal is the most reactive according to the experiments?

• Iron

• Zinc

• Copper

• Aluminium

Which metal is the least reactive according to the experiments?

• Aluminium

• Iron

• Zinc

• Copper