Saturday, November 13, 2021

Metals and Non-metals | Class 10 | Activity 3.12 with solution

Metals and Non-metals | Activities in Text Book with Solution

Activity 3.12 

Take a clean wire of copper and an iron nail.

Put the copper wire in a solution of iron sulphate and the iron nail in a solution of copper sulphate taken in test tubes (Fig. 3.4).

Fig. 3.4

Record your observations after 20 minutes.

✅ Answer: After 20 minutes, it is observed that blue CuSO4 solution turns green.

In which test tube did you find that a reaction has occurred?

✅ Answer: Test tube containing CuSO4 solution.

On what basis can you say that a reaction has actually taken place?

✅ Answer: The blue colour of CuSO4 starts fading.

Can you correlate your observations for the Activities 3.9, 3.10 and 3.11?

✅ Answer: Yes. In those activities, it is found that Iron is more reactive than copper. It displaces Cu from CuSO4 to form FeSO4.

Write a balanced chemical equation for the reaction that has taken place.

✅ Answer: Fe(s) + CuSO4(aq) → FeSO4(aq) + Cu(s)


Name the type of reaction.

✅ Answer: This is a displacement reaction. i.e., reactive metals displace less reactive metals from their compounds in solution or molten form.

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