Question

a. In which test tube a reaction has
taken place?
b. How did you recognize that a
reaction has taken place?
c. What is the type of the reaction?​

Answer 1

Answer:

a. The test tube containing copper sulphate & iron nail will show a chemical reaction .

b. The Change in colour from blue to green & settled copper on iron nail will characterize the chemical reaction.

c. It is a displacement reaction, as a more reactive element is displacing a less reactive element from its compound.

hope it helps you.....

Answer 2

Answer:

a. Reaction has taken place in the test tube where iron nail is put i.e 1st test tube

b. We can see a copper coating on iron nail and the blue coloured copper sulphate turning colourless. From this, we can understand chemical reaction has taken place.

c. Displacement reaction has taken place. Iron is more reactive than copper. So, iron displaces copper from copper sulphate.