Question

.A crystal of iodine is heated in a close flask.

a. State your observation.

b. Write the phenomenon that has taken place in the above experiment.

Answer 1

Answer:

(i) When Iodine crystals are heated, the van der Waals forces are easily overcome and the molecule breaks into the gas phase. They sublime and form a purple colored dense vapor.

(ii) When Iron nail (Ferrum) is dipped in Copper sulphate (CuSO

4

) there takes reaction between them and copper sulphate changes its color from blue to light green. This shows Iron is more reactive than Copper, it can replace Copper from CuSO

4

Answer 2

Answer:

(i) When Iodine crystals are heated, the van der Waals forces are easily overcome and the molecule breaks into the gas phase. They sublime and form a purple colored dense vapor.

ii) When Iron nail (Ferrum) is dipped in Copper sulphate (CuSO 4 ) there takes reaction between them and copper sulphate changes its color from blue to light green. This shows Iron is more reactive than Copper, it can replace Copper from CuSO4

.