A lady bought a new iron container and kept blue vitriol
solution into it. On the next day, she found that the container becomes porous
and the blue colour of the solution fades. She go to the shopkeeper and
complained. But the shopkeeper argued that the container is of good quality and
he is not giving her money
back. An aware person Mohan came there and asked the matter
and told that the container is of good quality and you have kept the wrong
substance in it, so fault is all yours.
On the basis of above passage answer the following
(a) Why the container becomes porous when blue vitriol
solution is kept into it?
(b) What qualities are exhibited by Mohan?
The container becomes porous when blue vitriol solution is kept into it because
iron being more reactive displaces copper from copper sulphate (blue vitriol)
solution and itself form green coloured ferrous sulphate.
(b) Qualities exhibited by Mohan are scientific
knowledge, awareness, helpfulness, etc. (1)