Question

Harshan has set up the following activity shown in the picture in the chemistry laboratory.
Three test tubes A, B and C are taken and an iron nail is placed in each of the test tube.
Test tube A has iron nail half immersed in normal water, Test tube B has iron nail
dipped in boiled water and Test tube C has iron nail with a white coloured chemical
substance. Answer the following questions in context to the above activity:

(a) What is Harshan trying to conclude from the above activity?
(b) The white substance kept in test tube C, is a good absorbent of water. Name the
chemical substance.
(c) The iron nail present in which of the above test tubes will get rusted, if it is left
for
few days and why?
(d) State why is boiling water taken in test tube B?

Answer 1

Answer:

d state why is boiling water taken in tea t tube b