. Wool can dissolve in
(a) Acid (b) Bases
(c) Both ‘a’ and ‘b’ (d) None of these
(b) Wool has the following chemical properties
(1) Action of heat: It starts changing colour at 100°C, but does not catch fire easily. It also becomes yellowish when left in a hot, humid atmosphere for a long time. So, the wool on the body of a sheep living in a hot, humid region may be yellowish.
(2) Action of acids and bases: It dissolves in acids and alkalis.
(3) Action of bleaching agents: The fibre can be bleached without loss of strength.