Answer:
(a) The values shown by Alka are
curiosity, eager and learner. (1)
(b) She explained that in frost
free refrigerator, ice does not deposit in the freezer of a refrigerator. These
refrigerators are equipped with defrosting technique i.e., the ice deposited on
the walls of the freezer during thecooling cycle sublimes when warm air is
circulated through the compartment during the defrost cycle. As aresult of
these repeated cooling and defrosting cycles, icedoes not deposit.
(1)
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