Answer:
(a)
No, these are pure. (1)
(b) Anklets turned black due to the reaction of silver with atmospheric which results in the formation of
black coloured silver sulphide. (1)
(c) dissolves in acids
present in tamarind or lemon juice, so the anklets got their lustre back.
(1)
(d) The values exhibited by Rakhi are
(i) Awareness (ii) Helpful (iii) Knowledgeable.
(2)
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