17. Read the following paragraph and answer the questions
While using iodine in the laboratory, some drops of iodine fell on Paheli's
socks and some fell on her teacher's saree. The drops of iodine on the
saree turned blue black while their colour did not change on the socks.
i) The change in colour is due to the presence of
in the saree.
a) sugar b) starch c) salt d) mineral
ii) What is the colour of the iodine solution before the incident?
a) red b) blue c) reddish brown d) black
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