A) \[Fe\]
B) \[Al\]
C) \[Na\]
D) All of these
Correct Answer: A
Solution :
(i) Brown glass contains \[F{{e}_{2}}{{O}_{3}}\] and sodium and calcium silicate. (ii) Cement has about\[1%\,\,F{{e}_{2}}{{O}_{3}}\]. \[\therefore \]Cement and brown glass both have iron.
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