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. The main constituents of pearl are
(a) Calcium carbonate and magnesium carbonate
(b) Aragonite and conchiolin
(c) Ammonium sulphate and sodium chloride
(d) Calcium oxide and ammonium chloride
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Answer Posted / pramod
calcium carbonate and magnesium carbonate
| Is This Answer Correct ? | 18 Yes | 9 No |
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