Question Detail

ZOO 101 ZOO 101 Past Questions Objective Question
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Question

Which one of the following is the main constituent of Pearl?
Options
A Calcium carbonate
Correct Answer
B Magnesium carbonate
C Calcium oxide
D Magnesium sulphate
Correct Answer

Option A is the correct answer.

Detailed Explanation

Pearls are primarily composed of calcium carbonate (CaCO3) in the form of aragonite (or a mixture of aragonite and calcite), deposited in concentric layers by mollusks. They also contain a protein called conchiolin, which acts as an organic matrix. The calcium carbonate gives pearls their hardness and luster.

Hint

Consider the mineral that forms the hard, iridescent layers of a pearl.

Question Info

Course: ZOO 101
Topic: ZOO 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 834 of 2214
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