General Knowledge - General Science - Discussion

Pearl is a mixture of caco3, mgc03 NH4so4 nacl cao nh4cl conhilion aragonite.

Pearl is obtained from mollusca Pinctada vulgaris.

I am not understanding what is conchiolin. Please, can anyone tell me?

The main constituents are not having a magnitude that's towards occupied by calcium carbonate and magnesium carbonate.

What is said by @K.M.Jayakarkuvel Raj is right I think so.

Pearl is formed by the combination of aragonite 85%+alubiminaid protein (conchiolin)12%+water 3%.

So please correct the answer which is option C and not B.

Pearl are made of calcium carbonate and magnesium carbonate.

Pearls are not a single compound, but a mixture of calcium carbonate with a protein called conchiolin, which acts as a sort of "binder".

PEARL HARBOUR incident lead to HIROSHIMA and NAGASAKI mahakanda in JAPAN gave up in WW2.

Anyways coming back to chemistry from history we have.

Following chief constituents of pearl:

1. Calcium Carbonate.

2. Calcium Oxide.

3. Ammonium Sulphate.

4. Ammonium Chloride.

5. Magnesium Carbonate.

6. Sodium Chloride.

7. Aragonite.

8. Conchiolin.

As per question and the answer option combination the "main components" So answer should be CALCIUM CARBONATE & MAGNESIUM CARBONATE.

A pearl is a hard object produced within the soft tissue (specifically the mantle) of a living shelled mollusk. Just like the shell of a mollusk, a pearl is made up of calcium carbonate in minute crystalline form, which has been deposited in concentric layers.