The substance not likely to contain CaCO₃ isa)dolomiteb)calcined gypsumc)a marble statued)sea shellsCorrect answer is option 'B'. Can you explain this answer?

Question

The substance not likely to contain CaCO&#8323; isa)dolomiteb)calcined gypsumc)a marble statued)sea shellsCorrect answer is option 'B'. Can you explain this answer?

Answer

Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO4.2H2O

. It does not have CaCO3.

Marble is composed of recrystallized carbonate minerals, most commonly calcite (CaCO3) or dolomite (CaMa(CO3)2).

The correct option is b

Answer

Dolomite is a mineral containing carbonates of calcium and magnesium.Marble statue and sea shells also contains calcium carbonate but calcined gypsum contains calcium sulphate.

Answer

Explanation:

CaCO3 (calcium carbonate):
Calcium carbonate (CaCO3) is a chemical compound commonly found in nature. It is a white, powdery substance that is widely used in various industries. Calcium carbonate is abundant in the earth's crust and can be found in rocks, minerals, and shells of marine organisms.

Dolomite:
Dolomite is a mineral that contains calcium carbonate (CaCO3) and magnesium carbonate (MgCO3). It is commonly found in sedimentary rocks and is often used as a building material.

Calcined gypsum:
Calcined gypsum, also known as plaster of Paris, is a white, powdery substance that is derived from gypsum (CaSO4·2H2O). When gypsum is heated to a high temperature, it loses its water content and is converted into calcined gypsum. This substance is commonly used in construction and as a soil amendment.

Marble statue:
Marble is a metamorphic rock that is formed from limestone (which contains calcium carbonate, CaCO3) under high temperature and pressure conditions. Marble is commonly used in sculptures and statues due to its beautiful appearance and durability.

Sea shells:
Sea shells are the hard, protective outer coverings of marine animals. They are primarily composed of calcium carbonate (CaCO3) and serve as a protective barrier for the animal. Sea shells are commonly found on beaches and are often used in crafts and decorations.

Explanation of the correct answer:
The substance not likely to contain CaCO3 is calcined gypsum (option B). Although calcined gypsum is derived from gypsum, which contains calcium sulfate (CaSO4), it does not contain calcium carbonate (CaCO3). Calcined gypsum is chemically different from calcium carbonate and has different properties and uses.

Dolomite (option A), marble statue (option C), and sea shells (option D) all contain calcium carbonate (CaCO3) and are therefore likely to have CaCO3 present in their composition.

In summary, while dolomite, marble statues, and sea shells all contain calcium carbonate (CaCO3), calcined gypsum does not contain CaCO3 and is the substance not likely to contain it.

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