Which one of the following has a composition of calcium phosphate?

Correct option is D

Explanation The correct answer is (d) Apatite. Apatite is a group of phosphate minerals with the general formula Ca₅(PO₄)₃(F, Cl, OH). It is the primary source of phosphorus and contains calcium phosphate.
Breakdown of Other Options:
1. (a) Dolomite:
· Composed of calcium magnesium carbonate with the formula CaMg(CO₃)₂.
2. (b) Calcite:
· Composed of calcium carbonate with the formula CaCO₃.
3. (c) Aragonite:
· Another form of calcium carbonate with the same formula CaCO₃ but a different crystal structure compared to calcite.
Information Booster 1. Apatite:
· Contains calcium phosphate and is a key component of bones and teeth.
· Important mineral for the production of fertilizers due to its phosphorus content.
2. Uses of Apatite:
· In agriculture for phosphate fertilizers.
· In medicine and dentistry as a source of synthetic materials for bone and tooth repair.
3. Other Minerals:
· Calcite and Aragonite: Common forms of calcium carbonate found in sedimentary rocks.
· Dolomite: Forms in marine environments and is used in construction and as a magnesium source.
Additional Knowledge · Phosphorus Cycle:
· Phosphorus is essential for DNA, RNA, and ATP in living organisms.
· Biomineralization:
· Apatite is a key mineral in the formation of vertebrate bones and teeth.