Question

Calcium phosphate is present in tooth enamel. What is its nature?
(A) Basic
(B) Acidic
(C) Neutral
(D) Amphoteric

Answer 1

In the above question, calcium phosphate is present in tooth enamel. We are asked about its nature. For this we have to look to dissociate the calcium phosphate into their reactant form to see which one is stronger, acid or base. We know that acidic substances are the main reason for tooth decay.

Complete answer:
Calcium phosphate is a family of substances and minerals which consist of calcium ions ( ${\text{C}}{{\text{a}}^{{\text{2 + }}}}$ ) with inorganic phosphate anions. In some calcium phosphates, oxides and hydroxides are also present. They are white solids of nutritious value. Calcium phosphates are found in many living organisms.
Calcium phosphate is basic salt since it is a source of weak phosphoric acid and a slightly stronger base of calcium hydroxide. Calcium phosphate is a mineral comprising calcium ion and phosphate ion which is inorganic in nature. It is present in the crown area of the tooth and also in bones.
Although calcium phosphate is a very hard substance, it can be dissolved in acids.
Hence, we can state that the nature of calcium phosphate is basic and hence, the correct option is option (A).

Additional information:
More than half of all bone is made from phosphate, and small amounts are also used in the body to maintain tissues and fluids. But the study according to osteoporosis experts, found that taking large amounts of calcium from supplements can interfere with phosphorus absorption.

Note:
Calcium is a mineral that is found naturally in foods. Calcium is necessary for many normal functions of the body, especially bone formation and maintenance.
Calcium phosphate is used to prevent and to treat calcium deficiencies.