Question

Thomas slag is

• A. ${\mathrm{CaSiO}}_3$
• B. ${\mathrm{Ca}}_4{\left({\mathrm{PO}}_4\right)}_2\mathrm{O}$
• C. ${\mathrm{CaCO}}_3$
• D. ${\mathrm{MnSiO}}_3$

Answer 1

The correct option is B

${\mathrm{Ca}}_4{\left({\mathrm{PO}}_4\right)}_2\mathrm{O}$

Explanation for correct option:

Option B. ${\mathrm{Ca}}_4{\left({\mathrm{PO}}_4\right)}_2\mathrm{O}$

Thomas slag:

• The tetra calcium phosphate is known as Thomas slag.
• The chemical formula of Thomas slag is $\text{C}{\text{a}}_{\text{4}}\text{(P}{\text{O}}_{\text{4}}{\text{)}}_{\text{2}}\text{O}$ .
• It is used as a phosphorus fertilizer because it is soluble in water and contains a high amount of phosphorus.
• The phosphorus fertilizer is beneficial for the growth of roots of the plants.

Explanation for incorrect options:

Option A. Wollastonite is mineral $\left({\mathrm{CaSiO}}_3\right)$ composed of calcium inosilicate mineral that may contain small amounts of iron, magnesium, and manganese substituting for calcium.

Option C. Calcium carbonate has a molecular formula ${\mathrm{CaCO}}_3$ that is found in the mineral rock known as calcite. It is also known as limestone.

Option D. $\text{MnSi}{\text{O}}_{\text{3}}$ is a low-temperature high-pressure, dimorph of rhodonite and is known as Pyroxmangite.

Hence, the correct option is B. Thomas slag is $\text{C}{\text{a}}_{\text{4}}\text{(P}{\text{O}}_{\text{4}}{\text{)}}_{\text{2}}\text{O}$.