Question

Egg shell is made up of a chemical. In which of the two ores this chemical is present?

• A. Lime stone : $CaC{O}_3$, Dolomite : $CaC{O}_3.MgC{O}_3$
• B. Lime stone : $CaC{O}_3.MgC{O}_3$, Dolomite : $CaC{O}_3$
• C. Lime stone : $C{a}_{2}C{O}_3$, Dolomite : $C{a}_{2}C{O}_3.MgC{O}_3$
• D. None of these

Answer 1

Answer: (A)

Lime stone : $CaC{O}_3$, Dolomite : $CaC{O}_3.MgC{O}_3$

The main ingredient in eggshells is calcium carbonate. The shell itself is about 95% $CaC{O}_3$ (which is also the main ingredient in sea shells). The remaining 5% includes calcium phosphate and magnesium carbonate and soluble and insoluble proteins. Lime stone : $CaC{O}_3$, Dolomite : $CaC{O}_3.MgC{O}_3$