Plaster of Paris is produced by heating

What is the chemical formula of Plaster of Paris?

Which of the following chemical compounds is commonly known as 'Plaster of Paris'?

Pearl is a hard object produced within the soft tissues of a mollusk. Which one of the following is the main constituent of pearl?

Which compound is used for increase of octane rating?

Which one of the following types of medicines is used for treating indigestion?