Question

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Which of the following is an essential raw material in the cement industry?

• A. Mica
• B. Limestone
• C. Aluminium
• D. Coal

Answer 1

The correct option is B Limestone

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Limestone is an essential raw material in the cement industry. Cements of different types are made mainly by calcining a mixture of about 75% limestone and 25% clay.