Question

Which of the following is the correct use of calcium oxide?

• A. Manufacturing cement
• B. Manufacture of $N{a}_{2}C{O}_3$ from caustic soda
  
• C. Manufacture of dye stuffs
  
• D. All of the above

Answer 1

The correct option is D All of the above

Uses of calcium oxide:
1) Manufacturing cement
2) Manufacture of $N{a}_{2}C{O}_3$ from caustic soda
3) Manufacture of dye stuffs
4) Purification of sugar
Hence, the correct answer is option (d).