Select the incorrect option about the chemical compounds present in cement.
a. Cement contains Gypsum.
b. Cement contains clay.
c. Cement contains alum.
d. cement contains alumina.
1
Only a and c
2
Only b and d
3
Only a
4
Only c
Select the incorrect option about the chemical compounds present in cement.
a. Cement contains Gypsum.
b. Cement contains clay.
c. Cement contains alum.
d. cement contains alumina.