The number of compounds present in Portland cement from the following is
\[
\mathrm{MgO,\ CaO,\ MgCO_3,\ MgCl_2,\ Al_2O_3,\ SO_3,\ SiO_2,\ CaSO_4,\ Fe_2O_3,\ CaCl_2}
\]
Show Hint
Major constituents of Portland cement are
\[
\boxed{
\mathrm{CaO,\ SiO_2,\ Al_2O_3,\ Fe_2O_3,\ MgO,\ SO_3}.
}
\]
Gypsum \((\mathrm{CaSO_4\cdot2H_2O})\) is added separately to regulate the setting time.