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14. In extraction of iron, calcium oxide is used to remove..
a. Iron impurities
b. Dull nature of the iron
c. Silicon impurities
d. Silica impurities

13. All are not important compounds except…
a. CaCO3
b. CaF2
c. CaSO4
d. CaC2

12. A mixture of slaked lime and sand is called
a. Paste
b. Mortar
c. Sticked bricks
d. Sand does not take part in the formation.

11. Suspension of slaked lime in water is Called
a.Lime kiln
b. Lime water
c. Milk lime
d. Quick lime

10. Cement is obtained by heating a mixture of Limestone and Clay containing....
a. Si2O and CO
b. CaO and SiO2
c. SiO2 only
d. SiO2 and Aluminium Oxide

9. The Full Meaning Of P.O.P is..........