Match the items under List 1 (oxides) with those under List 2 (percentage) in an oxide composition of ordinary Portland cement.
|
List 1 |
List 2 |
||
|
P) |
Iron Oxide (Fe2O3) |
1) |
1% - 2.9% |
|
Q) |
Sulphur trioxide (SO3) |
2) |
17% - 25% |
|
R) |
Alumina (Al2O3) |
3) |
0.5% - 6% |
|
S) |
Silica (SiO2) |
4) |
3.5% - 9% |
1
P - 4, Q - 3, R - 1, S - 2
2
P - 4, Q - 1, R - 2, S - 3
3
P - 3, Q - 1, R - 4, S - 2
4
P - 2, Q - 4, R - 1, S - 3