Question

4.
Oxide of which element is the major ingredient of cement.
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Answer 1

Answer:

silica.

Explanation:

Silica imparts strength to cement.

Silica usually presents to the extent of about 30 percent cement.

Hope this will useful for you.

Answer 2

The oxide of Calcium metal is the major ingredient of cement.

- Cement is also referred to as Portland cement.

- Its average composition is given as follows:

CaO = 50 - 60 %

SiO2 = 20 - 25 %

Al2O3 = 5 - 10 %

MgO = 2 - 3 %

Fe2O3 = 1 - 2 %

SO3 = 1 - 2 %

- Here, the oxide of metal Calcium, i.e., CaO (lime) is present in the largest quantity.

- So, lime is the major ingredient of cement.