You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard XII

Chemistry

Composition and Manufacture and Uses of Cement

The main cons...

Question

The main constituents of cement are:

calcium oxide, silicon dioxide, aluminium oxide

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

calcium oxide, Iron oxide, sulphur dioxide

No worries! We‘ve got your back. Try BYJU‘S free classes today!

magnesium oxide, silicon dioxide, aluminium oxide

No worries! We‘ve got your back. Try BYJU‘S free classes today!

none of these

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A calcium oxide, silicon dioxide, aluminium oxide
Portland cement consists essentially of compounds of lime (calcium oxide, CaO) mixed with silica (silicon dioxide, $S i O_{2}$ ) and alumina (aluminium oxide, $A l_{2} O_{3}$ ). The lime is obtained from a calcareous (lime-containing) raw material, and the other oxides are derived from an argillaceous (clayey) material.

Suggest Corrections

Similar questions

Pick the odd member from the list giving reasons :

(a) Ammonia, sulphur dioxide, hydrogen chloride, carbon dioxide.

(b) Copper oxide, aluminium oxide, sodium oxide, magnesium oxide.

Write the balanced chemical equations of the following reactions.

(a) Sodium hydroxide + sulphuric acid $\to$ sodium sulphate + water

(b) Potassium bicarbonate + sulphuric acid $\to$ potassium sulphate + carbon dioxide + water

(d) Chlorine + sulphur dioxide + water $\to$ sulphuric acid + hydrogen chloride

(e) Silver nitrate $\to$ silver + nitrogen dioxide + oxygen

(f) Copper + nitric acid $\to$ copper nitrate + nitric oxide + water

(g) Ammonia + oxygen $\to$ nitric oxide + water

(h) Barium chloride + sulphuric acid $\to$ barium sulphate + hydrochloric acid

(i) Zinc sulphide + oxygen $\to$ zinc oxide + sulphur dioxide

(j) Aluminium carbide + water $\to$ aluminium hydroxide + methane

(k) Iron pyrites ( $F e S_{2}$ ) + oxygen $\to$ ferric oxide + sulphur dioxide

(l) Potassium permanganate + hydrochloric acid $\to$ potassium chloride + manganese chloride + chlorine + water

(m) Aluminium sulphate + sodium hydroxide $\to$ sodium sulphate + sodium meta aluminate + water.

(n) Aluminium + sodium hydroxide + water $\to$ sodium meta aluminate + hydrogen

(o) Potassium dichromate + sulphuric acid $\to$ potassium chloride + chromium chloride + water + chlorine.

(p) Sulphur + nitric acid $\to$ sulphuric acid + nitrogen dioxide + water.

(q) Sodium chloride + manganese dioxide + sulphuric acid $\to$ sodium hydrogen sulphate + manganese sulphate + water + chlorine.

Translate the following statements into chemical equations and then balance the equations :

(a) Hydrogen sulphide gas burns in air to give water and sulphur dioxide.

(b) Phosphorus burns in oxygen to give phosphorus pentoxide.

(d) Aluminium metal replaces iron from ferric oxide, $F e_{2} O_{3}$ , giving aluminium oxide and iron.

(e) Barium chloride reacts with zinc sulphate to give zine chloride and barium sulphate.

Convert and identify the type of reaction

1 when aqueous solution of calcium chloride is mixed with aqueous solution of Ammonium carbonate

2 ferric oxide is heated with aluminium metal to form Ion of Aluminium oxide

3 when hydrated f e s o4 ._.6H₂O is heated to form ferric oxide Sulphur dioxide and sulphur trioxide

Q. Aluminium oxide contains 52.9% aluminium and carbon dioxide contains 27.27% carbon. Assuming the validity of the law of reciprocal proportions, calculate the percentage of aluminium in aluminium carbide.

Join BYJU'S Learning Program