Granite is mainly composed of

Gneiss is chemically classified as

Sprit varnish consists of

The time required for seasoning of timber in kilm seasoning is

The colour of brick depends upon the amount of iron oxide present in the clay.

Which of the following statement is wrong?

The main constituent of a Portland cement is

The lime which contains more than 30% of clayey impurities in the form of silica, alumina and iron oxide, is known as

Rich or fat lime