Consider the following statements with regard to major minerals found in earth crust?
1. Half of the earth’s crust is composed of quartz.
2. Feldspar is one of the most important components of sand and granite.
Which of the statements given above is/are correct?
1 only
2 only
Both 1 and 2
Neither 1 nor 2
Feldspar - Silicon and oxygen are common elements in all types of feldspar and sodium, potassium, calcium, aluminium etc. are found in specific feldspar variety. Half of the earth’s crust is composed of feldspar. It has light cream to salmon pink colour. It is used in ceramics and glass making.
Quartz - It is one of the most important components of sand and granite. It consists of silica. It is a hard mineral virtually insoluble in water. It is white or colourless and used in radio and radar. It is one of the most important components of granite.
The term 'West Texas Intermediate', sometimes found in news, refers to a grade of
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