Question

Comprehension Passage Eight percent of Earth’s crust is aluminum, and there are hundreds of aluminum-bearing minerals and vast quantities of the rocks that contain them. The best aluminum ore is bauxite, defined as aggregates of aluminous minerals, more or less impure, in which aluminum is present as hydrated oxide. Bauxite is the richest of all those aluminous rocks that occur in large quantities and it yields alumina, the intermediate product required for the production of aluminum. Alumina also occurs naturally as the mineral corundum, but corundum is not found in large deposits of high purity, and therefore it is an impractical source for making aluminum. Most of the many abundant nonbauxite aluminous minerals are silicates, and, like all silicate minerals, they are refractory, resistant to analysis, and extremely difficult to process. The aluminum silicates are therefore generally unsuitable alternatives to bauxite because considerably more energy is required to extract an alumina from them.
1. The author implies that a mineral must either be or
readily supply which of the following in order to be
classified as an aluminum ore?
(A) An aggregate
(B) Bauxite
(C) Alumina
(D) Corundum
(E) An aluminum silicate

Answer 1

Answer:

d

please follow me and mark as brainliest answer

Answer 2

Answer:

The correct answer is (B) Bauxite.

Explanation:

Bauxite is the best aluminum ore which are aggregates of aluminous minerals, which might be pure or impure where aluminum is present as hydrated aluminum oxide. It is the richest ore of all the other ores occurring in nature. Bauxite is present in large quantities and it also requires less energy to extract alumina. Alumina is the intermediate product required for the production of aluminum. Aluminum silicates are another ore but they are generally unsuitable alternatives to bauxite because they require more consumption of energy. Therefore, bauxite is the most suitable ore of aluminum.