All ores are minerals , but all mineral...

All ores are minerals , but all minerals cannot be called as ores ,

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A naturally occurring substance obtained by mining which contains the metal in free state or in the form of compounds is called a mineral. In most of the minerals, the metal of interest is present only in small amounts and some of them contains a reasonable percentage of metal. Such minerals that contains a high percentage of metal, from which it can be extracted conveniently and economically are called ores. Hence all ores are minerals but all minerals are not ores.

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Consider the following statements. (i) All ores are minerals but all minerals are not ores. (ii) Bauxite is an ore of aluminium while clay is not. (iii) Extraction of aluminium form clay is profitable one. Which of the above statement(s) is/are not correct?

(i) only

(ii) only

(iii) only

(i), (ii) and (iii)

Consider the following statements. (i)All ores ar minerals but all minerals are not ores. (ii) bauxite is an ore of aluminium while clay is not. (iii) Extraction of aluminium from clay is profitable one.

(i)Only

(ii)Only

(iii)Only

(i),(ii) and (iii)

Identify the true statements from the following: I. All ores are minerals II. All minerals are not ores. III. Aluminium can be extracted from bauxite. IV. Aluminium can be extracted from china clay.

Only I

Only II

III & IV

I, II & III