(B) mineral is a naturally occurring substance containing metal in combined form. An ore is a mineral from which a metal can be extracted conveniently

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metal can be extracted from it profitably.

(B) mineral is a naturally occurring substance containing metal in combined form. An ore is a mineral from which a metal can be extracted conveniently and profitably. Therefore,the correct condition for a mineral to be called an ore is that the metal can be extracted from it profitably.

Class 12 Chemistry General Principles and Processes of Isolation of Elements Occurrence

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$A$ mineral is called an ore $(ore)$ only when .....

A
metal can be extracted from it.
B
metal can be extracted from it profitably.
C
metal cannot be extracted from it.
D
metal is present in it in very small quantities.

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Class 12

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Chapter

General Principles and Processes of Isolation of Elements

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Occurrence

What is the formula of pyrolusite ore?

EasyMHT CET 2020

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Match List-$I$ and List-$II$ :

List-$I$ List-$II$

$(a).$ Haematite $(i).$ $Al_{2}O_{3} \cdot xH_{2}O$

$(b).$ Bauxite $(ii).$ $Fe_{2}O_{3}$

$(c).$ Magnetite $(iii).$ $CuCO_{3} \cdot Cu(OH)_{2}$

$(d).$ Malachite $(iv).$ $Fe_{3}O_{4}$

Choose the correct answer from the options given below :

List-$I$	List-$II$
$(a).$ Haematite	$(i).$ $Al_{2}O_{3} \cdot xH_{2}O$
$(b).$ Bauxite	$(ii).$ $Fe_{2}O_{3}$
$(c).$ Magnetite	$(iii).$ $CuCO_{3} \cdot Cu(OH)_{2}$
$(d).$ Malachite	$(iv).$ $Fe_{3}O_{4}$