From the given set of minerals, the number of ores of copper is/are ___
Chalcocite, pyrargyrite, cuprite, carnallite, covellite, sphalerite, azurite, malachite, cryolite

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Solution

Copper ores:
1. Chalcocite – $C u_{2} S$
2. Cuprite – $C u_{2} O$
3. Covellite - $C u S$
4. Azurite – $2 C u C O_{3} . C u (O H)_{2}$
5. Malachite - $C u C O_{3} . C u (O H)_{2}$

Other ores:
Pyrargyrite – $A g_{3} S b S_{3}$ (also known as ruby silver; dark-red silver ore)
Carnallite – $K C l . M g C l_{2} .6 H_{2} O$
Sphalerite – $Z n S$ (also contains iron; but principally an ore of zinc)

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S_{1}

S_{2}

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\begin{matrix} C o l u m n - I & C o l u m n - I I (P) & C o l e m a n i t e o r e & (1) & C a r b o n a t e a n d h y d r o x i d e (Q) & C h a l c o c i t e & (2) & H a l i d e o r e (R) & F l u o r s p a r & (3) & S u l p h i d e o r e (S) & A z u r i t e & (4) & B o r a t e o r e \end{matrix}

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