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Chalcopyrites is an ore of...

Chalcopyrites is an ore of

A

`Ag`

B

`Cu`

C

`Au`

D

`Mg`

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Chalcopyrite is an ore of -

Copper is the most noble of the first transition metals and occurs in small deposits in several countries. Ores of copper include chalcanthite (CuSO_(4).5H_(2)O) , atacamite (Cu_(2)Cl(OH)_(3)) , cuprite (Cu_(2)O) , copper glance (Cu_(2)S) and malachite (Cu_(2)(OH)_(2)CO_(3)) . Howerver 80% of the world copper production comes from the ore chalcopyrites (CuFeS_(2)) the extraction of copper from chalcopyrites involves partial roasting of iron and self reduction. Q. Partial roasting of chalcopyrites with silica added to it, produces,

AAKASH INSTITUTE-TEST 5-EXAMPLE
  1. Which of the following is not an oxide ore?

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  2. Van Arkel method is used for the refining of -

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  3. Chalcopyrites is an ore of

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  4. A certain gas takes half of the time to effuse out as taken by Ne gas ...

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  5. Amount of oxygen gas present in a 2 L vessel at 5 atm pressure and 27°...

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  6. Select the correct statement for isothermal expansion of an ideal gas

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  7. Standard enthalpy of formation is non zero for

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  8. Reaction for which Kp and Kc are equal

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  9. pH of a neutral solution at 360 K is Kw at 360 K is 3.6×10^(-13)

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  10. pH of aqueous solution of CH3COONa is given by

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  11. If concentration of F^- in saturated solution of CaF2 is x then solubi...

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  12. If three salts AB(s), AC(s) and AD(s) have equal solubility product th...

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  13. For one mole of a diatomic gas, the ratio of heat transfer at constant...

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  14. The equimolar salt solutions having lowest pH is

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  15. The pH of a solution at 25°C that contains 10^(-10) M hydroxide ions (...

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  16. Equal weight of oxygen and He are mixed in a closed container . The fr...

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  17. The ratio of units of vander Waals constants a and b is

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  18. The heat of combustion of P4(white) to P4O10(s) is -5.4 kJ mol^(-1). T...

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  19. The work done and internal energy change during the adiabatic expansi...

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  20. The solubility of AgCl(s) having solubility product 1.6×10^(-10), in 0...

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