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Which of the following statements(s) is ...

Which of the following statements(s) is (are) true?

A

In process of the precipatation of silver from sodium dicyano argentate (I), the zinc acts as reducing agent as well as complexing agent.

B

In the process of roasting , the copper pyrites is converted inot a mixture of `Cu_(2)` & `FeS` which, in turn, are partially oxidised

C

Limonite , haemattien and magnesite are ores of iron.

D

Tin and lead both are extracted from their ores by self- ruduction.

Text Solution

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The correct Answer is:
A, B
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NARAYNA-METTALURGY-MULTIPLE ANSWER QUESTOINS
  1. The reaction (s) which does (do) not occur in the reduction zone in th...

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  2. Cassiterite ore (SnO(2)) is purified by

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  3. Which of the following statements(s) is (are) true?

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  4. Why lime stone is added in the extraction of lead from galena ?

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  5. The major role of fluorpar (CaF2 ) which added in small quantities in ...

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  6. Which of the following statement(s) is /are correct?

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  7. Which of the following statement(s) is/are correct about slag?

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  8. Which of the following common element(s) is/are present in the anode m...

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  9. Bessemerisation is carried out for

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  10. Select the correct statement.

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  11. The reaction (s) which does (do) not occur in the reduction zone in th...

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  12. Which of the following reduction reactions are actually employed in co...

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  13. Froth flotation

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  14. The metals which cannot be obtained by electrolysis of aqueous solutio...

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  15. Which of the following are methods of concentration of minerals

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  16. Roasting is carried out to :

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  17. The correct statement (s) is/are

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  18. Following reaction(s) is/are involved in thermite process :

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  19. Why lime stone is added in the extraction of lead from galena?

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  20. Amphoteric nature of aluminum is employed in which of the following pr...

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