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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. Which of the following are correctly matched?

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  2. Which of the following statements are correct ?

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  3. Which of the following statement is/are correct?

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  4. Find out the incorrect statement among the following.

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  5. Which of the following are the advantages of using oxygen in place of ...

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  6. In the extraction of chlorine from brine

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  7. Which of the following is/are correctly matched?

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  8. In which of the following pair(s) the minerals are converted in to met...

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

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

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

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

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  13. The major role of flourspar, CaF(2) which is added in small amount in ...

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

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

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

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  17. Bessemerisation is carried out for

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  18. Select the correct statement.

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

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

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