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Which of the following statement(s) is/a...

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

A

The Chief ore of zinc is cinnabar

B

Mac-Arther's process is used to extract silver

C

`Na_(2)S_(2)O_(3)` is used to remove the unexposed AgBr from the photographic films

D

Nessler's reagent is complex of zinc in +2 oxidation state

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The correct Answer is:
B, C
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VK JAISWAL-d-BLOCK ELEMENTS-ONE OR MORE ANSWER IS/ARE CORRECT
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  2. Which of the following statements are true for Mohr's salt?

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

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  4. Rosasting of copper pyrites is done:

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  5. Identify the correct statements:

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  6. Which statements about mercury are correct?

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  7. Which statements about corrosive sublimate (HgCl(2)) are correct?

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  8. Identify the statement which is correct for copper sulphate

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  9. To an acidified dichromate solution, a pinch of Na(2)O(2) is added and...

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  10. Pick out the correct statement(s):

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  11. The species that undergoes disproportionational is an alkaline medium ...

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  12. Which of the following statements regarding d block elements are true?

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  13. Which is/are insoluble in NH(3) solution?

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  14. Order of paramagnetic character among following element is/are"

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  15. Choose correct statements (s) regarding the following reactions. Cr(...

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  16. Mercuric chloride is converted into mercury by:

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  17. What changes occur when acidified CrO(4)^(2-) ion react with H(2)O(2) ...

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  18. Choose correct statements (s) regarding the following reactions. Cr(...

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  19. What changes occurs when acidfied CrO(4)^(2-) ion reacts with H(2)O(2)...

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  20. Mercury is a liquid at 0^(@)C because of:

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