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Which of the following metal Fe, Zn, Pb,...

Which of the following metal Fe, Zn, Pb, Ag and Pt do not give a metal nitrate on treatment with concentrated `HNO_3`?

A

Fe and Zn

B

Fe and Pt

C

Pb, Ag and Pt

D

Fe, Ag and Pt

Text Solution

Verified by Experts

The correct Answer is:
B
When iron is treated with conc. `HNO_(2)`, it becomes pasive due to the formation of a protective layer of `FeO.Fe_(2)O_(3)` on its surface. Pt, on the other hand, being a noble metal does not react with conc. `HNO_(3)`.
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PRADEEP-P-BLOCK ELEMENTS -MCQ
  1. The reaction of zinc with dilute and concentrated nitric acid, respect...

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  2. When copper is heated with conc.HNO(3) it produces

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  3. Which of the following metal Fe, Zn, Pb, Ag and Pt do not give a metal...

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  4. The brown ring test for nitrates depends on

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  5. The oxidation number of Fe in brown ring [Fe(H(2)O(3))(5)NO]^(2+) is

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  6. [Fe(H(2)O)(5)NO]^(2+) is a complex formed during the brown ring test f...

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  7. Out of the following acids, the one which has the capability to form c...

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  8. The percentage of p-character in the orbitals forming p-p bonds in P4 ...

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  9. Which one of the following forms vortex ring

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  10. The reaction of white phosphorus with aqueous NaOH gives phosphine alo...

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  11. The reaction of P(4) with X leads selectively to P(4)O(6) The X is :

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  12. P(4)O(10) is the anhydride of

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  13. How many bridging atoms are present in P(4)O(10) ?

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  14. Of the following compounds, the most acidic is

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  15. The oxidation state of phosphorus in cyclometaphosphoric acid is :

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  16. The correct formula of salt formed by the neutraliation of hypophosph...

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  17. Oxyacid of phosphorus that can reduce AgNO3 to silver is

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  18. The pair in which phosphours atoms have a formed oxidation state of +3...

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  19. Which is the correct statement for the given acids ?

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  20. Which of the following is a cyclic oxo acid ?

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