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प्रश्न
In order to protect iron from corrosion, which one will you prefer as a sacrificial electrode, Ni or Zn? Why? (Given standard electrode potentials of Ni, Fe and Zn are -0.25 V, -0.44 V and -0.76 V respectively.)
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उत्तर
Zn, it has a more negative electrode potential so will corrode itself in place of iron.
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संबंधित प्रश्न
What are interstitial compounds?
Give reasons:
Transition metals show variable oxidation states.
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| Example | Magnetic Moment (BM) |
| K2[MnCl4] | 5.9 |
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Transition metals with lowest melting point is ______.
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When an oxide of manganese (A) is fused with KOH in the presence of an oxidising agent and dissolved in water, it gives a dark green solution of compound (B). Compound (B) disproportionates in neutral or acidic solution to give purple compound (C). An alkaline solution of compound (C) oxidises potassium iodide solution to a compound (D) and compound (A) is also formed. Identify compounds A to D and also explain the reactions involved.
How is the variability in oxidation states of transition metals different from that of p-block elements?
Which of the following ions has the electronic configuration 3d6?
(Atomic number: Mn = 25, Co = 27, Ni = 28)
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