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(a) Account for the following: (i) Transition metals show variable oxidation states. (ii) Zn, Cd and Hg are soft metals. (iii) Eo value for the Mn3+/Mn2+ couple is highly positive (+ 1.57 V) as compared to Cr3+/Cr2+. (b) Write one similarity and one difference between the chemistry of lanthanoid and actinoid elements. |
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Answer» (a) Account for the following: (i) Transition metals show variable oxidation states. (ii) Zn, Cd and Hg are soft metals. (iii) Eo value for the Mn3+/Mn2+ couple is highly positive (+ 1.57 V) as compared to Cr3+/Cr2+. (b) Write one similarity and one difference between the chemistry of lanthanoid and actinoid elements. |
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