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DINESH PUBLICATION-D-AND -F BLOCK ELEMENTS-Question From Board Examination
- Write the electronic configuration of the element with atomic number 1...
00:47
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- Which out of the two ,La(OH)(3) and Lu(OH)(3), is more basic and why?
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- Why are Zn, Cd and Hg quite soft and have low melting points ?
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- Lanthanoid contraction is caused due to:
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- What may the possible oxidation state of transition metals with the fo...
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- Discuss the relative stability in aqueous solution of +2 oxidation sta...
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- How many unpaired electrons are present in Mn^(2+) ion ? How do they i...
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- Complete the following chemical equations for reactions in aqueous sol...
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- There is a greater range of variable oxidation states among the actino...
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- Why is ghere a general increase in density of elements from titanaium ...
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- Three occurs much more frequently metal-metal bonding in the compound...
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- Why is Cu^(+) ion not stable in aqueous solution ? or Why is Cu^(+...
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- Complete the following : (i) Cr(2)O(7)^(2-)(aq)+H(2)S(g)+H^(+)(aq) t...
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- Which is a stronger reducing agent Cr^(2+) or Fe^(2+) and why?
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- Among the divalent cations in the first transition series, manganese e...
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- La^(3+)(Z=57) and Lu^(3+)(Z=71) do not show any colour in solution. As...
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- Transition element act as good catalysts because
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- The atomic radii of the metals of the third (5d) series of transitions...
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- Explain why zinc is not rgardede as a transition element.
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- Explain why is Ce^(4+) ion a strong oxidising agent ?
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