CBSE 12th Standard Chemistry Subject The d- and f- Block Elements HOT Questions Fill Up Questions With Solution 2021
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CBSE 12th Standard Chemistry Subject The d- and f- Block Elements HOT Questions Fill Up Questions With Solution 2021
12th Standard CBSE
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Reg.No. :
Chemistry
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Calculate the spin only magnetic moment of Iron present in the following compound.
[Fe(H2O)5NO]2+(a)5.92 BM
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Among the ionic species Sc3+, Ce4+ and Eu2+ Which one is a good oxidizing agent?
(a)Ce4+ is a good reducing agent because it can readily change to to the most stable oxidation state by gaining one electron. Others cannot do so.
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Why are Fe3+ and Cu2+ prominent in their aqueous solutions?
(a)Because of high hydration enthalpies.
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CrO3 is an acid anhydride. Explain.
(a)It dissolves in water to give chromic acid.
CrO3 + H2O ⟶ H2CrO4 -
Though both Cr2+ and Mn3+ have d4 configuration, yet Cr2+ is reducing and Mn3+ is oxidizing. Explain Why?
(a)Because of the stable half filled configuration of t2g sets Cr3+.
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CBSE 12th Standard Chemistry Subject The d- and f- Block Elements HOT Questions Fill Up Questions With Solution 2021 Answer Keys
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5.92 BM
5.92 BM
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Ce4+ is a good reducing agent because it can readily change to to the most stable oxidation state by gaining one electron. Others cannot do so.
Ce4+ is a good reducing agent because it can readily change to to the most stable oxidation state by gaining one electron. Others cannot do so.
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Because of high hydration enthalpies.
Because of high hydration enthalpies.
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It dissolves in water to give chromic acid.
CrO3 + H2O ⟶ H2CrO4It dissolves in water to give chromic acid.
CrO3 + H2O ⟶ H2CrO4 -
Because of the stable half filled configuration of t2g sets Cr3+.
Because of the stable half filled configuration of t2g sets Cr3+.
