Which of the following compounds is expected to be colourless?
- A$ScO$
- B$V_2O_3$
- C$CuCN$
- D$Cr_2(SO_4)_3$
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The highest oxidation state observed in first row transition metals is
An atom with atomic number $21$ belongs to the category of
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View SolutionWhich of the following $3d$-metal ion will give the lowest enthalpy of hydration $(\Delta_{hyd}H)$ when dissolved in water?
How many of the following lanthanide elements exhibit $+4$ oxidation state?
$Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy$
$Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy$
The aqueous solution of which of the following ion is colourless?
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