The higher oxidation states of transition elements are found to be in combination with $A$ and $B,$ which are
- A$F, O$
- B$O, N$
- C$O, Cl$
- D$F, Cl$
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Which one of the following ions has the same number of unpaired electrons as those present in $V^{3+}$ ion?
Which of the following alloys is used to make statues?
Assertion : Transition metals show variable valency.
Reason : Transition metals have a large energy difference between the $ns^2$ and $(n-1)d$ electrons.
Reason : Transition metals have a large energy difference between the $ns^2$ and $(n-1)d$ electrons.
MediumAIIMS 2017
View SolutionWhich of the following pairs of ions are both colored in aqueous solution? (Atomic numbers: $Sc = 21, Ti = 22, Co = 27, Ni = 28, Cu = 29$)
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View SolutionAssertion : The free gaseous $Cr$ atom has six unpaired electrons.
Reason : Half-filled $s$ orbital has greater stability.
Reason : Half-filled $s$ orbital has greater stability.
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