MCQ
The correct formula of diammine dichlorodicyano chromate $(III)$ is
- ✓$[CrCl_2(CN)_2(NH_3)_2]^{3+}$
- B$[CrCl_2(CN)_2 (NH_3)_2]^{3-}$
- C$[CrCl_2 (CN)_2(NH_3)_2]$
- D$[CrCl_2(CN)_2(NH_3)_2]^-$
✓
Answer
Correct option: A.
$[CrCl_2(CN)_2(NH_3)_2]^{3+}$
a
The size of $[Al(H_2O)_6]^{3+}$ is smaller than $[Mg(H_2O)_6]^{2+}$. Also, the former possesses more effective nuclear charge and thus, attracts electron pair from donor more effectively. This gives rise to relatively strong acidic nature of $[Al(H_2O)_6]^{3+}.$
The size of $[Al(H_2O)_6]^{3+}$ is smaller than $[Mg(H_2O)_6]^{2+}$. Also, the former possesses more effective nuclear charge and thus, attracts electron pair from donor more effectively. This gives rise to relatively strong acidic nature of $[Al(H_2O)_6]^{3+}.$
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