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Q. Which compound has electrovalent, covalent, co-ordinate as well as hydrogen bond?

NTA AbhyasNTA Abhyas 2022

Solution:

$\left[\right.Cu\left(\right.H_{2}O\left(\left.\right)_{4}\left]\right.SO_{4}.H_{2}O$ (Blue vitrol) has
(i) electrovalent bond between $Cu^{2 +}$ and $SO_{4}^{2 -}$ ions
(ii) four water molecules are coordinated
(iii) One water molecule is hydrogen bonded to $SO_{4}^{2 -}$ ions.