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NEET CHEMISTRYOrganic Chemistry – Some Basic Principles and Techniques Medium

Question

The number of hydrogen bonded water molecules(s) associated with CuSO₄·5H₂O is:

A

3

B

1

C

2

D

5

Step-by-Step Solution

  1. Analyze the Structure: Copper(II) sulphate pentahydrate (CuSO4⋅5H2OCuSO_4 \cdot 5H_2O) has a complex structure. The central Copper ion (Cu2+Cu^{2+}) is coordinated to 4 water molecules forming a square planar coordination entity: [Cu(H2O)4]2+[Cu(H_2O)_4]^{2+}.
  2. Identify Water Types:
  • 4 water molecules act as ligands, forming coordinate bonds with the copper ion.
  • The 5th water molecule acts as a bridge between the [Cu(H2O)4]2+[Cu(H_2O)_4]^{2+} cation and the SO42−SO_4^{2-} anion. It is held in the crystal lattice solely by hydrogen bonds.
  1. Conclusion: Therefore, only 1 water molecule is attached via hydrogen bonding, while the other 4 are coordinated.

Exam Context & Concepts Covered

This question aligns with the NEET CHEMISTRY syllabus, specifically targeting concepts from Organic Chemistry – Some Basic Principles and Techniques . Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.

CHEMISTRYOrganic Chemistry – Some Basic Principles and Techniques numberhydrogenbondedmoleculessassociated

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