Why is copper sulphate pentahydrate coloured? from Chemist

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

Advertisement

The d-And-f-Block Elements

Short Answer Type

Advertisement

71.
Why is copper sulphate pentahydrate coloured?

In copper sulphate pentahydrate (CuSO_4.5H₂O) copper is divalent (Cu²⁺). Copper(II) have the configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁹An ion or compound is coloured when it has unpaired electron in its d-orbitals. Cu(II) has one unpaired electron in its d-orbital, hence it is coloured.

172 Views

Advertisement

72. Transition metals usually form coloured ions, why?

175 Views

73. Zn, Cd, Hg compounds are usually white. Explain.

411 Views

74. Give one example of any compound in which the oxidation state of Ni is zero.

162 Views

Advertisement

75. Why does V₂O₅ act as catalyst?

262 Views

76. Transition metals form a large number of interstitial compounds. Explain.

527 Views

77. What is an alloy? Name the two types of alloy formed by transition elements. Give one example of a solid solution in relation to a smooth alloy.

185 Views

78. Give two properties in which interstitial compounds differ from its elements.

174 Views

Advertisement

79. What is meant by disproportionation of an oxidation state? Give an example.

195 Views

80. Cu²⁺ is more stable than Cu⁺, Explain.

972 Views

7
8
9

Advertisement