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Question

Which of the following substances is green in colour?


A

(FeSO4.7H2O)

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B

(CuSO4.5H2O)

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C

(ZnSO4.7H2O)

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D

(Na2CO3.10H2O)

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Solution

The correct option is A

(FeSO4.7H2O)


The explanation for the correct options

A. (FeSO4.7H2O)

  • The IUPAC name of this substance is Ferrous Sulphate hepta hydrate.
  • Colour of this salt is green in presence of water.

The explanation for the incorrect options

B. (CuSO4.5H2O)

  • The IUPAC name of this substance is Copper Sulphate penta hydrate.
  • Colour of this salt is blue in presence of water.

C. (ZnSO4.7H2O)

  • The IUPAC name of this substance is Zinc Sulphate hepta hydrate.
  • Colour of this salt is white in presence of water.

D. (Na2CO3.10H2O)

  • The IUPAC name of this substance is Sodium Carbonate deca hydrate.
  • It is also known as washing soda.
  • Colour of this salt is white in presence of water.

Hence option (A) is correct, Ferrous Sulphate hepta hydrate (FeSO4.7H2O) is green in colour.


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