A student strongly heats hydrated ferrous sulphate salt in a dry test-tube. He would observe a :
(1) yellow residue (2)brown residue
(3)light green residue (4) white residue
"

Correct answer: (2) brown residue

Explanation: Ferrous sulphate is a hydrated salt that has blue-green colour. On heating in a dry test tube, it will lose its water molecules and become anhydrous Fe₂O₃ which is reddish-brown in colour.

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Updated on: 10-Oct-2022

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(1) yellow residue	(2)brown residue
(3)light green residue	(4) white residue

A student strongly heats hydrated ferrous sulphate salt in a dry test-tube. He would observe a :(1) yellow residue(2)brown residue(3)light green residue(4) white residue"

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A student strongly heats hydrated ferrous sulphate salt in a dry test-tube. He would observe a :
(1) yellow residue (2)brown residue
(3)light green residue (4) white residue
"