Question

Assertion: Ferrous sulphate crystals are green in colour but on heating, they first turn white and on further heating decompose to leave behind a reddish brown residue. Reason: They turn white due to loss of water of crystallization and the reddish-brown residue is due to formation of Fe2O3.​

Answer 1

Answer:

Both assertion and reason are true and reason is the correct explanation of assertion.

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Answer 2

Answer:

Both the Assertion and Reason are true and the reason is the correct explanation of the Assertion.

Explanation:

On heating, Ferrous sulfate crystals generally tend to lose water, and anhydrous Ferrous Sulfate is formed, so their color changes from green to white.

Since ferrous sulfate crystals contain water molecules such as water of crystallization

This anhydrous white Ferrous sulfate when further heated, decomposes to form Ferric Oxide($Fe_2O_3$) which is reddish-brown in color. Sulfur dioxide and sulfur trioxide are liberated in this process with a burning sulfur-like pungent smell.

hence, Assertion: Ferrous sulfate crystals are green in color but on heating, they first turn white and on further heating decompose to leave behind a reddish-brown residue. is True and Reason: They turn white due to loss of water of crystallization and the reddish-brown residue is due to the formation of Fe2O3.​ Is also a True and correct explanation of the Assertion