Question

list any two observations when ferrous sulphate is heated in a dry test tube ka answerno​

Answer 1

Answer:

When ferrous sulphate is heated colour changes from light green to reddish brown. On further heating, ferrous sulphate decomposes to form ferric oxide (Fe2O3), sulphur dioxide (SO2) and sulphur trioxide (SO3).

Answer 2

The two observations when ferrous sulphate is heated in a dry test tube are:

1. The change of color from green to brown and on continuous heating, from brown to white.

2. Burning Smell.

Explanation:

• We know, During the thermal decomposition of Ferrous sulfate crystals, they lose water to form anhydrous ferrous sulfate. On further heating, anhydrous Ferrous Sulfate decomposes to form ferric oxide, sulfur dioxide and sulfur trioxide.

• The First observation is the change of color from green to brown and on continuous heating, from brown to white. This is because ferrous sulphate becomes anhydrous ferrous sulphate and then ferric oxide.

• The second observation is the burning odor due to emission of sulfur dioxide gas.