Effect of Heat on Ferrous Sulphate Crystals

The video tutorial explores the effect of heat on ferrous sulfate crystals. It begins with an introduction to the crystals and safety measures. The process involves heating the crystals in a test tube using a Bunsen burner, observing color changes, and noting the evolution of colorless, odorless gas. The tutorial explains the chemical reactions, including the breakdown of the crystal structure and the formation of anhydrous ferrous sulfate, ferric oxide, sulfur dioxide, and sulfur trioxide. The inference highlights the transformation from light green crystals to a white amorphous powder.

What is the initial color of ferrous sulphate crystals before heating?

• White

• Dark green

• Light green

• Brown

What is the purpose of using a test tube holder during the experiment?

• To stir the contents

• To protect hands from heat

• To measure the temperature

• To prevent the test tube from breaking

What type of flame is used for heating the ferrous sulphate crystals?

• Neutral flame

• Yellow flame

• Reducing flame

• Oxidizing flame

What is observed on the sides of the test tube during heating?

• Emission of light

• Color change to blue

• Formation of crystals

• Condensation of water vapor

What is the color of the gas evolved during the heating process?

• Blue

• Yellow

• Colorless

• Green

What is the final color of the ferrous sulphate after prolonged heating?

• Light green

• White

• Dark brown

• Red

What is the chemical formula for ferrous sulphate?

• H2O

• SO2

• Fe2O3

• FeSO4

What gases are released during the heating of ferrous sulphate?

• Carbon dioxide and methane

• Hydrogen and helium

• Sulfur dioxide and sulfur trioxide

• Oxygen and nitrogen

What causes the pungent smell during the experiment?

• Release of water vapor

• Formation of ferric oxide

• Burning of the test tube

• Emission of sulfur gases

What happens to the crystal structure of ferrous sulphate upon heating?

• It remains unchanged

• It forms a new compound

• It becomes more stable

• It breaks down