What Are The Reactions Of Halogens

This video tutorial explores the unique reactions of halogens, focusing on chlorine, iodine, and fluorine. It discusses the industrial use of chlorine reactions to produce bleach, the interaction between chlorine and iodine to form iodine monochloride, and the dangerous properties of hydrofluoric acid, which can dissolve glass. The video also explains the chemistry behind using iodine to test for starch, highlighting its application in detecting fake banknotes.

What are the products formed when chlorine gas is bubbled into cold sodium hydroxide solution?

• Sodium chloride, water, and sodium hypochlorite

• Sodium hypochlorite and oxygen

• Sodium chloride and hydrogen gas

• Sodium hydroxide and chlorine gas

How can you differentiate between iodine monochloride and bromine in a test tube?

• By adding water and observing the color change

• By using a strip of tin metal

• By heating the solution

• By adding sodium hydroxide

Why is hydrofluoric acid not stored in glass containers?

• It is not reactive enough

• It evaporates quickly

• It is too expensive

• It reacts with silicon dioxide in glass

What is the industrial use of hydrofluoric acid?

• Etching patterns on glass

• Bleaching fabrics

• Neutralizing bases

• Producing fertilizers

What causes the intense dark blue-black color when iodine is added to starch?

• Interaction of triiodide ions with starch

• Presence of glucose

• Reaction with water

• Formation of iodine gas