Explanation

• Main Cause: Freon / CFCs
• Effect: Breaks down O₃ molecules → more UV-B radiation
• Other Contributors: Halons, carbon tetrachloride
• Result: Skin cancer, cataracts, climate impact

• The Montreal Protocol (1987) aimed to reduce CFC emissions
• Ozone layer protects Earth from harmful ultraviolet rays

Explanation

• A catalyst speeds up a chemical reaction without being consumed in the process.
• It lowers the activation energy, allowing the reaction to occur faster.

Last verified on 14-11-2026

Explanation

• Sucrose is a disaccharide formed by combining one glucose molecule and one fructose molecule.
• Its chemical formula is C₁₂H₂₂O₁₁.
• Sucrose is commonly known as table sugar.
• It is naturally found in sugarcane and sugar beet.
• The two monosaccharides are joined by a glycosidic bond.

Last verified on 14-11-2026

Explanation

• A barometer measures atmospheric (air) pressure.
• It helps in weather forecasting, detecting storms, and studying climate changes.
• Two common types of barometers: mercury barometer and aneroid barometer.

Last verified on 13-03-2026

Explanation

• Amylase is an enzyme that catalyzes the hydrolysis of starch into sugars.
• All amylases are glycoside hydrolases.
• It is used in breadmaking.

Additional information:

Protease:

• It is an enzyme that catalyzes proteolysis.

Lipase:

• It is an enzyme that catalyzes the hydrolysis of fats.

Peptidase:

• It is an enzyme that breaks down peptides into amino acids.

Last verified on 13-11-2026