Eureka Classes

Photosynthesis is the process by which green plants use sunlight, carbon dioxide, and water to produce glucose and oxygen. Glucose serves as food for the plant. To test for the presence of starch (formed from glucose), we use the iodine test—leaves turn blue-black, indicating successful photosynthesis.

Water exhibits anomalous behavior due to its unique molecular structure. It expands upon freezing, making ice less dense than liquid water, and has a high boiling and melting point relative to its molecular weight. Its density peaks at 4°C. These properties arise from hydrogen bonding, crucial for Earth’s climate and life.