1. Glucose contains polar hydroxyl (-OH) groups which can interact with the polar water molecules through hydrogen bonding. These hydrogen bonds between glucose and water molecules increase the solubility of glucose.
2. Glucose has a relatively low molecular weight and does not have a significant hydrophobic region. This means that glucose does not disrupt the water structure significantly and can dissolve easily in water.
3. Water is a polar solvent, and glucose is also polar. Polar substances are generally soluble in polar solvents like water.
4. Glucose is a small carbohydrate, and its molecules are able to mix effortlessly with water without interfering with the water structure, resulting in its high solubility in water.