GENERAL KNOWLEDGE

Detailed explanation-1: -Hydrogen (H2) is not soluble in water this is because hydrogen is a non-polar molecule whereas water is a polar molecule.

Detailed explanation-2: -Lipids are chemical substances that are nonpolar in nature. Because water is a polar molecule, they are only soluble in nonpolar solvents and insoluble in water. These molecules can be produced in the human body and are found in oil, butter, whole milk, cheese, fried meals, and some red meats.

Detailed explanation-3: -Hence the correct option is option(b)-charcoal.

Detailed explanation-4: -In general, neutral lipids are soluble in organic solvents and are not soluble in water.

Detailed explanation-5: -They are water insoluble. Lipids are non-polar molecules while water is polar molecule, so there is no way for water to attach to a lipid molecule. Instead, the non-polar lipids will bind to themselves, which is why oils and fats form droplets on the surface of water.