Boyle’s law: $P × V = constant$ (at constant T).

Using lens formula: $1/f = 1/v - 1/u$, solve for u.

Lack of Vitamin D leads to rickets in children.

Right-hand thumb rule determines the field direction.

Sulphur (S) is a non-metal.

Photosynthesis releases oxygen (O₂).

Water freezes at 0°C.

pH 7 represents a neutral solution like pure water.

Sound intensity (loudness) is measured in decibels.

Pepsin breaks down proteins into smaller peptides.

Na donates an electron to Cl, forming an ionic bond.

Formula: $V = IR$

Mitochondria are called the powerhouse of the cell because they generate ATP energy.

Group 1 elements (Li, Na, K, Rb, Cs, Fr) are called alkali metals.

Law of Inertia: A body remains at rest or in uniform motion unless acted upon by an external force.