A gas at 2 atm pressure occupies 5 L. What is its volume if pressure is increased to 5 atm at constant temperature? MCQ with Answer and Explanation

Explanation:
According to the law of conservation of mass, the mass of a substance remains constant during any physical change, including the interconversion of states. Density, volume, and shape change as the intermolecular spaces and arrangement alter during phase transitions, but the total number of atoms and mass is conserved.

Explanation:
Sulphuric acid (H₂SO₄) was historically called oil of vitriol. Hydrochloric acid was muriatic acid, nitric acid was aqua fortis, carbolic acid is phenol.

Explanation:
Diamond is the hardest known natural substance. It consists of each carbon atom covalently bonded to four other carbon atoms in a rigid tetrahedral 3D lattice, making it extremely hard. Graphite is soft due to its layered structure with weak van der Waals forces between layers.