Tag: basic concepts of chemistry

Questions about the Law of Definite Proportions (Law of Constant Composition), which states that a chemical compound always contains exactly the same proportion of elements by mass.

Questions about laws of constant proportions, multiple proportions, conservation of mass, along with water properties including evaporation, condensation, and composition

Learn about water's composition, states (solid, liquid, gas), evaporation, condensation, and properties for class IX students

importance of chemistry

avogadro hypothesis

measurement of properties

development of chemistry

Tests knowledge of John Dalton's atomic theory including its postulates, merits, and how later discoveries like isotopes disproved certain aspects of the theory