Maharashtra Board Class 11 Chemistry — Flashcards for Quick Revision

A: Chemistry is the study of matter, its physical and chemical properties, and the physical and chemical changes it undergoes under different conditions. It is called a central science because its knowle

A: Pure substances: Have definite chemical composition and same properties regardless of origin. Examples: Pure metals, distilled water. Mixtures: Have no definite chemical composition and no definite pr

A: Metals: Have lustre, conduct heat and electricity, ductile, malleable. Examples: Gold, silver, copper, iron. Non-metals: No lustre (except diamond, iodine), poor conductors (except graphite), brittle.

A: Analytical chemistry is the branch of chemistry that deals with the study of separation, identification, qualitative and quantitative determination of compositions of different substances. It has two

A: Dry method: Sample under test is not dissolved and is analyzed directly. Usually used as preliminary tests in qualitative analysis. Examples include flame tests, borax bead tests. Wet method: Sample i

A: Scientific notation: 4.56 × 10⁻⁶. The decimal point is moved 6 places to the right, hence the exponent is -6. Number of significant figures: 3 (all non-zero digits 4, 5, 6 are significant).

A: Residue: The insoluble solid particles that remain on the filter paper after filtration. Filtrate: The clear liquid that passes through the filter paper and is collected in the beaker. Example: When f

A: Filtration under suction uses a vacuum pump to create pressure difference, which pulls the liquid through the filter paper more rapidly. The setup includes a Buchner funnel with porous bottom and a th

A: 1. Preparation of saturated solution: Boil crude solid in minimum suitable solvent 2. Hot filtration: Filter hot solution to remove insoluble impurities 3. Cooling of filtrate: Allow solution to cool,