Kerala Board Class 10 Science — Flashcards for Quick Revision

A: A spherical mirror is a curved reflecting surface that forms part of a hollow sphere. Two types: (1) Concave mirror - curved inward like inner surface of a spoon, (2) Convex mirror - curved outward li

A: Centre of curvature (C): Centre of the sphere from which the mirror is cut. Pole (P): Geometrical centre/mid-point of the mirror. Principal axis: Horizontal line passing through the centre of curvatur

A: Focus (F): The point on the principal axis where parallel rays of light converge after reflection from a concave mirror. Focal length (f): Distance from the pole to the focus. Relationship: f = R/2 wh

A: A chemical equation is the symbolic representation of a chemical change using chemical symbols and formulae. It shows the reactants on the left side and products on the right side, separated by an arr

A: Reactants are the substances that undergo chemical change in a reaction and are written on the left side of the arrow. Products are the new substances formed as a result of the chemical reaction and a

A: A word equation is a chemical reaction written using the names of substances instead of chemical formulae. Example: calcium oxide + water → calcium hydroxide. It shows the change of reactants to produ

A: Acid-base indicators are dyes or mixtures of dyes that are used to detect the nature of a solution (acidic or basic). They change color in acidic or basic solutions. Examples: 1. Litmus - Red in acid

A: When an acid reacts with a metal, hydrogen gas is evolved along with the formation of a salt. General equation: Acid + Metal → Salt + Hydrogen gas Example: 2HCl + Zn → ZnCl₂ + H₂ The hydrogen gas c

A: A neutralization reaction is the reaction between an acid and a base to form salt and water. General equation: Acid + Base → Salt + Water Example: HCl + NaOH → NaCl + H₂O (Hydrochloric acid + Sodium