that a change in eoChemicalxample of eachhow that a4. Giving one examplescal change occurs3What is respiration explainObjective QuestionsChoose the correct optionwing is not a reversible change?(b) The melting of iron(d) The burning of kerosene1. Which of the following is reversible(a) The change of water into water vapour(c) The condensation of water vapour2. Which of the following is a desirable changed(a) The rotting of an ess(c) The digestion of food3. During which of the following changes are ne(a) Melting(c) Dissolution4. In which of the following processes does 8(a) Sublimation(c) Photosynthesis5. In which of the following changes is energy derive(a) The freezing of water(d) Rusting(C) Sublimation(b) The spoiling of food(d) The rusting of ironinges are new substances formed?(b) Sublimation(d) BurningOllowing processes does glucose react with oxygen(b) Respiration(d) Rustinging changes is energy derived from sunlight?(b) PhotosynthesisFill in the blanksolid dissolves in a liquid, the volume of the liquid ....... (changes/does not ch1. When a solid dissolves in a liquid, the volume2. The curdling of milk is ...... process. (a reversible/an irreversible)3. The slaking of lime is an ......change. (endothermic/exothermic)4. The molecules of a ...... hide themselves in the intermolecular space of the ....... (solv-5. When burnt, wood forms carbon dioxide and ....... (hydrogen/water vapour)6. Iron combines with oxygen and ...... of the air to form rust. (nitrogen/ moisture)Write 'T' for true and 'F' for false for the following statements.1/A physical change is irreversible.2. A chemical change is reversible.3. The mass of a substance undergoing a physical change is not altered.4. Heat is absorbed when glucose is dissolved in water.5. Heat is evolved when concentrated hydrochloric acid is poured into water.6. A mixture of iron and sulphur undergoes a chemical change when heated.