This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
ScanSolve AI Answer
Here's the classification of the processes: (a) Beating of aluminium metal to make aluminium foil: This is a physical change* because the chemical composition of aluminium remains the same; only its shape changes. (b) Digestion of food: This is a chemical change* because complex food molecules are broken down into simpler substances through chemical reactions. (c) Cutting of a log of wood into pieces: This is a physical change* because the wood is merely divided into smaller pieces; its chemical nature does not change. (d) Burning of crackers: This is a chemical change* because burning involves combustion, which produces new substances like gases, ash, and light/heat. Based on this, the classification is: Physical changes: (a), (c) Chemical changes: (b), (d) Comparing this with the given options: A. Physical: (a), (c); Chemical: (b), (d) B. Physical: (a), (b); Chemical: (c), (d) C. Physical: (a), (c), (d); Chemical: (b) D. Physical: (c) only; Chemical: (a), (b), (d) The correct option is A. The final answer is A That's 2 down. 3 left today — send the next one.