MP Board · Class 7 · Science · Physical and Chemical ChangesWhich of the following is a physical change?
Step-by-Step Solution
A physical change is a reversible change in which no new substance is formed. Melting of wax is a physical change because only the state of matter changes from solid to liquid, and it can be solidified back into wax without changing its chemical composition.
Detailed Options Breakdown
Option : Rusting of iron
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Physical and Chemical Changes.
Option 1: Melting of wax (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 2: Burning of paper
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Physical and Chemical Changes.
Option 3: Digestion of food
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Physical and Chemical Changes.
💡 Study Guide: This question tests core syllabus concepts from Physical and Chemical Changes. For formulas, key summaries, and mock exam reference guides, read the full Physical and Chemical Changes Revision Notes.