Interpretation: The reason for giving a false statement about no change in appearance during physical change needs to be explained.
Concept Introduction: When a substance changes its appearance or change in the state takes place and there is no change in its chemical composition, the change is said to be physical. On the other hand, when there is a change in the chemical composition of a substance or a new substance is formed after a
Explanation of Solution
In a physical change, the composition of a substance remains the same but its appearance changes. Thus, the given statement is false. When water changes from liquid to vapor state, the composition of water that is 2 mol of hydrogen and 1 mol of oxygen remains the same. Only its state changes from liquid to gas. Similarly, on freezing, water gets converted into ice. This also changes its appearance.
Thus, even if there is no change in the composition, the appearance of a substance changes in a physical change.
Chapter 2 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
- Draw and show the full mechanism of how the molecule ((1E, 3E, 5E)-1-methoxyhepta-1,3,5-triene) is built using substitution and elimination reactions. You can start with an alkane of any carbon length with any number of leaving groups attached or with a alkoxide of any carbon length (conjugate base of an alcohol). Show each step and and explanation for each reaction. Also include why the reagents and solvents were picked and what other products can be expected.arrow_forwardDon't USE AIarrow_forwardDon't USE AIarrow_forward
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