EASY
7th ICSE
IMPORTANT
Earn 100

Define sublimation. Give two examples of substances that show sublimation.

Important Questions on Physical and Chemical Changes

EASY
7th ICSE
IMPORTANT
FRANK NEW CERTIFICATE - Chemistry>Chapter 2 - Physical and Chemical Changes>EVALUATION>Q 1
With the help of an activity, explain the type of change where energy is absorbed.
 
EASY
7th ICSE
IMPORTANT
FRANK NEW CERTIFICATE - Chemistry>Chapter 2 - Physical and Chemical Changes>EVALUATION>Q 2
Why is condensation a physical change? Explain with the help of an activity.
 
EASY
7th ICSE
IMPORTANT
FRANK NEW CERTIFICATE - Chemistry>Chapter 2 - Physical and Chemical Changes>EVALUATION>Q 3
Not all physical changes can be reversed. Give a suitable example to support the statement.
EASY
7th ICSE
IMPORTANT
FRANK NEW CERTIFICATE - Chemistry>Chapter 2 - Physical and Chemical Changes>EVALUATION>Q 1
When solute 'A' dissolves in a solvent, the solution becomes hot and when solute 'B' dissolves in the same solvent, the solution becomes cold. Classify the two changes as exothermic and endothermic. Give reasons to support your answer.