Physical and Chemical Changes - Class 7 Science
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Q1 · MCQ · 1 mark
Which of the following is an example of a physical change?
Q2 · FILL · 1 mark
A change in which a new substance is formed is called a ________ change.
Q3 · SHORT · 2 marks
What is the key difference between a physical change and a chemical change?
Q4 · MCQ · 1 mark
Which of the following indicates a chemical change has occurred?
Q5 · FILL · 1 mark
The process of iron reacting with oxygen and water to form iron oxide is known as ________.
Q6 · SHORT · 2 marks
Give one example of a physical change that is reversible.
Q7 · MCQ · 1 mark
Which of these is generally an irreversible change?
Q8 · FILL · 1 mark
When magnesium ribbon is burned in air, it forms a white powder called magnesium ________.
Q9 · SHORT · 2 marks
Why is the digestion of food considered a chemical change?
Q10 · MCQ · 1 mark
Which of the following is not a characteristic of a physical change?