EASY
7th CBSE
IMPORTANT
Earn 100
Study the given Venn diagram:
Points 1, 2, 3 and 4 represent
50% studentsanswered this correctly
Important Questions on Physical And Chemical Changes
EASY
7th CBSE
IMPORTANT
Rajni has classified a few changes around us as shown in the table.
| S. No. | Change | Type of Change |
| 1 | Browning of sliced brinjal | Physical irreversible change |
| 2 | Getting pure crystals of a copper sulphate from a saturated solution of copper sulphate | Physical, reversible |
| 3 | Baking a cake | Chemical, reversible |
| 4 | Respiration | Chemical, irreversible |
| 5 | Making sugar solution | Physical, reversible |
The changes classified correctly are
EASY
7th CBSE
IMPORTANT
Observe the given experimental set-up.
Which of the following represents the correct observation?
EASY
7th CBSE
IMPORTANT
EASY
7th CBSE
IMPORTANT
Which of the following statements is/are correct?
I. Manure formation from leaves is a chemical change.
II. Chemically iron and rust are same.
III. Breakdown of ozone to oxygen is a chemical change.
IV. Zinc coated iron pipes rust easily.
EASY
7th CBSE
IMPORTANT
When silver bromide is exposed to light, it forms silver metal and bromine vapours. This reaction comes under which of the following category?
EASY
7th CBSE
IMPORTANT
EASY
7th CBSE
IMPORTANT
EASY
7th CBSE
IMPORTANT
