Physical and Chemical Changes MCQ e-Book PDF | Class 7 Science App Download
Class 7 Science Entrance Tests: Practice Test 10 (Chapter 17)
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If there is lack of nitrogen in soil, plants turn
In liquids the intermolecular force of attraction is equal to
The regular arrangement of particles is found in
Hydrogen is obtained by
When the state of matter is changed from liquid to gas, we call it
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