Physical and Chemical Changes App Download | Class 7 Science MCQ PDF e-Book
Class 7 Science Entrance Exam: Practice Test 14 (Chapter 17)
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When solids are heated, they
The change of shape of liquid according to the shape of container is due to
Melting point of 'sulphur' is
To separate the molecules of ethene dichloride, the compound is
For security and military purpose, ammonia is used in
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