Class 7 Science MCQs - Chapter 18
Physical and Chemical Changes Trivia Questions and Answers PDF - 28
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Physical and Chemical Changes Questions & Answers PDF Download: MCQ Quiz 28
MCQ 136: 'Plastic' is made of
- amines
- alkanes
- hydrocarbons
- alcohols
MCQ 137: The essential mineral for plants other than ammonia, is
- potassium
- sodium
- phosphorus
- uranium
MCQ 138: 'Liquids' flow
- only if boiled
- hardly
- more than solids but less than gases
- more than gases but less than solids
MCQ 139: The common products in which ammonia is used, are
- lubricants
- detergents
- perfumes
- deodorants
MCQ 140: In mixture, the particles of iron and sulphur are
- separate
- chemically bonded
- biologically bonded
- permanently bonded
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