Class 7 Science MCQs - Chapter 17
Physical and Chemical Changes Quiz Questions & Answers PDF Download - 27
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Physical and Chemical Changes Exam Questions and Answers PDF Download: Test 27
The density of 'solids' is
- lower than liquids but higher than gases
- higher than liquids but lower than gases
- higher than both liquids and gases
- lower than both liquids and gases
When methane is combusted, it combines with
- carbon dioxide
- oxygen
- hydrogen
- nitrogen
The new form of 'polythene' is called
- polypropene
- polybutene
- high density polyethene
- low density polyethene
The shape of 'gas' is
- indefinite
- definite
- indescribable
- dependent on air humidity
The short form of "Polyvinyl chloride" is
- PVCl
- PViCl
- PVC
- PoViCl
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