Class 7 Science MCQs - Chapter 17
Physical and Chemical Changes Quiz Questions & Answers PDF Download - 11
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The Quiz: By heating the color of mixture of sulphur and iron which is yellow turns to; "Physical and Chemical Changes" App (iOS, Android) with answers: Brown; Black; Dark grey; White; to learn online certification courses. Study Iron and Sulphur MCQ Questions, download Amazon eBook (Free Sample) for distance learning.
Physical and Chemical Changes Exam Questions and Answers PDF Download: Test 11
By heating the color of mixture of sulphur and iron which is yellow turns to
- black
- brown
- dark grey
- white
When gas is cooled down, it changes its state into liquid. This is called
- melting
- freezing
- condensation
- sublimation
Polythene was discovered in
- 1733
- 1833
- 1933
- 1633
The odour of ammonia is
- sweet
- attractive
- weak
- strong and pungent
Long chain of atom is linked by
- hydrogen
- oxygen
- nitrogen
- carbon
Class 7 Science Mock Tests
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