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, and 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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