Class 7 Science MCQs - Chapter 18
Physical and Chemical Changes Quiz Questions and Answers PDF - 11
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Free Physical and chemical changes Quiz Questions and Answers PDF, physical and chemical changes Quiz PDF download, e-Book Ch. 18-11 to study class 7 science online courses. Download Iron and Sulphur MCQs PDF, physical and chemical changes quiz questions and answers to learn online certification courses. The Physical and Chemical Changes Quiz App Download: Free learning app for iron and sulphur, physical changes, polythene, making ammonia, making plastics test prep for online schools.
The Quiz: By heating the color of mixture of sulphur and iron which is yellow turns to; "Physical and Chemical Changes" App Download iOS & Android (Free) with answers brown, black, dark grey and white to learn online certification courses. Study iron and sulphur quiz questions, download Amazon eBook (Free Sample) for distance learning.
Physical and Chemical Changes Questions & Answers PDF Download: MCQ Quiz 11
MCQ 51: By heating the color of mixture of sulphur and iron which is yellow turns to
- black
- brown
- dark grey
- white
MCQ 52: When gas is cooled down, it changes its state into liquid. This is called
- melting
- freezing
- condensation
- sublimation
MCQ 53: Polythene was discovered in
- 1733
- 1833
- 1933
- 1633
MCQ 54: The odour of ammonia is
- sweet
- attractive
- weak
- strong and pungent
MCQ 55: Long chain of atom is linked by
- hydrogen
- oxygen
- nitrogen
- carbon
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