IGCSE O Level Chemistry Practice Test 171
Atoms and Elements Quiz Questions with Answers PDF Download - 171
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Atoms & Elements Quiz with Answers PDF Download: MCQs 171
The most common element in the air is
- hydrogen
- nitrogen
- oxygen
- carbon
Each color is associated with a particular pH in
- litmus indicator
- universal indicator
- methyl orange indicator
- Phenolphthalein indicators
In Oxygen molecule (O2), stability is gained through sharing of
- one electron
- two electrons
- three electrons
- four electrons
Crystallization is used to purify
- sugar only
- fertilizers only
- salt from solution
- sugar and fertilizers
The melting point of the diamond is
- 340 °C
- 3400 °C
- 370 °C
- 3700 °C
IGCSE O Level Chemistry Exam Prep Tests
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