IGCSE A Level Chemistry Practice Test 240
Elements and Atoms Multiple Choice Questions (MCQs) PDF Download - 240
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Elements and Atoms MCQ Quiz with Answers PDF Download: Test 240
The most composition of sun is mainly
- oxygen and hydrogen
- hydrogen
- hydrogen and helium
- helium
A sigma bond (σ-bond) is formed when
- p-orbital overlaps with another p-orbital
- s-orbital overlaps with another s-orbital
- p-orbital overlaps with a s-orbital
- d-orbital overlaps with f-orbital
Collision theory helps to explain the effects of
- concentration
- temperature
- surface area
- all of above
Sodium reacts vigorously with
- water
- metals
- gases
- none of above
Excess acids in the stomach can be neutralized through
- Ca(OH)2
- Mg(OH)2
- MgO
- CaO
IGCSE A Level Chemistry Exam Prep Tests
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College Chemistry Practice Questions
- Ionic solids at room temperature usually exist in
- Number of atoms or molecule present in one molar mass of an entity is known as
- When molten crystalline solids are cooled rapidly particles do not have
- Element which shows allotropy is
- Thing collected at bottom of expansion chamber in Linde's method is