Q1
What test identifies oxygen gas?
AGlowing splint relights
BBurning splint gives a pop
CLimewater turns milky
DNo test exists
ICSEClass 10 (ICSE)ChemistryCh 13 · Topic 1
Practical Chemistry
Practical chemistry involves laboratory techniques for identifying gases, testing for ions, and conducting safe experiments following proper
Core concept
Common gas tests include using a glowing splint for oxygen (relights), a burning splint for hydrogen (pop sound), and limewater for carbon dioxide (turns milky).
How it works
Testing for specific cations and anions in solution uses characteristic colour changes and precipitate formations with specific reagents.
Why it matters
Laboratory safety is essential, including proper handling of chemicals, using safety equipment, and understanding hazard symbols on chemical containers.
Key detail
Recording accurate observations and following systematic procedures are essential skills for conducting reliable chemistry experiments.
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Quick notes
• Glowing splint test: relights for oxygen.
• Burning splint test: pop sound for hydrogen.
• Limewater test: turns milky for carbon dioxide.
• Cation/anion tests use characteristic reactions.
• These use colour changes and precipitates.
• Lab safety: proper chemical handling essential.
• Use safety equipment, understand hazard symbols.
• Accurate observation and systematic procedure matter.