Gas as Fuel
LPG and natural gas for cooking; clean flame.
Gas as Fuel
Gas as Fuel
What you'll learn
- LPG and natural gas cook food on gas stoves.
- Clean blue flame when adjusted properly.
- Gas stored in cylinder under pressure.
- Looking Around 3 — modern kitchen safety at home.
Key concepts
Level 1 — Core idea
Verbal: Turn knob — gas flows, spark lights blue flame under pan.
Symbolic: Gas + oxygen → flame + heat (+ water vapour, CO₂ when complete).
Visual: Stove: cylinder → pipe → burner → flame under pot.
Level 2 — Going deeper
Yellow flame may mean incomplete burning — adjust air or ask adult. Smell added to LPG so leaks can be detected.
NCERT anchor
NCERT Looking Around 3 home discussions include LPG safety posters. Never play with stove knobs.
Worked example
Why prefer gas for city cooking?
Step 1 — Quick, adjustable **flame**
Step 2 — No heavy wood to store indoors
Step 3 — Still need **ventilation** ✓
Blue vs yellow flame — which better?
Step 1 — **Blue** usually cleaner, hotter burn
Step 2 — Yellow may mean soot — tell adult
Answer: aim for **steady blue** with supervision
Common mistakes
| Mistake | Why | Fix |
|---|---|---|
| Leave gas knob on | Forget after cooking | Turn off knob every time |
| Light match before checking smell | Leak danger | Tell adult if smell gas |
| Gas has no smell naturally | Think no leak sign | LPG has added smell for safety |
| Flame color doesn't matter | Any fire OK | Yellow may warn incomplete burn |
Quick check
- Name one gas used at home.
- What colour is a good flame?
- Where is gas stored?
- Stretch: Why kitchen needs window open while cooking?
Revision tip: After cooking checklist: flame off? knob tight? no smell?
Open the Practice tab for graded questions on Gas as Fuel.
Key Takeaways (TL;DR)
- What you'll learn
- Key concepts
- Worked example
- Common mistakes
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