Colloids in daily life
Name three examples of colloids used in daily life.
Cleansing action of soaps
How do soaps remove oil and dirt?
Tyndall effect
What is Tyndall effect and where do we see it?
Why does ice feel cold when touched?
Ever wondered why ice feels so cold the moment you touch it?
What makes gases flow and fill any container?
Gases seem to magically spread out everywhere. Why?
Why do we sweat more on humid days?
Even if it’s not that hot, humidity makes us sweaty. What’s happening?
Why do clothes dry faster on windy days?
Same sunlight, but windy days dry clothes quicker. Why?
Can we liquefy gases like oxygen or nitrogen?
Gases are “free”, so how do scientists turn them into liquids?
Why does camphor disappear without melting?
You leave camphor out, and it just vanishes. Where does it go?
What is the reason behind fogging on glass surfaces?
On a cold morning, why do glass windows fog up?
Why is steam more dangerous than boiling water?
Both are at 100°C, but steam burns worse. Why?
Why do we store dry ice in special containers?
Dry ice is just frozen CO₂. Why handle it differently?
Can we smell hot food faster than cold food?
Why does biryani’s aroma reach you faster when it’s hot?
What is the law of conservation of mass?
If we burn wood, doesn’t the mass disappear in smoke?
Why is Avogadro’s number so huge?
6.022×10236.022 \times 10^{23} particles in one mole — why such a big number?
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