Advertisements
Advertisements
Question
Classify the following day-to-day activities based on chemical reactions by physical contact, solutions of reactants, heat, light, electricity, and catalyst.
- Burning of crackers during festivals
- Fading of coloured clothes on drying under sunlight.
- Cooking of eggs.
- Charging of batteries.
Short/Brief Note
Advertisements
Solution
- Chemical reaction.
- Exothermic reaction.
- Tarnishing.
- Rusting.
shaalaa.com
Effects of Chemical Changes: Environmental Effects
Is there an error in this question or solution?
Chapter 10: Changes around us - Exercises [Page 112]
APPEARS IN
RELATED QUESTIONS
A chemical reaction is a temporary reaction.
CFC is a pollutant.
Match the following.
| Spoilage | Decomposition |
| Ozone | Biocatalyst |
| Tarnishing | Oxygen |
| Yeast | Chemical reaction |
| Calcium oxide | Food |
What happens when an iron nail is placed in copper sulphate solution?
What is tarnishing? Give an example.
Explain how food items are spoiled by chemical reactions?
Do all the fruits and vegetables undergo browning? Explain.
Explain the environmental effects of chemical reactions?
When a magnesium ribbon is burnt in the air, the ash formed is ______.
Reason out
Ozone is produced naturally in the stratosphere.
