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प्रश्न
Explain the environmental effects of chemical reactions?
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उत्तर
Generally, there are three types of pollutions viz air, water, and land pollution. Due to increasing human activities lot of chemical substances are produced artificially which harms all the living and non – living things.
Types of chemical substances and their effects:
| S. No | Type of pollution | Chemical substances responsible for the pollution | Effects |
| 1. | Air pollution | Carbon dioxide, Carbon monoxide, oxides of sulphur, oxides of nitrogen, Chlorofluorocarbons, methane, etc. | Acid rain, Global warming, respiratory problems, etc. |
| 2. | Water pollution | Waste water containing chemical substances (e.g dyeing industries), detergents, oil spillage, etc. | Decrease in quality of water, skin diseases, etc. |
| 3. | Land pollution | Fertilizers like urea, various pesticides, herbicides, etc. | Spoilage of land, cancer, respiratory diseases, etc. |
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संबंधित प्रश्न
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 is tarnishing? Give an example.
Explain how food items are spoiled by chemical reactions?
Explain the role of yeast in making cakes and buns in a bakery?
Do all the fruits and vegetables undergo browning? Explain.
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.
When a magnesium ribbon is burnt in the air, the ash formed is ______.
Reason out
Ozone is produced naturally in the stratosphere.
