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प्रश्न
Burning of fossil fuels is responsible for global warming. Justify the statement.
उत्तर
The combustion of fossil fuels also releases a large amount of carbon dioxide into the atmosphere. Carbon dioxide is a greenhouse gas which is responsible for global warming. Humans bum fossil fuels, releasing huge amounts of carbon pollution and trapping more and more heat in the atmosphere.
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संबंधित प्रश्न
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?
Explain the role of yeast in making cakes and buns in a bakery?
Do all the fruits and vegetables undergo browning? Explain.
Kumar is going to build a house. To purchase the iron rods required for construction, he visited an iron and steel shop nearby. The seller showed him some iron rods which are fresh and good. He also showed him little older iron rods which are brownish in appearance. The price of fresh rods is more than the older ones. The seller also gave some offers to older ones. Kumar’s friend Ramesh advised him not to buy the cheaper rods.
- Is Ramesh right in his suggestion?
- Could you explain the reason for his suggestion?
- What are the values shown by Ramesh?
When a magnesium ribbon is burnt in the air, the ash formed is ______.
Reason out
Ozone is produced naturally in the stratosphere.
An element ‘A’ on exposure to moist air turns reddish-brown and a new compound ‘B’ is formed. The substance ‘A’ and ‘B’ are:
