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Standard VIII
Chemistry
Question

Assertion :We read in newspapers that burning of fuels is a major cause of global warming. Reason: Burning of fossil fuels is the main cause of CO2 and greenhouse gases.
  1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
  2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
  3. Assertion is correct but Reason is incorrect
  4. Both Assertion and Reason are incorrect

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C
Both Assertion and Reason are incorrect
D
Assertion is correct but Reason is incorrect
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Solution
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Burning of fossil fuels is a main cause of CO2 and greenhouse gases.
Fossil fuels are carbon compounds which when burning in the air releases carbon dioxide gas, the main gas which causes global warming. This gas traps heat rays of the sun inside the surface of the earth and thus increases the temperature.
This is called Greenhouse effect and consequence of this effect is global warming. The temperature of the earth will rise gradually.
Option A is correct.

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