Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
Assertion: Methane component of greenhouse gases contributing to global warming is about 20 per cent. Reason: Introduction of multi-point fuel injection engines in automobiles has decreased methane content in the exhausts.A) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.
B) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.
C) If Assertion is true statement but Reason is false.
D) If both Assertion and Reason are false statements.
Correct Answer: B
Solution :
Carbon di oxide \[(C{{O}_{2}})\] contributes about 60% of the total global warming and share of methane \[(C{{H}_{4}})\] and chlorofluoro carbons (CFCs) is 20% and 14% respectively. \[{{N}_{2}}O\] also contributes 6% in total global warming. Efficient engine such as multipoint fuel injection engine can reduce the unburnt hydrocarbon in auto-emissions.
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