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Which of the following is the most environment-friendly fuel to be used in automobiles?- petrol
- diesel
- natural gas
- petroleum gas
Correct Answer: C. natural gas
Explanation: The use of petrol and diesel as fuels in automobiles is being replaced by CNG because it produces very small amount of harmful gases.
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- Which of the following set of elements is written in order of their increasing metallic character? Be, Mg, CaNa, Li, KMg, Al, SiC, O, N
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