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List two advantages of the use of unlead...

List two advantages of the use of unleaded petrol in automobiles as fuel.

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Unleaded petrol does not release lead compounds from exhaust fumes into the atomsphere and caues less pollution .
Unleaded petrol does not emit harmful componds ,It helps in preventing health diseases like bronchits ,asthma and lung diseases .
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XII BOARDS PREVIOUS YEAR-XII BOARDS-SET- I
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  2. Why do children cured by enzyme-replacement therapy for adenosine deam...

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  3. List two advantages of the use of unleaded petrol in automobiles as fu...

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  4. Why do moss plants produce very large number of male gametes ? Provide...

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  5. Select the homologous structures from the combinations given below : ...

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  6. Why are the plants raised through micropropagation termed somaclones ?...

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  7. Explain the different steps involved during primary treatement phase o...

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  8. What is mutualism ? Mention any two examples where the organisms invol...

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  9. List any four techniques where the principle of ex-situ conversion of ...

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  10. State what is apomixis. Write its significance. How can it be commerci...

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  11. During a mohohybrid cross involving a tall pea plant with a dwarf pea ...

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  12. Explain the significance of satellite DNA in DNA fingerprinting techni...

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  13. What does the following equation represent ? Explain . p^(2)+2pq+q^...

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  14. A heavity bleeding and bruised road accident victim was brought to a n...

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  15. Enumerate any six essentials of good ,effective Dairy Farm Management ...

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  16. State the medicinal value and the bioactive molecule produced by strep...

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  17. What are methanogens ? How do they help to generate biogas ?

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  18. Rearrrange the following in the correct sequence to accomplish an impo...

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  19. Describe any three potential applications of genetically modified plan...

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  20. Explain how Eli Lilly, an American company produced insulin by recom...

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