Which one of the following is used in preparing a natural mosquito repellent?

Q: What is UPSC Prelims?

UPSC Prelims is a competitive examination conducted in India. This question is from the 2021 UPSC Prelims Environment & Ecology paper.

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To prepare for UPSC Prelims Environment & Ecology, practice previous year questions (PYQs), understand concepts thoroughly, and solve mock tests regularly. This 2021 question covers Invasive Species, Microplastics & Emerging Threats topic.

Q: What is the difficulty level of this question?

This UPSC Prelims 2021 Environment & Ecology question has a easy difficulty level.

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Question

Which one of the following is used in preparing a natural mosquito repellent?

Accepted Answer

Correct Answer: C — LemongrassStep-by-step Solution:Lemongrass (Cymbopogon citratus) contains citronella oil, which is registered with the FDA as a natural mosquito repellent. Citronella is widely used in candles, sprays, lotions, and planted along walkways to deter mosquitoes. ✓Why other options are incorrect:Option A (Congress grass — Parthenium hysterophorus): Invasive weed that causes allergies and dermatitis; not used as mosquito repellent.Option B (Elephant grass — Pennisetum purpureum): Used as fodder and biofuel; not a mosquito repellent.Option D (Nut grass — Cyperus rotundus): Considered a weed; some traditional uses but not for mosquito repellent.Key Concept: Natural mosquito repellents include: citronella (lemongrass), neem oil, eucalyptus oil, lavender, peppermint, and marigolds. They are safer alternatives to chemical repellents like DEET. India is a major producer of lemongrass oil, used in aromatherapy, soaps, and insect repellents.

Which one of the following is used in preparing a natural mosquito repellent?

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Which one of the following is used in preparing a natural mosquito repellent?

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More Questions from Invasive Species, Microplastics & Emerging Threats

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