The primary active insect-repelling extract utilized in mosquito creams is derived from?
Show answer Hide answer
Answer: B. Neem tree
Explanation
Extracts and oils derived from the neem tree act as effective insect repellents. Azadirachtin is the primary active compound found within neem seeds and leaves. This natural botanical extract deters mosquitoes and other biting pests successfully. The neem tree is a tropical evergreen native to the Indian subcontinent. Botanical repellents offer natural alternatives to synthetic chemical insecticides like DEET. Traditional medicine has utilized neem extracts for centuries across various cultures.
Using natural insect repellents helps prevent mosquito borne diseases in tropical regions. Sustainable agriculture utilizes neem oil as an eco-friendly organic pesticide for crops. Herbal extracts provide chemical diversity for developing new pharmaceutical and household products. Lemon extracts provide refreshing scents but lack the specific insect repellent power of neem. Rice bran yields cooking oils rather than the primary active mosquito repellent extract. Tulsi is valued for medicinal properties but is not the main mosquito repellent source.
- Subject
- Everyday Science
- Category
- Everyday Science
- Topic
- —
- Difficulty
- medium
Related questions
Q1. The standard mass density of pure water is __________?
Show answer Hide answer
Answer: A. 1 g/cm3
Pure water possesses a standard mass density of exactly one gram per cubic centimeter. Metric system definitions originally tied mass and volume standards directly to pure water properties. At maximum density conditions,...
Q2. The orbital separation distance between Earth and the Sun reaches its maximum during ____________?
Show answer Hide answer
Answer: A. Apehelion
Aphelion is the specific point in an elliptical planetary orbit where the body sits furthest from the Sun. Orbital mechanics dictate that speed decreases while distance reaches its absolute maximum at this point. Earth r...
Q3. The linear span separating a convex lens's optical center from its principal focus is termed its_______?
Show answer Hide answer
Answer: A. Focal Length
Focal length is defined as the distance between a lens optical center and its principal focus. Option a correctly names focal length as the linear span measuring this optical property. Rays of light parallel to the princ...
Q4. The Doppler effect applies to phenomena involving_________?
Show answer Hide answer
Answer: C. Both Light waves and sound ways
The Doppler effect describes frequency shifts for any wave phenomenon traveling through a medium. Both sound waves and electromagnetic light waves experience observed frequency changes with relative motion. Wave mechanic...
Q5. The chemical terminology for strong mineral acid (Tezaab) is___________?
Show answer Hide answer
Answer: A. Sulfuric acid
Sulfuric acid is a highly corrosive strong mineral acid widely utilized across many industrial sectors. This chemical compound has historically been referred to by the local vernacular term Tezaab. Its chemical formula i...
Q6. Earth's atmospheric stratification is structured around the vertical gradient of __________?
Show answer Hide answer
Answer: B. Air temperature
Earth atmospheric layers are primarily defined by abrupt changes in vertical temperature gradients. Option b correctly identifies air temperature as the governing factor in atmospheric stratification. Inversion layers an...