Tag: general knowledge

Vitamin C is the correct answer because scurvy is specifically caused by Vitamin C (ascorbic acid) deficiency. Vitamin C is essential for collagen synthesis, and its deficiency leads to weakened blood vessels, bleeding gums, and poor wound healing. Vitamin A deficiency causes night blindness, B deficiency causes beriberi, and D deficiency causes rickets.

Sulphuric Acid is the correct answer because lead-acid batteries (used in automobiles) use dilute sulfuric acid as the electrolyte. The acid reacts with lead plates to produce electrical energy through chemical reactions. Hydrochloric, acetic, and nitric acids are not used in lead storage batteries.

Tomato is the correct answer because it grows above ground and is botanically a fruit (berry), not a root vegetable. Radish, carrot, and potato all grow underground and are root vegetables. Tomatoes develop from the flower and contain seeds, characteristic of fruits.

UNICEF is the correct answer because it is the United Nations International Children's Emergency Fund, specifically dedicated to children's welfare, education, and protection. UNESCO deals with education and culture, UNIDO with industrial development, and UNCTAD with trade and development.

Blood is the correct answer because haemophilia is a genetic blood disorder where blood does not clot properly due to deficiency of clotting factors (Factor VIII or IX). It is not a disease of bone, liver, or kidney, though these organs may be affected secondarily. The primary defect is in blood coagulation.

Fungi is the correct answer because penicillin was first discovered in the Penicillium fungi (mold) by Alexander Fleming. It is not obtained from algae, synthetic substances, or synthetic oil. Most antibiotics are derived from fungi or bacteria, though some synthetic versions exist now.

Hindi is the correct answer because it is not one of the six official languages of the United Nations. The official UN languages are English, French, Russian, Spanish, Chinese, and Arabic. Despite having millions of speakers, Hindi is not an official UN language for official communications and documents.

Nuclear energy is considered a clean energy source as it produces electricity without direct air pollution or greenhouse gas emissions during operation. While hydrogen is also clean, the question specifically mentions reducing air pollution, and nuclear energy is already established as a large-scale alternative to fossil fuels.

When two subjects are joined by 'and', they form a compound subject requiring a plural verb. 'Mala and Vinod' is plural, so the correct verb is 'were' instead of 'was'. This is a subject-verb agreement rule.