21. One kilometre is equal to how many miles? September 19, 2025 by Admin A. 0.84 B. 0.5 C. 1.6 D. 0.62 ✅ The correct answer is option D.
22. Who suggested that most of the mass of the atom is located in the nucleus? September 19, 2025 by Admin A. Thompson B. Bohr C. Rutherford D. Einstein ✅ The correct answer is option C.
23. The vast resources of unutilised natural gas can be used in the production of September 19, 2025 by Admin A. graphite B. Synthetic petroleum C. fertilisers D. carbide ✅ The correct answer is option C.
24. The major ingredient of leather is September 19, 2025 by Admin A. collagen B. carbohydrate C. polymer D. nucleic acid ✅ The correct answer is option A.
25. Glass is made of the mixture of September 19, 2025 by Admin A. quartz and mica B. sand and silicates C. salt and quartz D. sand and salt ✅ The correct answer is option B.
26. Which of the following is a protein? September 19, 2025 by Admin A. Natural rubber B. Starch C. Cellulose D. None of these ✅ The correct answer is option A.
27. Wood is the main raw material for the manufacture of September 19, 2025 by Admin A. paint B. paper C. ink D. gun powder ✅ The correct answer is option B.
28. What are the soaps? September 19, 2025 by Admin A. Salts of silicates B. Mixture of glycerol and alcohols C. Sodium or potassium salts of heavier fatty acids D. Esters of heavy fatty acids ✅ The correct answer is option C.
29. Nautical mile is a unit of distance used in September 19, 2025 by Admin A. navigation B. road mile C. astronomy D. measuring the boundaries of a nation ✅ The correct answer is option A.
30. Optic fibres are mainly used for which of the following? September 19, 2025 by Admin A. Musical instruments B. Food industry C. Weaving D. Communication ✅ The correct answer is option D.