21. One kilometre is equal to how many miles?
A. 0.84
B. 0.5
C. 1.6
D. 0.62
✅ The correct answer is option D.
General Science MCQs
22. Who suggested that most of the mass of the atom is located in the nucleus?
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
A. graphite
B. Synthetic petroleum
C. fertilisers
D. carbide
✅ The correct answer is option C.
24. The major ingredient of leather is
A. collagen
B. carbohydrate
C. polymer
D. nucleic acid
✅ The correct answer is option A.
25. Glass is made of the mixture of
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?
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
A. paint
B. paper
C. ink
D. gun powder
✅ The correct answer is option B.
28. What are the soaps?
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
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?
A. Musical instruments
B. Food industry
C. Weaving
D. Communication
✅ The correct answer is option D.