Questions and Answers on Science and Technology

General Science questions and answers with tests for practice . These questions not only develop your I.Q. but will useful for upcoming government exams also.

1. Which of the following is the best conductor of electricity ?
A. Copper
B. Mica
C. Zinc
D. Silver

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2. Soda water contains–
A. Nitrous acid
B. Carbonic acid
C. Carbon dioxide
D. Sulphuric acid

3. Which of the following is basis of the modern periodic table ?
A. Atomic mass
B. Atomic number
C. Atomic size
D. Atomic volume

4. Of the following metals, which one pollutes the air of a big city ?
A. Copper
B. Cadmium
C. Lead
D. Chromium

5. Bell Metal is an alloy of–
A. Brass and Nickel
B. Zinc and Copper
C. Tin and Copper
D. Nickel and Copper

6. The high temperature superconductors are–
A.Metal alloys
B.Ceramic oxides
C. Inorganic polymers
D. Pure rare earth metals

7. The ingredients of Gun metal are
A. Iron, tin
B. Copper, tin
C. Iron, brass, tin
D. Iron, zinc, titanium

8. The neutral atom’s two isotopes differ in the number of–
A. Electron shells
B. Protons
C. Valence electrons
D. Neutrons

9. Optical fibres are mainly used in 
A. Communication
B. Weaving
C. Musical Instruments
D. Food Industry

10. The first synthetic fibre made by man was–
A. Rayon
B. Nylon
C. Polyester
D. Terycott

11. Polythene is industrially prepared by the polymerization of–
A. Methane
B. Styrene
C. Acetylene
D. Ethylene

12. A mixture of water and alcohol can be separated by–
A. Filtration
B. Evaporation
C. Distillation
D. Decantation

13. A substance which changes readily into vapour without heating is called–
A. Efflorescent
B. Synthetic
C. Volatile
D. Effervescent

14. German biochemist, Emil Fischer 
A. gave Operon model
B. compared the fit between enzyme substrate to lock and key
C. proposed the theory of competitive inhibition
D. proposed the feed back inhibition theory

15. Enzymes generally have–
A. same pH and temperature optima
B. same pH but different temperature optima
C. different pH but same temperature optima
D. different pH and temperature optima

16. Coenzyme is–
A. always protein
B. often metal
C. always inorganic compound
D. often a vitamin

17. Cholesterol is one kind of–
A. Saturated fatty acid
B. unsaturated fatty acid
C. Steroid
D. Diglyceride

18. Ethyl-alcohol is mixed completely with water. How ethyl alcohol is separated from the mixture ?
A. by separation flannel
B. by evaporation
C. partial-distillation
D. evaporation of water

19. White vitriol is–
A. FeSO4, 7H2O
B. ZnSO4, 7H2O
C. MgSO4, 7H2O
D. CuSO4, 7H2O

20. Combustion is a process by which–
A. heat is produced
B. light is produced
C. heat and light both are produced
D. None of these

21. Which of the following is the best conductor of Electricity ?
A. Ordinary water
B. Sea water
C. Boiled water
D.Distilled water

22. Balloons are filled with–
A. Helium
B. Oxygen
C. Nitrogen
D. Argon

23. The charcoal used to decolourise raw sugar is–
A. Animal charcoal
B. Sugar charcoal
C. Cocoanut charcoal
D. Wood charcoal

24. Washing soda is the common name of–
A. Calcium Carbonate
B. Calcium Bi-Carbonate
C. Sodium Carbonate
D. Sodium Bi-Carbonate

25. The filament of electric bulb is made of–
A. Iron
B. Nichrome
C. Tungsten
D. Graphite

26. Bleaching powder is made from 
A. Sulphur dioxide and gypsum
B. Chlorine and Charcoal
C. Soda ash and lime
D. Lime and Chlorine

27. Brass is an alloy of–
A. Nickel and Copper
B. Copper and Silver
C. Nickel and Zinc
D. Zinc and Copper

28. The element required for Solar energy conversion–
A. Beryllium
B. Silicon
C. Tantalum
D. Ultra pure carbon

Questions and Answers on Science and Technology

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