1. Ozone layer maintained in proper nature could restrict ___
Ultraviolet radiation
2. Important cause of global warming is discharge of ___
Chlorofluorocarbons
3. Largest potential of nonconventional energy may be found in ___
Solar power
4. ‘CAD’ programme in computer is associated with ___
Designs
5. ‘DTP’ programme is highly helpful for ___
Publishers
6. To improve computer functioning initial research activities were done mostly by ___
IBM
7. How many digits are associated with Binary code in computer system ___
2
8. ‘Bit’ an abbreviation of binary digit may be ___
Any one from 0 and 1
9. Computer chips are mainly made of ___
Silicon
10. The stored memory of which cannot be changed in normal computer operation?
ROM
11. By which company personal computer named ‘Macintosh’ was marketed in 1984?
Apple
12. ‘Silicon Valley’ an important computer related manufacturing zone is in___
USA
13. Country having highest volume of Business Process Outsourcing (BPO) jobs in the present world is ___
India
14. On which information cannot be written by the computer operator?
ROM
15. Around how many Bytes may be there within a ‘Megabyte’?
10 lakh
16. In Binary system 15 is coded as ___
1111
17. In computer system ‘pixels’ refer to ___
Dots
18. The most commonly used High Density (HD) floppy diskette in modern computer has got radius of ___
5 inches
19. ‘Nichrome’ wire used in electric heater has got no mixture of ___
Copper
20. In electric candle the burning wire is kept inside a bag made of ___
Mica
21. The density of air in relation to the density of hydrogen is ___
4 times
22. Phosphoric acid is ___
Tribasic
23. Scientist Sandwick discovered ___
Neutron
24. Oxygen may be converted into Solid state at a temperature of ___
-219° C
25. Water mixture of which is not an electrolyte?
Sugar
26. Xray cannot penetrate through ___
Lead
27. The normal cholestrol level in human blood is ___
200 milligrams per deciliter (mg/dl) (which are considered desirable for adults)
28. Galvanisation of iron is carried out using ___
Bath of molten zinc
29. Uranium eventually decays into a stablle isotope of ___
Lead
30. The tip of the match stick contains ___
potassium chlorate (Safety matches ignite due to the extreme reactivity of phosphorus with the potassium chlorate in the match head)