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General Knowledge - General Awareness Quiz - Questions and Answers, GK 2013


1. Which of the following neighbouring countries of India has decided to cut the size of its Army by reducing the number of non-combatant personnel?


2. The 2012 DA14, which is in 2013 in news is a ________?


3. Market regulator Securities and Exchange Board of India (SEBI) has formed a panel to recommend norms to curb the menace of insider trading. This panel is headed by:


4. India's Swaran Singh Virk is associated with which of the following sports/games?


5. Which among the following country has been ranked first overall on the World Press Freedom Index 2013?



6. Which among the following team has won the first edition of the Hero Hockey India League?


7. Which among the following department is responsible for the preparation and presentation of Union Budget to the Parliament?


8. 'Naseem Al Bahr' is a biennial Naval Exercise between India and which country?


9. Who among the following is set to head the 'Tax Administration Reforms Commission' of India?


10. Which among the following is the second male cloned buffalo calf in the world?


General Knowledge

1. World Geography -Test-01
2. World Geography -Test-02
3. World Geography -Test-03
4. Geography of India -Test-01
5. Geography of India -Test-02
6. Geography of India -Test-03
7. Geography of India -Test-04
8. Geography of India -Test-05
9. History of India - Test - 01
10. History of India - Test - 02
11. History of India - Test - 03
12. History of India - Test - 04
13. History of India - Test - 05
14. History of India - Test - 06
15. History of India - Test - 07
16. INM-Test-01
17. INM-Test-02
18. INM-Test-03
19. INM-Test-04
20. INM-Test-05
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  • Simple Science

    Wool and Silk Bleaching

    Bleaching:
    Animal fibers like silk, wool, and feathers, and some vegetable fibers like straw, cannot be bleached by means of chlorine, because it attacks not only the coloring matter but the fiber itself, and leaves it shrunken and inferior. Cotton and linen fibers, apart from the small amount of coloring matter present in them, contain nothing but carbon, oxygen, and hydrogen, while animal fibers contain in addition to these elements some compounds of nitrogen. The presence of these nitrogen compounds influences the action of the chlorine and produces unsatisfactory results. For animal fibers it is therefore necessary to discard chlorine as a bleaching agent, and to substitute a substance which will have a less disastrous action upon the fibers. Such a substance is to be had in sulphurous acid. When sulphur burns, as in a match, it gives off disagreeable fumes, and if these are made to bubble into a vessel containing water, they dissolve and form with the water a substance known as sulphurous acid. That this solution has bleaching properties is shown by the fact that a colored cloth dipped into it loses its color, and unbleached fabrics immersed in it are whitened. The harmless nature of sulphurous acid makes it very desirable as a bleaching agent, especially in the home.

    Silk, lace, and wool when bleached with chlorine become hard and brittle, but when whitened with sulphurous acid, they retain their natural characteristics.

    This mild form of a bleaching substance has been put to uses which are now prohibited by the pure food laws. In some canneries common corn is whitened with sulphurous acid, and is then sold under false representations. Cherries are sometimes bleached and then colored with the bright shades which under natural conditions indicate freshness.

    Bleaching with chlorine is permanent, the dyestuff being destroyed by the chlorine; but bleaching with sulphurous acid is temporary, because the milder bleach does not actually destroy the dyestuff, but merely modifies it, and in time the natural yellow color of straw, cotton, and linen reappears. The yellowing of straw hats during the summer is familiar to everyone; the straw is merely resuming its natural color which had been modified by the sulphurous acid solution applied to the straw when woven.


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