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Chemistry (Civil Service Examination), Questions and Answers, GK for UPSC, Bank PO & All Exams


1. A radioactive substance has a half-life of four months. Three-fourth of the substance would decay in [2001]


2. Most of the explosions in mines occur due to the mixing of


3. Barium in a suitable form is administered to patients before an X-ray examination of the stomach, because [1999]


4. Consider the following statements: Hard water is not suitable for [2000]
1. drinking
2. washing clothes with soap
3. use in boilers
4. irrigating crops
Which of these statements are correct?


5. Match List 1 with List II and select the correct answer using the codes given below the lists: [1998]
List-I - List-II
A. Potassium bromide - 1. Fertiliser
B. Potassium nitrate - 2. Photography
C. Potassium sulphate - 3. Bakery
D. Monopotassium tartarate - 4. Gun powder Codes:



6. The alpha particle carries two positive charge. Its mass is very nearly equal to that of [1996]


7. Which one of the following metals does not form amalgam? [1998]


8. Match List I with List II and select the correct answer using the codes given below the lists: [2001]
List-1 (Characteristic)
A. Zero mass
B. Fractional charge
C. Fractional spin
D. Integral spin
List-II (Particle)
1. Positron
2. Neutrino
3. Quark
4. Photon
Codes:


9. With reference to ionic compounds, consider the following statements: [2003]
1. Ionic compounds are insoluble in alcohol.
2. Ionic compounds in the solid state are good conductor of electricity.
Which of these statements is/are correct?


10. Cobalt-60 is commonly used in radiation therapy because it emits [1999]


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
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12. History of India - Test - 04
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14. History of India - Test - 06
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16. INM-Test-01
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18. INM-Test-03
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20. INM-Test-05
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