SSC Chemistry Previous year questions Set 3

21. The radio-active element used in heart pacemakers is – [SSC Section Officer (Audit) 2001]
A. Uranium
B. Deuterium
C. Plutonium
D. Radium
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22. Which among the following elements is found in maximum percentage in the human body ?[SSC Section Officer (Audit) 2003]
A. Carbon
B. Hydrogen
C. Nitrozen
D. Oxyzen
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23. Commercial nitric acid is coloured because it contains dissolved : [SSC CGL Prelims 2000]
A. Oxygen
B. Nitrous oxide
C. Nitrogen dioxide
D. Coloured impurities
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24. Which of the following is ozone depleting pesticide ?[SSC CPO Sub-Inspector 2004]
A. D.D.T.
B. Benzene
C. Methyl bromide
D. Ethylene ozonide
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25. What is the name of that system, which uses radioactivity to decide the period of materials of-pre-historic period ? [SSC Section Officer (Audit) year 1997]
A. Radium dating
B. Uranium dating
C. Carbon dating
D. Deuterium dating
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26. The most suitable vessel for storing concentrated sulphuric acid is_ [SSC Tax Assistant (Income Tax & Central Excise 2004]
A. Copper vessel
B. Aluminium vessel
C. Glass vessel
D. Earthen vessel
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27. Which among the following coal contains 90 per cent of carbon? [SSC Section Officer (Audit) 2003]
A. Anthracite
B. Bitumen
C. Lignite
D. Peat
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28. Milk is a colloidal system in which: – [SSC CGL Prelim 2002]
A. Water is dispersed in fat
B. Fat is dispersed in water
C. Fat and water are dispersed in each other
D. Fat is dissolved
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29. Where does the oxygen that keeps us alive come from? [SSC CGL Prelim 2000]
A. Carbon dioxide
B. Carbonates absorbed from soil
C. Oxides of minerals
D. Water
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30. The long range potential of nuclear energy in India depends on its reserves of ___ [SSC Tax Assistant (Income Tax & Central Excise) 2004]
A. thorium
B. uranium
C. plutonium
D. radium
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