SSC Chemistry Previous year questions Set 5

41. Which one of the following metals pollutes the air of a city having large number of automobiles?[SSC CGL Prelim 2000]
A. Cadmium
B. Chromium
C. Lead
D. Copper
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42. Which of the following is chiefly present in LPG (Liquefied Petroleum Gas) ? [SSC CPO Sub-Inspector 2003]
A. Methane
B. Ethane
C. Propane
D. Butane
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43. What is the most commonly used substance in fluorescent tubes?[SSC CGL Prelim 2003]
A. Sodium oxide and argon
B. Sodium vapour and neon
C. Mercury vapour and argon
D. Mercury oxide and neon
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44. The major harmful gas emitted by automobile vehicle which causes air pollution is – [SSC CPO Sub-Inspector 2003]
A. Carbon Monoxide
B. Methane
C. Carbon dioxide
D. Ozone gas
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45. Galvanization is the : [SSC CGL Prelim 2002]
A. deposition of zinc on iron
B. deposition of tin on iron
C. deposition of copper on iron
D. deposition of aluminium on iron
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46. The acid used in lead storage cells is – [SSC CPO Sub-Inspector 2003]
A. phosphoric acid
B. hydrochloric acid
C. nitric acid
D. sulphuric acid
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47. Galvanised iron is made by coating iron with [SSC CPO Sub-Inspector 2004]
A. Zinc
B. Nickel
C. Chromium
D. Sulphur
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48. Which of the following is not a precious/semi-precious stone?[SSC Section Officer (Commercial Audit) 2003]
A. Sapphire
B. Ruby
C. Pearl
D. Emerald
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49. The enzyme that converts glucose to ethyl alcohol is : [SSC CGL Prelim 2002]
A. Invertase
B. Maltase
C. Zymase
D. Diastase
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50. Bauxite is an alloy of which of the following metals ? [SSC Section Officer (Audit) 2003]
A. Aluminium
B. Silver
C. Tin
D. Iron
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