A. Methane
B. Ethane
C. Butane
D. Propane
42. Which of the following bases is involved
in the making of soap.?
A. Baking
soda
B. Ammonia
C. Washing
soda
D. Caustic soda
43. Which on of the following has the same
atomic number and atomic weight.?
A. Helium
B. Oxygen
C. Nitrogen
D. Hydrogen
44. The purest from of iron is.?
A. Wrought iron
B. Pig iron
C. Cast iron
D. Stainless
steel
45. The most malleable metal is .?
A. Platinum
B. Gold
C. Silver
D. Iron
46. The major constituent of air is.?
A. Carbon
dioxide
B. Oxygen
C. Hydrogen
D. Nitrogen
47. The first metal to be used by man was
A. Aluminum
B. Silver
C. Iron
D. Copper
48. What is the only element that normally
has no neutrons.?
A. Oxygen
B. Krypton
C. Neon
D. Hydrogen
49. The development of the ultra microscope
makes use the of the.?
A. Edison
effects
B. Tyndall effect
C. Brownian
motion
D. None of
above
50. Which of the following elements is found
in all organic compounds.?
A. Calcium
B. Nitrogen
C. Oxygen
D. Carbon
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