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Chemistry

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46. Which is used to produce artificial rain?
 
  • A. sand
  • B. copper oxide
  • C. silver iodide
  • D. silver nitrate
 
47. DDT is an
 
  • A. explosive
  • B. antibiotic
  • C. enzyme
  • D. insecticide
 
 
48. The concept of ellipitical orbitals was suggested by
 
  • A. Thomson
  • B. Neil Bohr
  • C. Rutherford
  • D. Sommerfeld
 
49. Water drops are spherical because of
 
  • A. polarity
  • B. viscosity
  • C. surface tension
  • D. density is one
 
50. Aspirin is
 
  • A. ethyl salicylate
  • B. methyl salicylate
  • C. sodium salicylate
  • D. acetyl salicylic acid