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Chemistry Questions and Answers

General Science
45. Biogas mainly contains
 
  • A. oxygen
  • B. nitrogen
  • C. carbon dioxide
  • D. methane
 
 
46. Baking soda is
 
  • A. potassium carbonate
  • B. sodium hydroxide
  • C. sodium bicarbonate
  • D. sodium carbonate
 
47. The nature of bonding in organic compound is
 
  • A. metallic
  • B. covalent
  • C. ionic
  • D. coordinate
 
48. The iron layered with zinc is called
 
  • A. pig iron
  • B. cost iron
  • C. steel
  • D. galvanised iron