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Chemistry Questions and Answers

General Science
133. Which one of the following atmospheric gases in highest percentage?
 
  • A. nitrogen
  • B. ozone
  • C. carbon dioxide
  • D. oxygen
 
 
134. What is the lead of a lead pencil is made of?
 
  • A. stone
  • B. carbon
  • C. graphite
  • D. lambblack
 
135. Rare gases are
 
  • A. mono–atomic
  • B. di–atomic
  • C. tri–atomic
  • D. none of the above
 
136. A polymeric substance used to make parachute is
 
  • A. rayon
  • B. cotton
  • C. viscose
  • D. terylene