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Chemistry Questions and Answers

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161. Ruby is an oxide of
 
  • A. silver
  • B. aluminium
  • C. platinum
  • D. gold
 
162. Which metal is commonly used for making an electromagnet?
 
  • A. copper
  • B. iron
  • C. nickel
  • D. cobalt
 
 
163. ---- acid is called king of chemicals.
 
  • A. HCL
  • B. Nitric
  • C. Acetic
  • D. Sulphuric
 
164. The gas that is responsible for global warming is
 
  • A. carbon dioxide
  • B. oxygen
  • C. methane
  • D. sulphur dioxide
 
165. The chemical name of bauxite is
 
  • A. aluminium oxide
  • B. aluminium chloride
  • C. hydrated aluminium oxide
  • D. aluminium sulphite