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Water drops are spherical because of ?

  • viscosity
  • density
  • polarity
  • surface tension
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1. Air contains maximum amount of

  • oxygen
  • nitrogen
  • hydrogen
  • carbon dioxide

2. Which metal is heaviest ?

  • osmium
  • mercury
  • iron
  • nickle

3. Aspirin is

  • acetyl salicylic acid
  • sodium salicylate
  • methyl salicylate
  • ethyl salicylate

4. Oil of vitriol is

  • nitric acid
  • sulphuric acid
  • hydrochloric acid
  • phosphoric acid

5. The most electropositive elements among the following is :

  • Cs
  • Ca
  • Na
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