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Write any four physical properties of base.
  • Bases generally exist in a solid-state, but some bases also exist in a liquid state.
  • Bases give soapy touch only in an .
  • Bases have a  taste.
  • Bases also change the colour of the indicators. When bases are treated with litmus paper, they turn red litmus to blue. Similarly, in a basic medium, methyl orange appears and the colour of phenolphthalein appears .