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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3sc220

For emulsions, select the correct statement(s) about the type of the emulsion.

  1. AA water-in-oil emulsion can be diluted with benzene (an oil) without breaking, since oil is its continuous phase.
  2. BA water-in-oil emulsion has much poorer electrical conductivity than an oil-in-water emulsion containing dissolved ions.
  3. CA water-soluble dye colours only the dispersed droplets of a water-in-oil emulsion.
  4. DA water-in-oil emulsion can be diluted directly by adding water.

Answer: A, B, C

The continuous phase of a water-in-oil emulsion is oil, so it can be diluted with benzene (statement 1) and has poor conductivity (statement 2). A water-soluble dye colours only the water droplets (statement 3). Water cannot be mixed in directly because oil is the continuous phase, so statement 4 is wrong.
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