Class X

Which of the following can be used for the denaturation of ethyl alcohol?
  1. Methyl alcohol
  2. Pyridines
  3. Copper sulphate
  4. All of above
The isomeric pair is
  1. ethane and propane
  2. propane and butane
  3. ethane and ethane
  4. butane and 2-methyl propane
The substnace not responsible for the hardness of water is
  1. Sodium nitrate
  2. calcium hydrogen carbonate
  3. calcium carbonate
  4. magnesium carbonate
The by product of soap is
  1. isoprene
  2. glycerol
  3. butene
  4. ethylene glycol
Tertiary butane gets oxidised with oxidising agents like alkaline KMNO4 to
  1. Isobutane
  2. Ter-butyl alcohol
  3. Seconadary-propyl alcohol
  4. All of above
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