Class X

Which of the following is an odd compound?
  1. Ethene
  2. Ethane
  3. Propene
  4. Acetylene
Vinegar is a solution of
  1. 30% � 40% acetic acid in alcohol
  2. 5% � 8% acetic acid in alcohol
  3. 5% � 8% acetic acid in water
  4. 15% � 20% acetic acid in water
prepared urea the first time by heating ammonium cynate?
  1. Wöhler
  2. Lavosier
  3. Fuller
  4. Habër
Soaps are formed by saponification of
  1. alcohols
  2. glycosides
  3. simple esters
  4. carboxylic acids
Which of the following is not an aliphatic hydrocarbon?
  1. ethene
  2. ethane
  3. ethane
  4. benzene
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