Class IX

The reaction which converts sugar solution into alcohol is an example of
  1. saponification
  2. hydrogenation
  3. fermentation
  4. hydrolysis
Which of the following is an example of a malleable element?
  1. helium
  2. gold
  3. sulfur
  4. bromine
Which gas is released from paddy fields?
  1. CO2
  2. H2S
  3. CH4
  4. NH3
What is true of a balanced chemical equation?
  1. There are always more products than reactants.
  2. The number of moles of products equals the number of moles of reactants.
  3. Both sides of the reaction have the same number and types of atoms.
  4. Energy is always released.
Measurable or numerical information is called:
  1. qualitative data
  2. quantitative data
  3. a variable
  4. a hypothesis
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