Class IX

The reaction which converts sugar solution into alcohol is an example of
  1. saponification
  2. hydrogenation
  3. fermentation
  4. hydrolysis
Which gas is released from paddy fields?
  1. CO2
  2. H2S
  3. CH4
  4. NH3
Measurable or numerical information is called:
  1. qualitative data
  2. quantitative data
  3. a variable
  4. a hypothesis
Which of these elements is a noble gas?
  1. krypton
  2. oxygen
  3. hydrogen
  4. hydrogen
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.
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