Class IX

What do you get when you mix an acid and a base?
  1. an amino acid
  2. a soap
  3. a salt
  4. a sugar
Potassium chloride contains K -
  1. 18%
  2. 48%
  3. 44%
  4. 60%
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
A vector describes:
  1. direction only
  2. magnitude only
  3. size and shape
  4. magnitude and direction
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