Class XI

Crystallization, evaporation and distillation is a mean of
  1. Separating soluble substances in solution
  2. Separating insoluble substances in solutions
  3. Separating filtrate from solution
  4. All of these
To know, that electricity is flowing through circuit,
  1. Switches are used
  2. A bulb is attached
  3. It is held in middle fingers
  4. A micro chronometer shall be used
Insoluble Sulphates are
  1. CaSO4
  2. BaSO4
  3. CuSO4
  4. PbSO4
 Atoms bond in order to
  1. Attain a structure
  2. Attain a compound
  3. Attain a noble gas structure
  4. All of these
 Distinction between a weak acid or strong acid can be made through
  1. Litmus indicator
  2. Universal indicator
  3. Methyl orange indicator
  4. Phenolphthalein indicators
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