Class XI

Amphoteric oxides
  1. Are only acidic oxides
  2. Are only basic oxides
  3. Are both acidic and basic oxides
  4. Are a form of neutral oxides
 Solvent refers to the
  1. Gas that will dissolve
  2. A solid which dissolves
  3. A liquid which does dissolving
  4. A liquid that is dissolved
Selective charges occurs for the
  1. Ions which require least energy to be discharged
  2. Ions which require most energy to be discharged
  3. Elements of group VII
  4. Metal chlorides
Number of electrons in calcium are 20. outermost shall will have as many as
  1. No electrons
  2. 1 electron
  3. 2 electrons
  4. More than 2 electrons
Main elements of living things do not include
  1. Nitrogen
  2. Phosphorus
  3. Sodium
  4. Calcium
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