Class XI

Electronic configuration 2,8,6 indicates that in order to gain stability, oxygen is short of
  1. One electron
  2. One pair of electron
  3. Three electrons
  4. Two pairs of electron
Copper Sulfate CuSO4 is produced when reaction occurs between warm Sulfuric Acid (H2SO4) and
  1. Copper(s) (Cu)
  2. Copper Hydroxide (Cu(OH)2)
  3. Copper Oxide (CuO)
  4. All of these
 Upon heating, conversion of solids into liquids can be explained through
  1. Physical energy
  2. Radiant energy
  3. Heat energy
  4. Kinetic energy
Organic solvents do not include
  1. Alcohol
  2. Water
  3. Petrol
  4. Tetra chloromethane
OH- ions are produced by
  1. Alkalis
  2. Acids
  3. Both alkalis and acids
  4. None of alkalis and acids
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