Class XI

Exothermic compounds are
  1. Highly volatile
  2. Rarely stable
  3. Very stable
  4. Can be decomposed into their elements
Non-metals in group VII are likely to form
  1. Ionic bonds
  2. Covalent bonds
  3. Metallic bonds
  4. Dative bond
Mass of a proton is equal to that of mass of
  1. A neutron
  2. An electron
  3. A proton
  4. A positron
Sublimation refers to
  1. Conversion of solid directly into gas
  2. Conversion of gas into liquid
  3. Conversion of gas directly into solid
  4. Conversion of liquid into solid
Chemical formula for Caustic Potash is
  1. NaOH
  2. KOH
  3. MgO
  4. Ca(OH)2
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