Class XI

bond lengths are lower in elements having
  1. crystal structure
  2. double bond
  3. single bond
  4. triple bond
The bond formed, as a result of the electrostatic attraction between the positive and negative ions was termed as
  1. single covalency
  2. electrovalent bond
  3. coordinate bond
  4. covalent bond
When a gas phase atom in its ground state gains an electron. This is called
  1. ionization enthalpy
  2. Electron affinity
  3. electron gain enthalpy
  4. lattice enthalpy
The number of dots around the Lewis symbols for the elements represent
  1. the number of valence electrons of the element
  2. coordinate valency
  3. electrovalency
  4. group valence of the element
Octet of electrons, represents a particularly stable electronic arrangement.. Atoms achieve the stable octet when they are linked by chemical bonds. This rule is associated with one of the following theories
  1. Lewis approach
  2. Valence Shell Electron Pair Repulsion VSEPR Theory
  3. Molecular Orbital (MO) Theory
  4. Valence Bond (VB) Theory
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