Class XI

Stable outer octet of electrons is achieved in chlorine atom during the formation of NaCl by:
  1. The formation of a hybrid orbital
  2. The gain of an electron
  3. The formation of a coordinate bond
  4. The loss of an electron
The amount of energy required to break one mole of bonds of a particular type between two atoms in a gaseous state is called
  1. bond enthalpy
  2. lattice enthalpy
  3. ionization enthalpy
  4. Electron affinity
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
bond lengths are lower in elements having
  1. crystal structure
  2. double bond
  3. single bond
  4. triple bond
Bond angle helps us in
  1. determining molecular size
  2. determining molecular shape
  3. determining the reactivity of the element
  4. determining the stability of the element
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