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JEE Main2012ChemistryClassification of Elements and Periodicity in PropertiesActual

In which of the following arrangements, the sequence is not strictly according to the property written against it?

Options

  1. ACO ₂ < SiO ₂ < SnO ₂ < PbO ₂ : increasing oxidising power
  2. BNH ₃ < PH ₃ < AsH ₃ < SbH ₃ : increasing basic strength
  3. CHF < HCl < HBr < HI : increasing acid strength
  4. DB < C < O < N : increasing first ionisation enthalpy.

Correct answer

B. NH ₃ < PH ₃ < AsH ₃ < SbH ₃ : increasing basic strength

Step-by-step solution

Correct order of increasing basic strength is NH ₃> PH ₃> AsH ₃> SbH ₃> BiH ₃

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