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JEE Main 2009
Exam
JEE Main
Year
2009
Subject
Chemistry
Chapter
Classification of Elements and Periodicity in Properties

JEE Main 2009 · Chemistry · Classification of Elements and Periodicity in Properties

In which of the following arrangements, the sequence is not...

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

Options

  1. ACO2<SiO2<SnO2<PbO2\mathrm{CO}_2 < \mathrm{SiO}_2 < \mathrm{SnO}_2 < \mathrm{PbO}_2 : increasing oxidising power
  2. BHF<HCl<HBr<HI\mathrm{HF} < \mathrm{HCl} < \mathrm{HBr} < \mathrm{HI} : increasing acid strength
  3. CNH3<PH3<AsH3<SbH3\mathrm{NH}_3 < \mathrm{PH}_3 < \mathrm{AsH}_3 < \mathrm{SbH}_3 : increasing basic strength
  4. DB<C<O<N\mathrm{B} < \mathrm{C} < \mathrm{O} < \mathrm{N} : increasing first ionization enthalpy.

Correct answer

C. NH3<PH3<AsH3<SbH3\mathrm{NH}_3 < \mathrm{PH}_3 < \mathrm{AsH}_3 < \mathrm{SbH}_3 : increasing basic strength

Step-by-step solution

Correct basic strength is NH3>PH3>AsH3>BiH3\mathrm{NH}_3>\mathrm{PH}_3>\mathrm{AsH}_3>\mathrm{BiH}_3
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