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Classification of Elements and Periodicity in Properties
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26/08/2021 10:36 am
Topic starter
In which of the following arrangements, the sequence is not strictly according to the property written against it?
(a) CO2 < SiO2 < SnO2 < PbO2: increasing oxidising power
(b) NH3< PH3 < AsH3 < SbH3 : increasing basic strength
(c) HF < HCl < HBr < HI: increasing acid strength
(d) B < C < O < N: increasing first ionisation enthalpy
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26/08/2021 10:41 am
Correct answer: (b) NH3< PH3 < AsH3 < SbH3 : increasing basic strength
Explanation:
Correct order of increasing basic strength is NH3< PH3 < AsH3 < SbH3