Multiple choice

Which of the following statement is incorrect ?

  1. N-F bond length in NF3 is shorter than B-F bond length in BF3 .

  2. B-F bond length in BF3 is shorter than than B-F bond length in BF3 -NH3 .

  3. PH3 is weaker base than that of NH3 .

  4. In S2O3-2 both the sulphur atom has different oxidation state .
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

 this option is correct because , in BF3 boron has empty 'p' orbital in which non bonded electrons of Fluorine accommodate and form pπ - pπ back bond . due to which bond length decreases . hence  this statement  is incorrect . and  this  option is correct  . 

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