Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

P Block Elements question

2010 · Q109
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Chemistry
  4. /P Block Elements
  5. /2010 · Q109

P Block Elements question

2010 · Q109

NEETChemistryP Block ElementsMCQ+4 / −1
The tendency of BF3, BCl3 and BBr3 to behave as Lewis acid decreases in the sequence
  1. A
    BCl3 > BF3 > BBr3
  2. B
    BBr3 > BCl3 > BF3
  3. C
    BBr3 > BF3 > BCl3
  4. D
    BF3 > BCl3 > BBr3
View written solutionFree

Correct answer: B

In BF3, p-p overlap between B and F is maximum due to identical size and energy of p-orbitals, so electron deficiency in boron of BF3 is neutralized partially to the maximum extent by back donation. Also, the tendency to back donate decreases from F to I. So the order will be:

BBr3 > BCl3 > BF3

PreviousNext

More from P Block Elements

  • Oxidation states of P in H4P2O5, H4P2O6, H4P2O7 are respectively2010 · MCQ
  • The correct order of increasing bond angles in the following species is2010 · MCQ
  • The stability of +1 oxidation state among Al, Ga, In and Tl increases in the sequence2009 · MCQ
  • The straight chain polymer is formed by2009 · MCQ
  • Among the following which is the strongest oxidising agent?2009 · MCQ
  • The angular shape of ozone molecule (O3) consists of2008 · MCQ
  • Which of the following anions is present in the chain structure of silicates?2007 · MCQ
  • Which one of the following orders correctly represents the increasing acid strengths of the given acids?2007 · MCQ