MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Inorganic Chemistryp-Block (group 13 and 14)Boron and Its Compounds
BCl₃ does not exist as a dimer but BH₃ exists as B₂H₆ because
A.Cl₂ is more electronegative than hydrogen
B.large size of chlorine atom does not fit between small✓ Correct
C.there is pp-dp back bonding in BCl₃
D.both (b) and (c)
Explanation
Boron trichloride 3 BCl does not exist as a dimer but boron trihydride 3 3 B H exists as 2 6 B H because the large size of chlorine atom does not fit between small- sized boron atoms, while small-sized hydrogen atoms occupy the space between boron atoms. And in the solution state boron in boron trihydride accepts lone pair of electrons from oxygen and nitrogen to get the stability.
Practice More Like This
Take chapter-wise tests, track your progress, and master p-Block (group 13 and 14).
Start Free Practice →