Home
Class 12
CHEMISTRY
The bond dissociation energy of B-F in B...

The bond dissociation energy of B-F in `BF_(3)` is 646 kJ `mol^(-1)` whereas that of C-F in `CF_(4)` is 515 kJ `mol^(-1)`. The correct reason for higher B-F bond dissociation energy as compared to that of C-F bond is

A

Smaller size of B atom as compared to that of C atom

B

Stronger `sigma` bond between B and F `BF_(3)` as Compared to that between C and F in `CF_(4)`

C

Lower degree of `ppi-ppi` interaction between B and F in `BF_(3)` than that between C and F I `CF_(4)`

D

Significant `ppi-ppi` interaction between B and F in `BF_(3)` whereas there is no possibility of such interaction between C and F in `CF_(4)`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Similar Questions

Explore conceptually related problems

The bond dissociation energy of B-F in BF_(3) is 646 kJ mol^(-1) whereas that of C-F in CF_(4) is 515 kJ mol^(-1) . The correct reason for higher B-F bond dissociation energy as compared to that of C-F in CF_(4) is

The correct increasing order of bond dissociation energy for N_2, O_2, F_2, Cl_2 is

Bond dissociation energy of F_(2) is less that of Cl_(2) give reason.

The dissociation energy of CH_(4)(g) is 360 kcal mol^(-1) and that of C_(2)H_(6)(g) is 620 kcal mol^(-1) . The C-C bond energy

The correct order of bond dissociation energies of various C-H bonds present in the compound is

The enthalpy of formation of UF(g) is 22kcal mol^(-1) and that of U(g) is 128kcal mol^(-1) . The bond energy of the F-F bond is 37kcal mol^(-1) . The bond dissociation energy of UF(g) is (are):

Assertion : Bond dissociation energy of B-F bond in BF_(3) molecule is lower than C-F bond in CF_(4) molecule. Reason : Atomic size of B-atom is larger than that of C-atom.

Assertion : Bond dissociation energy of B-F bond in BF_(3) molecule is lower than C-F bond in CF_(4) molecule. Reason : Atomic size of B-atom is larger than that of C-atom.

The average energy required to break a P-P bond in P_(4)(s) into gaseous atoms is 53.2 kcal mol^(-1) . The bond dissociation energy of H_(2)(g) is 104.2kcal mol^(-1) , Delta H_(f)^(0) of PH_(3)(g) from P_(4)(s) is 5.5 kcal mol^(-1) . The P-H bond energy in kcal mol^(-1) is [ Neglect presence of Van der Waals force in P_(4)(s) ]