Assertion :Bond angle of ${P F}_{3} > P {C l}_{3}$ but bond angle of $P {C l}_{3} < P {B r}_{3}$ Reason: The bond angles show an increase on decreasing electronegativity of attached other atom on central atom but in ${P F}_{3}$ $p π - d π$ bonding results in an increase in bond angle.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Assertion is correct but Reason is incorrect

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Assertion is incorrect but Reason is correct

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
There are two types of electron repulsions that shape these molecules:
1. lone pair-bond pair which decreases the angle
2. bond pair-bond pair which increases the angle
The lone pair-bond pair repulsion increases slowly with the decrease in electronegativity of the bonded element so fluorine will have large bond angle due to lp-bp repulsion.
But the bond pair-bond pair repulsion increases by the increase in size of the bounded element (bigger atom means bigger electron density around it). The bond pair-bond pair repulsion increases more than the lone pair-bond pair repulsion when going down a group. so due to bp-bp the bromine bond angle will be more than chlorine.

Suggest Corrections

Similar questions

Q. Assertion : In the bonding molecular orbital (MO) of

H_{2}

, the electron density is increased between the nuclei.
Reason : The bonding MO is

ψ_{A} + ψ_{B}

, which shows destructive interference of the combining electron waves.

Assertion (A) Bond angle in ethers is slightly less than the tetrahedral angle.
Reason (R) There is a repulsion between the two bulky (- R) groups.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

Q. Read the assertion and reason carefully to mark the correct option out of the options given below:
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.
(c) If assertion is true but reason is false.
(d) If assertion and reason both are false.

Assertion : HOF bond angle is greater than HOCl bond angle.
Reason : Oxygen is more electronegative than halogens

Assertion (A) Boiling points of alcohols and ethers are high.
Reason (R) They can form intermolecular hydrogen-bonding.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

Q. Assertion : Two electrons of helium atom are placed in only one shell but three electrons of lithium need two shells.
Reason: A shell can have maximum

{2n}^{2}

electrons.

Join BYJU'S Learning Program

Assertion :Bond angle of PF3>PCl3 but bond angle of PCl3<PBr3 Reason: The bond angles show an increase on decreasing electronegativity of attached other atom on central atom but in PF3 pπ−dπ bonding results in an increase in bond angle.

Assertion :Bond angle of ${P F}_{3} > P {C l}_{3}$ but bond angle of $P {C l}_{3} < P {B r}_{3}$ Reason: The bond angles show an increase on decreasing electronegativity of attached other atom on central atom but in ${P F}_{3}$ $p π - d π$ bonding results in an increase in bond angle.