CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Which of the following represent correct order?

A
Polarity of MH bond: PH3<AsH3<SbH3<NH3
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
Bond angle: NH3>AsH3>SbH3>BiH3
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
Bond angle: NO+2>NO2>NO2
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
Stability: H2>H+2=H2
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

The correct options are
A Polarity of MH bond: PH3<AsH3<SbH3<NH3
B Stability: H2>H+2=H2
C Bond angle: NH3>AsH3>SbH3>BiH3
D Bond angle: NO+2>NO2>NO2
All the four statements are correct statements.
(A) The increasing order of polarity is:
PH3(0)<AsH3(0.1)<SbH3(0.28)<NH3(0.9)
This is because lone pair and bond pair polarities almost cancel each other in case of phosphorus, while the bond pair start dominating in Sb and Bi. In nitrogen, lone pair and bond pair support the polarity in the same direction, hence, giving maximum polarity.
(B) The correct order of bond angles NH3>AsH3>SbH3>BiH3
On moving down the group, the electonegativity decreases and the bond angle decreases.
(C) The decreasing order of bond angle is NO+2>NO2>NO2.
NO+2 molecule is linear like CO2 molecule with bond angle of 180o. NO2 is angular with bond angle of 134o. In NO2, the bond angle is lower than 134o (i.e.115o) due to repulsion between lone pair and bond pair of electrons.
(D) The correct order of stability is H2>H+2=H2
H2 has bond order of 1. H+2 and H2 have bond orders of 0.5 each. Higher the bond order, higher is the stability.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
VSEPR Theory and Dipole Moment
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon