Q. Which of the following is the correct order of increasing enthalpy of vaporization?
A) NH_{3}<PH_{3}<AsH_{3}
B) AsH_{3}<PH_{3}<NH_{3}
C) PH_{3}<AsH_{3}<NH_{3}
D) NH_{3}<AsH_{3}<PH_{3}
Explanation
(c)
Order of increasing enthalpy of vaporisation is PH_{3}<AsH_{3}<NH_{3}
The enthalpy of NH_{3} is higher due to the H- bonding.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.