ChemistryQ1–1 of 1 questions
Page 1 of 1 · English
1
ChemistryMediumMCQAIPMT · 1987
Of the following hydrides,which has the lowest boiling point?
A
$NH_3$
B
$PH_3$
C
$SbH_3$
D
$AsH_3$
Solution
(B) The boiling point of hydrides of group $15$ elements generally increases down the group due to an increase in molecular mass and van der Waals forces.
However,$NH_3$ has an anomalously high boiling point due to intermolecular hydrogen bonding.
Among the remaining hydrides ($PH_3$,$AsH_3$,$SbH_3$),$PH_3$ has the lowest molecular mass and thus the weakest van der Waals forces.
Therefore,$PH_3$ has the lowest boiling point.
However,$NH_3$ has an anomalously high boiling point due to intermolecular hydrogen bonding.
Among the remaining hydrides ($PH_3$,$AsH_3$,$SbH_3$),$PH_3$ has the lowest molecular mass and thus the weakest van der Waals forces.
Therefore,$PH_3$ has the lowest boiling point.
0 likesView Solution
Vedclass Products
For Students
Vedclass Test Series
Mock tests in real AIPMT style covering Chemistry with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D Chemistry papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Run live AIPMT mock exams with unlimited students, 360° analytics & white-label branding.
See DemoFrequently Asked Questions
How many Chemistry questions are in AIPMT 1987?
There are 1 Chemistry questions from the AIPMT 1987 paper on Vedclass, each with a detailed step-by-step solution in English.
Are AIPMT 1987 Chemistry solutions available in English?
Yes. All solutions on this page are in English. You can also switch to English or Hindi using the language buttons above the questions.
Can I practice AIPMT 1987 Chemistry as a timed test?
Yes. Use the Vedclass Test Series to attempt a full AIPMT mock test covering Chemistry with time limits and instant score analysis.
Can teachers create Chemistry papers from AIPMT previous year questions?
Yes. The Vedclass Exam Paper Generator lets teachers mix AIPMT Chemistry questions and generate Set A/B/C/D papers in minutes.
For Teachers & Institutes
Build a Custom Chemistry Paper
Pick AIPMT 1987 Chemistry questions, set difficulty, and generate Set A/B/C/D in 2 minutes.