JEE Main 2020 — Ionic Equilibrium Question with Solution
From: JEE Main 2020 (Online) 8th January Evening Slot
Question
For the following Assertion and Reason, the
correct option is :
Assertion : The pH of water increases with increase in temperature.
Reason : The dissociation of water into H+ and OH– is an exothermic reaction.
Assertion : The pH of water increases with increase in temperature.
Reason : The dissociation of water into H+ and OH– is an exothermic reaction.
Choose an option
Show full solutionCorrect option: A
Correct answer
ABoth assertion and reason are false.
Step-by-step explanation
H2O ⇌ H+
+ OH-
As H 0 for this reaction. So Dissociation of H2O is endothermic.
pH =
kw =
When temperature increases then
, as reaction is endothermic.
kT2 kT1
[pH]T2 [pH]T1
As H 0 for this reaction. So Dissociation of H2O is endothermic.
pH =
kw =
When temperature increases then
, as reaction is endothermic.
kT2 kT1
[pH]T2 [pH]T1
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This is a previous-year question from JEE Main 2020, covering the Ionic Equilibrium chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.