JEE Main 2020ChemistryIonic EquilibriumMediumMCQ

JEE Main 2020 — Ionic Equilibrium Question with Solution

JEE Main 2020 (08 Jan Shift 2)

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.

Choose an option

Show full solutionCorrect option: B
Correct answer
BBoth assertion and reason are false.

Step-by-step explanation

H2O(l)⇌H(aq)++OH(aq)−

For ionization of H 2 O:ΔH>O ⇒  Endothermic on temperature increase reaction shifts forward

⇒ both H + and H - increase

⇒ pH & pOH decreases.

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About this question

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.