JEE Main 2021ChemistryPractical ChemistryMediumMCQ

JEE Main 2021 — Practical Chemistry Question with Solution

JEE Main 2021 (27 Jul Shift 2)

Question

To an aqueous solution containing ions such as Al3+,Zn2+,Ca2+,Fe3+,Ni2+,Ba2+ and Cu2+ was added conc. HCl, followed by H2S. The total number of cations precipitated during this reaction is/are :

Choose an option

Show full solutionCorrect option: A
Correct answer
A1

Step-by-step explanation

Al3+ and Fe3+ sulphides hydrolyse in water. Ni2+ and Zn2+ require basic medium with H2 S to form precipitate.  Ca2+ and Ba2+ sulphides are also soluble.  only Cu2+ can form the precipitate with H2S in the acidic medium.

Practice this on the real CBT interface

Solve this JEE Main question (and the rest of the Practical Chemistry chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.

Solve interactively →

About this question

This is a previous-year question from JEE Main 2021, covering the Practical Chemistry 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.