Verified Solution • 2025–26 Session moderate

QJEEM21Chce57: JEE Main 2021 Chemistry - Class 12 JEEM21Chce57 Solution: To an aqueous solution containing ions such as Al 3+ , Zn 2+ ,…

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 :

Multiple Choice Options

  • A 1
  • B 3
  • C 4
  • D 2

Step-by-Step Verified Solution

Al3+ and Fe3+ sulphides hydrolyse in water.

Ni2+ and Zn2+ require basic medium with H2S to form ppt

Ca2+ and Ba2+ sulphides are soluble

hence, we will receive only CuS ppt.

Related Learning Resources & Exam Preparation

JEE Main PYQ Question Bank
Browse year-wise authentic previous years' questions with solutions
Authentic CBT Mock Tests
Simulate official exam environment with live timer and percentile scoring