Verified Solution • 2025–26 Session moderate

QJEEM20Ch1ce6: JEE Main 2020 Chemistry - Class 11 JEEM20Ch1ce6 Solution: The one that is NOT suitable for the removal of permanent…

The one that is NOT suitable for the removal of permanent hardness of water is :

Multiple Choice Options

  • A Ion-exchange method
  • B Calgon's method
  • C Treatment with sodium carbonate
  • D Clark's method

Step-by-Step Verified Solution

For Removal of Temporary hardness two methods are present
(1) Clark’s method
(2) Boiling

While permanent hardness of water can be removed 4 methods
(1) Washong soda method (Na2CO3 method),
(2) Calgon method
(3) Permutit Process
(4) Ion-exchange Resin method.

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