Verified Solution • 2025–26 Session moderate

QJEEM21Ch23d8: JEE Main 2021 Chemistry - Class 12 JEEM21Ch23d8 Solution: Calgon is used for water treatment. Which of the following…

Calgon is used for water treatment. Which of the following statement is NOT true about Calgon?

Multiple Choice Options

  • A It is also known as Graham's salt.
  • B It is polymeric compound and is water soluble.
  • C It does not remove Ca2+ ion by precipitation.
  • D Calgon contains the 2nd most abundant element by weight in the Earth's crust.

Step-by-Step Verified Solution

Calgon is sodium hexametaphosphate, a polymeric compound also called as Graham’s salt.

Order of abundance of element in earth crust is

O > Si > Al > Fe > Ca > Na > Mg > K

So second most abundant element in earth crust is Si not Ca.

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