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

Option 1 - It is also known as Graham’s salt.

Option 2 - It is polymeric compound and is water soluble.

Option 3 - It doesn’t remove Ca2+ ion by precipitation.

Option 4 - Calgon contains the 2nd most abundant element by weight in the Earth’s crust.

3 Views|Posted 4 months ago

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Alok Kumar Singh | Contributor-Level 10

4 months ago

Correct Option - 1

Detailed Solution:

It does not contains 2^nd most abundant element by weight in earth crust because that is Si Calgon -> Na₂ [Na₄ (PO₃)₆]

$\to_{}^{W a t e r s o l u b l e} 2 N a^{+} {[N a_{4} {(P O_{3})}_{6}]}^{2 -}$

$\to_{}^{C a^{2 +}} 2 N a^{+} {[N a_{2} C a {(P O_{3})}_{6}]}^{2 -}$

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Chemistry Ncert Solutions Class 11th 2023

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