JEE Main 7 Jan 2020 Shift 1 Solved Paper

Section: Chemistry

Question : 34 of 75

Marks: +1, -0

In comparison to the zeolite process for the removal of permanent hardness, the synthetic resins method is :

[7-Jan-2020 Shift 1]

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2NaZ+M2+(aq)	→	MZ2(s)+2Na+(aq)
‌	‌	(M→Mg,Ca)

2RNa(s)+M2+(aq)	→	R2M(s)+2Na+(aq)
(Cation‌exchange‌resin)	‌	(M→Mg,Ca)

RNH3+OH−(s)+X−(aq)	→	RNH3+X−(s)+OH−(aq)
(Anion‌exchange‌resin)	‌	(X−=Cl−,HCO3−,SO42−‌etc)