QAIPMT-2005-Ch-2476: NEET 2006 Physics - Class 12 AIPMT-2005-Ch-2476 Solution: What is the correct relationship between the pH of isomolar…

What is the correct relationship between the pH of isomolar solutions of sodium oxide $Na_2O$ (pH1) sodium sulphide $Na_2S$ (pH2) sodium selenide $Na_2Se$ (pH3) and sodium telluride $Na_2Te$ (pH4)? pH1 > pH2 > pH3 > pH4 pH1 > pH2 $\approx$ pH3 > pH4 pH1 < pH2 < pH3 < pH4 pH1 < pH2 < pH3 $\approx$ pH4