MEDIUMMCQ SINGLEJEE Mains ChemistryPhysical ChemistryIonic equilibriumPrevious Year Questions

Buffer solutions have constant acidity and alkalinity because (AIPMT 2012)

A.these give unionised acid or base on reaction with

B.acids and alkalies in these solutions are shielded

C.they have large excess of H+ or OH- ions✓ Correct

D.they have fixed value of pH.

Explanation

Buffer solutions have unionised acid or base which on reaction with added acid or alkali keep acidity and alkalinity constant. 26. Which is the strongest acid in the following? (NEET 2013) (a) 2 4 H SO (b) 3 HClO (c) 4 HClO (d) 2 3 H SO We know that, for the acidic strength of oxy acids. 1. Consider the oxidation states of central metal ion. Higher the oxidation number, higher will be its acidic strength. 2. If the two have same oxidation states, then go for the number of oxygens attached to it. More the number of oxygens attached, higher will be its acid

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