Example based on : Arrhenius Concept
Ex.The characteristics of an acid is :
A) turns blue litmus to red. B) turns phenolphthalein pink from colourless.
C) decompose carbonates D) oxy compounds of non-metals
Sol. A), Statement A) indicates characteristic of acid.
Ex.Arrhenius theory of acid-base is not applicable in :
A) aqueous solution B) in presence of water C) non-aqueous solutions D) none of the above
Sol. C), since Arrhenius theory is only applicable to aqueous medium.
Ex.Select the suitable reason (s) for higher strength of an acid or base :
A) higher value of Ka or Kb B) higher extent of ionisation
C) A) and B) both D) Larger number of replaceable H atoms.
Sol. C), Ka or kb and degree of ionisation are the measure of strength of an acid or base.
Ex.The basicity of phosphorous acid is :
A) 1 B) 2 C) 3 D) 4
Sol. B), Phosphorous acid has two replaceable H+ ions.