Question

Which statement describes a general property of bases?



They taste sour.



They turn blue litmus red.



They conduct an electric current in a solution.



The concentration of H+ is greater than concentration of OH- .

Answer 1

I'd go for electrical conduction. I can't remember which way round the litmus test goes. NaOH is a base/alkali and there's no H+. Acids tend to be sour or bitter - lemon juice. I've never knowingly tasted a base. I don't know whether cow's milk would qualify as a base. An alkali is a base which dissolves in water.
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Answer 2

this is a tricky area IMHO osprey

to my knowledge, bases include the metal oxides as well as liquid (soluble) alkalis

i have no idea what the answer is, but i do wonder if c) can be the right answer as non-alkali bases do not dissolve by definition.