Answer:
(a)
Water soluble bases are called alkalies, e.g., NaOH, KOH. Thus, all alkalies
are bases but all bases are not alkali. (1)
(b) Substances which gives off ions in solution show
acidic properties.
Out of the substances given, sugar, alcohol and urea do
not produce ions in solutions. Hence they will
not show acidic properties. (2)
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