Acid and Alkali is obviously more well known but the saying goes ‘all alkali are bases but not all bases are alkali’
It’s acids and bases.
Alkalis are just bases that dissolve in water
Acids and bases is correct.
Alkalis are just soluble bases (ie they dissolve in water). So a substance over pH 7 is a base but not necessarily an Alkali…
It’s only an alkali if it’s a base (because it’s over pH 7) AND it’s soluble.
So for alkali to be correct, the question would have to ask what a soluble substance over pH of 7 is.
It's not even Russian, it comes from Spanish