A pair of strong alkali is:
LiOH and Sr(OH)2.
NaOH and Ca(OH)2.
NaOH and KOH.
Ca(OH)2 and Mg(OH)2.
Amphoteric hydroxides react with both alkalies and acids. Which of the following Group 2 metal hydroxides is soluble in sodium hydroxide?
Ba(OH)2.
Ca(OH)2.
Mg(OH)2.
Be(OH)2.