July 2022 1 3 Report
Укажите вещества, с помощью которых можно определить формальдегид в растворе *
1.аммиачные раствор серебра
2.Меди (II) гидроксид
3.Железа (II) хлорид
4.калий гидроксид

я знаю что может номер 2,но может ещё какой-то?
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