Lithium, sodium, and potassium are Group 1 alkali metals.
Which statement correctly describes what is observed when each of these three metals is added to cold water?
They all sink to the bottom, react slowly, and form an acidic solution.
They all float on the surface, fizz as hydrogen gas is produced, and form an alkaline solution.
Some float and some sink, they release oxygen gas, and form a neutral solution.
They all float on the surface, catch fire immediately with a lilac flame, and form an acidic solution.
41 exam-style questions on OCR GCSE Chemistry Predicting chemical reactions. Each one has a worked solution and a mark scheme showing where the marks go.