JAMB Past Questions and Answers - Page 1521

At S. T. P how many litres of hydrogen can be obtained from the reaction of 500 cm³ of 0.5 M H ₂SO ₄ with excess zinc metal?
(Gram molecular volume of H₂ = 22. 4 dm ³)

An aqueous solution of a metal salt, M, gives a white precipitate with NaOH which dissolves in excess NaOH. With aqueous ammonia, the solution of M also gives a white precipitate which dissolves in excess ammonia. Therefore cartion in M is

Which of the following electrodes is used in electrolysis of bauxite (Al2O3) in molten cryolite?

A piece of sea shell, when dropped into a dilute solution of hydrochloric acid, produces a colourless, odourless gas which turns clear limewater milky. The sea shell contains

The function of conc. H₂SO₄ in the esterification of ethanoic acid with ethanol is to