From the reactions: \( \mathrm{ZnO + Na_2O \rightarrow NaZnO} \) and \( \mathrm{ZnO + CO_2 \rightarrow ZnCO_3} \) it may be concluded that zinc oxide is

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

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 give...

Sodium hydroxide (NaOH) pellets are

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 = 2...

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 s...

Water is said to be 'hard' if it

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

Nitrogen can best be obtained from a mixture over oxygen and nitrogen by passing the mixture over