What volume of hydrogen will be produced if 100cm3 of ammonia is completely decomposed at constant temperature and pressure? The equation for reaction is 2NH3(g) → N2(g) + 3H2(g)

If a metal R forms a compound with the formula R(NO3)2 , the formula of its tetraoxosulphate (IV) is

Which of the following substances increases in mass when heated in air?

A substance is said to be hygroscopic if it absorbs

Which of following acids forms normal salts only?

The gas given off when NH4 Cl is heated with an alkali is

Equal amounts of marble chips are reacted separately with 100cm3 of hydrochloric acid of different concentrations. If all the marble chips reacted; which of the following remained the same in each case?

What will happen if more heat is applied to the following system at equilibrium? X2(g) + 3Y 2(g) ⇌ 2XY3(g); ∆H = xKJmol-1

Calculate the mass of sodium hydroxide in 5.00 dm3 of a 0.125 mol dm-3 solution. [NaOH = 40 g mol-1]

A visible change is observed when a strip of iron is placed in an aqueous solution of

Which of the following compounds will leave a metal residue when heated?

CuSO45H2O can be obtained from an aqueous solution of copper (ll) tetraoxosulphate (VI) by

2001 WAEC SSCE Chemistry Past Questions