Waec Chemistry 1996 Past Questions and Answers

Question 31:

• WAEC 1996

Nitrogen is prepared on a large scale by the

A. Fractional distillation of liquefied air
B. Decomposition of ammonium dioxonitrate (lll)
C. Electrolysis of brine
D. Haber process
E. Contact process

Question 32:

• WAEC 1996

Ammonia gas is suitable for performing the 'Fountain' experiment because the gas is

A. Colourless
B. A cooling agent
C. Alkaline to litmus
D. A reducing agent
E. Very soluble in water

Question 33:

• WAEC 1996

Which of the following metals will be the most suitable for use where lightness and resistance to corrosion are of importance?

A. Lead
B. Copper
C. Iron
D. Calcium
E. Aluminium

Question 34:

• WAEC 1996

What amount of copper is deposited when 13.0g of zinc reacts with excess copper (ll) tetraoxosulphate (IV) solution according to the following equation? Zn _(s) + CuSO_4(aq) → ZnSO_4(aq) + Cu _(s) [Cu =63,5, Zn = 65]

A. 0.1 mole
B. 0.2mole
C. 0.3 mole
D. 0.4 mole
E. 0.5 mole

Question 35:

• WAEC 1996

The products formed when sodium hydrogen trioxocarbonate (IV) is heated strongly are

A. Carbon (IV) oxide and sodium hydride
B. Carbon (IV) oxide and soudium trioxocarbonate (IV)
C. Sodium trioxocarbonate (IV) and steam
D. Carbon (IV) oxide and steam
E. Sodium trioxocarbonate (IV) carbon (IV) oxide and steam