Chemistry 2003 Neco Past Questions and Answers

Question 16 :

• NECO 2003

Which hydrocarbon does NOT exhibit structural isomerism?

A. C₃H₆
B. C₄H₆
C. C₄H₈
D. C₄H₁₀
E. C₅H₁₂

Question 17 :

• NECO 2003

Why is tetraoxosulphate(VI) acid NOT used for making carbon dioxide from calcium carbonate? It is ____________

A. A dehydrating agent
B. A strong acid
C. An oxidising agent
D. Dibasic
E. Forms insoluble calcium tetraoxosulphate(Vl)

Question 18 :

• NECO 2003

Which metal is extracted from bauxite?

A. Aluminium
B. Calcium
C. Copper
D. Magnesium
E. Tin

Question 19 :

• NECO 2003

Which separation technique is routinely applied in the petroleum industry?

A. Chromatography
B. Distillation
C. Evaporation
D. Fractional crystallization
E. Fractional distillation

Question 20 :

• NECO 2003

Small amounts of compounds of transition metals are sometimes added to glass during manufacture in order to make the glass

A. Acquire certain colours
B. Easier to melt
C. Easier to mould
D. Little brittle
E. More transparent