Neco Chemistry Past Questions and Answers

Question 56:

• NECO 2003

What is formed when starch is completely hydrolysed?

A. Fructose
B. Glucose
C. Lactose
D. Maltose
E. Sucrose

Question 57:

• NECO 2003

Which hydrocarbon does NOT exhibit structural isomerism?

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

Question 58:

• 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 59:

• NECO 2003

Which metal is extracted from bauxite?

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

Question 60:

• NECO 2003

Which separation technique is routinely applied in the petroleum industry?

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