Post Utme Chemistry Past Questions and Answers

Question 766:

The decarboxylation of ethanoic acid will produce carbon (iv) and ____________

A. Propane
B. Butane
C. Methane
D. Ethane

Question 767:

An example of oxidation reduction enzyme is ____________

A. Amylase
B. Protease
C. Lipase
D. Dehydrogenase

Question 768:

The saponification of an alkanoate to produce soap and alkanol involves ____________

A. Dehydration
B. Esterification
C. Hydrolysis
D. Oxidation

Question 769:

An isotope has atomic number of 15 and a mass number of 31,
The number of proteins it contain is ____________

A. 31
B. 15
C. 16
D. 46

Question 770:

The hardness of water is mainly due to the presence of ____________

A. Calcium chloride or sodium chloride
B. Calcium hydroxide or magnesium hydroxide
C. Calcium trioxocarbonate (iv) or calcium tetraoxosulphate (v)
D. Sodium hydroxide of magnesium hydroxide