Integrated Science

Question 1

1Kenkey production involves fermenting maize dough mainly by

Hard

A. viruses B. lactic acid bacteria and yeast C. heat only D. salt only

Question 2

2Making soap from fat or oil and an alkali is called

Easy

A. fermentation B. distillation C. neutralisation only D. saponification

Question 3

3Local "alata samina" (black soap) gets its alkali from

Easy

A. sugar B. vinegar C. table salt D. ash from burnt plant materials such as cocoa pods and plantain peels

Question 4

4In processing cassava into gari, the grated cassava is fermented and pressed mainly to

Medium

A. add colour B. add vitamins C. remove water and reduce the poisonous cyanide content D. increase the starch

Question 5

5Soft soap is usually made with

Medium

A. sulphuric acid B. sodium chloride C. calcium carbonate D. potassium hydroxide

Question 6

6In soap making, the by-product glycerol comes from

Hard

A. the fat or oil B. water C. the alkali D. salt

Question 7

7Palm wine becomes sour over time because

Medium

A. it freezes B. sugar increases C. water evaporates D. ethanol is oxidised to ethanoic acid

Question 8

8Soap is made by boiling oil or fat with

Easy

A. salt only B. sugar C. an alkali such as potash or caustic soda D. vinegar

Question 9

9Shea butter is extracted from the nuts of the shea tree mainly in

Easy

A. the Volta lake B. northern Ghana C. the coastal savanna D. the rainforest belt

Question 10

10The local process of making gari involves

Easy

A. smoking fish B. drying cocoa C. boiling maize D. grating, fermenting, pressing and roasting cassava