4L - Food Chem quiz

Before alkaline wastewater from wastewater treatment plants are discharged into the rivers and seas, it must be treated with ____________

• acids

• fertilisers

• microbes

• indicators

Antacids can be used to relief gastric pain because antacids is a _______

• base

• acid

• carbonate

• metal

The pH of 4 acids are measured. Which of the following is the most acidic?

• pH = 1

• pH = 3

• pH = 7

• ph = 14

Algae boom kills fishes by preventing the plants from producing _______

Which of the following does not involve chemical changes in food substances?

• burning of food

• cooking of food

• decaying of food

• packing of food in metal containers

Which of the following can be used to identify contaminants in food?

• chromatography

• distillation

• dissolving

• evaporation

Which of the following can be used to obtain salt from seawater?

• chromatography

• distillation

• dissolving

• evaporation

Which of the following can be used to obtain clean water from seawater?

• chromatography

• distillation

• dissolving

• evaporation

Which of the following can be used to separate sand from water?

• chromatography

• distillation

• filtration

• evaporation

which of the following cannot be used to measure the pH of acids?

• litmus paper

• universal indicator

• pH meter