Applied Chemistry Lab Quiz 2

The water after removing of sludge in the biological oxidation process is treated with

____________

• Chlorine

• Bromine

• Fluorine

• Iodine

Which of the following best describes the goal of applied chemistry?

• To learn about the principles of chemistry

• To solve real-world problems

• To advance common science knowledge

• To create computer applications

During a chemical reaction, the sum of the masses of the reactants and products remains unchanged .This is known as the :

• Law of molar masses

• Law of Conservation of Mass

• Law of definite proportions.

• Law of indefinite proportions.

Which one of the following metals do not form amalgams?

• Zinc

• Copper

• Magnesium

• Iron

All impurities are oxidised into the _________ and ___________ in the biological oxidation process

• Oxygen and water

• Carbondioxide and water

• Nitrogen and water

• Chlorine and water

Which one of the

following is also called as Stranger Gas?

• Argon

• Neon

• Xenon

• Nitrous oxide

Which one among the following is called "philosopher's" wool?

• Zinc bromide

• Zinc nitrate

• Zinc oxide

• Zinc chloride

Which of the following is not an example of a weak acid?

• Lactic acid

• Carbonic acid

• Sulfuric acid

• Pyruvic acid

Which of the following methods is suitable for preventing an iron frying pan from Rusting

?

• Applying paint

• Applying grease

• Applying a coating of zinc.

• All of the above.

In the trickling filter process, the _________ build up and they block the passage

• Sludge formed

• Dissolved impurities

• Dissolved solids

• Micro organisms