Acid, Base and Alakali

In a neutralisation reaction, what is the function of the indicator?

• To indicate that the mixture is neutral
• To indicate that hot water should be added
• To indicate that the flask should be shaken
• To indicate that a precipitate is formed

What colour is Universal indicator when the solution is neutral?

• Red

• Green

• Blue

• Purple

What is neutralisation?

• This is a reaction between an acid and water to form salt and base.

• This is a reaction between an acid and base to form salt and water.

• This is a reaction between a base and salt to form water and acid.

• This is a reaction between salt and water to form acid and base

Which of the following solutions is suitable to be used to indicate neutralisation between acid and alkali?

• Iodine solution

• Sodium hydroxide solution

• Colour paper

• Universal indicator

What is the meaning of the above hazard warning symbol?

• Corrosive

• Explosive

• Toxic

• Radioactive

Acid in our stomach:

• Hydrochloric acid

• Sulfuric acid

• Acetic acid

• Carbonic acid

Rain water is slightly acidic. What is its pH?

• 1.0

• 5.6

• 7.0

• 8.2

• PH scale

• pH ruler

• pH scale

• pH statistical tables

According to the pH range which substance is more acidic than lemon juice?

• hydrochloric acid

• cabbage

• milk

• lye

Complete the word equation below:

Acid + alkali --> ............... + water

• water

• salt

• gold

• metal