Test

Which of the following is NOT a property of an acid?

• Tastes sour

• Corrosive

• Changes the colour of blue litmus paper to red

• Has a pH value higher than 7

What is an indicator?

• An indicator is a laboratory apparatus

• An indicator is a type of chemical

• An indicator shows whether a solution is acidic or alkaline

• An indicator is type of chemical solution

Which of the following NOT a property of an alkali?

• Corrosive

• Changes the colour of blue litmus paper to red

• Tastes bitter

• Has pH value higher than 7

What type of acid can be found in carbonated drink?

• Hydrochloric acid

• Citric acid

• Carbonic acid

Is it acid or alkali when the pH is 4

• Acid

• Alkali

• Neutral

What is an example of neutral substance

• Vinegar

• Distilled water

• Milk

What colour does red litmus paper turn when added to an alkali?

• Blue

• Red

• Colourless

Which of the following will change the red litmus paper to blue?

• Nitric Acid

• Hydrochloric acid

• Sodium hydroxide

• Sulphuric acid

Blue and red litmus paper are added into a container containing a solid substance. After 5 minutes no change occur to the blue litmus paper and red litmus paper. which of the following is the reason for these results?

• The substance is alkali

• The substance is acidic

• The substance is neutral

• Acid and alkali shows their properties only in the presence of water

Which of the following is not an indicator?

• Phenolphthalein

• Colour pen

• Universal indicator

• Red litmus paper