QUIZIZZ SUPERTRAINER 1. - FUN WITH CHEMISTRY

Who found electron?

• JJ Thompson

• John Dalton

• Ernest Rutherford

• James Chadwick

Who found proton?

• JJ Thompson

• Ernest Rutherford

(a)   is biodegradable.

What is a characteristic of strong acids?

• They completely dissociate into ions in water.

• They have a high pH value.

• They partially dissociate in water.

• They do not conduct electricity well.

Which of the following is an example of a strong acid?

• Ethanoic acid

• Hydrochloric acid

• Citric acid

• Carbonic acid

What is the pH value range of strong acids?

• Less than 3

• Between 3 and 7

• Greater than 7

• Exactly 7

What happens to a glowing splint in the presence of oxygen?

• It relights

• It changes color

• It extinguishes

• It makes a popping sound

Why is it difficult to identify gases based on their appearance?

• Gases are always visible.

• Gases have distinct shapes.

• Gases are often colorless and odorless.

• Gases are usually colorful and have strong odors.

What is the effect of chlorine on damp blue litmus paper?

• It turns it yellow.

• It has no effect.

• It turns it red and then bleaches it white.

• It turns it green.

What is the concentration of oxygen in the air?

• 50%

• 75%

• 21%

• 10%