Prueba Simple Test - Cloud 9 Academy

What happens to the pieces of litmus paper?

None of them change colour.

Only red litmus paper changes colour.

Only blue litmus paper changes colour.

Both litmus papers change colour.

Which statements are properties of an acid?

1. Reacts with ammonium sulfate to form ammonia.
2. Turns red litmus blue.

Only 2 is correct.

None of them is correct.

1 and 2 are correct.

Only 1 is correct.

The diagram shows two substances, X and Y, being heated together.

The Universal Indicator paper turns blue during the experiment.
What are substances X and Y?

Ammonium nitrate and hydrochloric acid.

Sodium carbonate and sodium hydroxide.

Sodium carbonate and hydrochloric acid.

Ammonium nitrate and sodium hydroxide.

Which property is not characteristic of a base?

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It turns universal indicator blue.

It reacts with a carbonate to form carbon dioxide.

It reacts with an ammonium salt to form ammonia.

It reacts with an acid to form a salt.