Each item in this section has a sentence with three underline parts labelled. Read the sentence to find out whether there is any error in any underline part

Step-by-step solution

We do not use the indefinite articles ' a ' or 'an' with uncountable nouns. Thus, 'a liquid' is incorrect. The correct sentence will be 'When a gas is cooled down it turns into liquid from a process called condensation.'.