Question

Read the sentence to find out whether there is any grammatical or idiomatic error in it. The error, if any, will be in one part of the sentence. The letter of that part is the answer. If there is ‘No error’, the answer is (5). (Ignore errors of punctuation, if any). The most common contaminant (

Q: Answer-Read the sentence to find out whether there is any grammatical or idiomatic error in it. The error,...

The error is in part C. The phrase is dissolve nitrogen is incorrect. The correct form should be is dissolved nitrogen, because dissolved is the past participle form used to describe the state of nitrogen in the water. The corrected sentence should be The most common contaminant identified in groundwater is dissolved nitrogen in the form of nitrate in sub-surface waters.