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    Question

    Read each sentence to find out whether there is any

    grammatical error in it. The error, if any, will be in one part of the sentence. Mark the part with the error as your answer. If there is no error, mark ‘No error’ as your answer (Ignore the errors of punctuation, if any). After several rounds of trial and error, (1)/ the researchers found they could (2)/ maximise percarbamide produce by (3)/ holding the concentration of urea between 15% and 38%. (4)/ no error (5)
    A 1 Correct Answer Incorrect Answer
    B 2 Correct Answer Incorrect Answer
    C 3 Correct Answer Incorrect Answer
    D 4 Correct Answer Incorrect Answer
    E No error Correct Answer Incorrect Answer

    Solution

    The word "produce" in part (3) is incorrect. The sentence is talking about the action of maximizing the production of percarbamide, so the correct noun form is "production" (not "produce," which is a verb).

    The correct sentence should read: "After several rounds of trial and error, the researchers found they could maximise percarbamide production by holding the concentration of urea between 15% and 38%."

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