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In the following sentence, four words/phrases have been underlined. One of them is incorrect. Choose the incorrect word/phrase from the given options. The color of the litmus paper change when we put acid in the beaker.

In the following sentence, four words/phrases have been underlined. One of them is incorrect. Choose the incorrect word/phrase from the given options. The color of the litmus paper change when we put acid in the beaker. Correct Answer change

The correct answer is 'change'.

Key Points

  • The error lies in the incorrect usage of the verb 'change'.
  • There are two rules working simultaneously in the given sentence: 
    • Rule of preposition: It states if there is a preposition in the sentence, then the verb of the sentence will be according to the noun preceding the preposition.
      • Example: The aroma of these roses is very pleasant.
    • Subject-verb agreement: It states that the verb corresponding to the singular subject will be singular and the verb corresponding to the plural subject is plural.
      • Example:
        • He is planning a trip to Kerala.
        • They are planning a trip to Kerala.
  • The subject of the sentence i.e. 'color' is singular, therefore, according to subject-verb agreement the verb should be singular.
  • Therefore, 'change' should be replaced with 'changes'.

Therefore, the correct sentence is: The color of the litmus paper changes when we put acid in the beaker.

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