Which of the following word is not correct?

1.What could be the most appropriate title for the passage?

2.The word '$irrevocable^{\prime} in the$ sentence, 'Lead poisoning in the city is causing irrevocable harm $\to our children^{\prime} means$

3.The synonym of '$impromptu^{\prime} is$

4.The antonym of '$plaintiff^{\prime}$ is-

5.The word '$irrevocable^{\prime} in the sentence$ 'Lead poisoning in the city is causing irrevocable harm $\to our children^{\prime}$ means-

6.Choose the appropriate preposition : He was angry ¾ me for losing the book.

7.Choose the proper word : I would frown ¾ that sort of snobbish attitude.

8.Verb of the word '$simplification^{\prime}$ is-

9.Choose the proper word to complete the following sentence. He stopped his car ¾ when the light turned red.

10.Choose the right option for gap. Give her a telephone number to ring ¾ she gets lost.

11.Choose the correct spelling

12.When we arrived at the shop, we noticed that someone $\ldots\ldots into our$ place.