In the monochlorination of Toluene, in presence of Fecl3 as catalyst, how many possible isomers can be obtained? A. One
B. Two
C. Three

please tell me how I am supposed to know the answer if I get a similar question next time.

Which statement about sound is not true? a. air particles travel with sound waves. b. sound waves cannot travel through a vacuum. c. sound waves exist even if no one hears them. d. air particles vibrate along the path of a sound wave.

Non renewable resources like petroleum eventually

Which of these conditions most likely produces an unstable isotope?