can someone please help me woth these 5 multiple choice questions as i am very confused! thank you

Question 1 0/1 pts The most basic compound in the series of aromatic amine compounds shown below, shows 5 signals in the 13C NMR. What is the structure of this compound? A) CI B) NH2 H2N C) NO2 D) OCHZ H2N H2N B D The structure of diisopropyl maleate is shown in the box. How many signals would you expect to observe in the 13C NMR spectrum of this molecule? diisopropyl maleate A) 8 B) 4 C) 3 D) 2 A The Newman of 2,3,4-trimethylpentane is shown in the box. Predict the number of signals in 13C NMR. - Please remember that NMR cannot distinguish between conformers. - H .. , . CH(CH3)2 . 2,3,4-trimethylpentane A) three signals B) four signals C) six signals D) seven signals Question 4 1/1 pts Which of the following is expected to show three signals in the 13C NMR? A) B) D) A SB D D Question 5 0 / 1 pts Which of these compounds is expected to show 8 signals in the 13C NMR? - Hint: This compound is a very important blue dye. O . OH A) OH ) B) NH 6 O os Na C) D) o IZ Na N N Na* O oc D