Which of the following statements are TRUE for first-order analyses of NMR spectra (the type of analysis most commonly done). a. Carbon-13, an NMR-active nucleus, has a nuclear spin quantum number of 0.
b. First-order multiplets are symmetrical, and their chemical shift is given by the position of the first peak in the multiplet.
c. The spin-multiplicity of the proton NMR absorption of the methylene group in ethanol-OD is 4. Equivalent protons do not split each other.
d. The difference in absorption frequency is equal to or less than 6 J.

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.