Which of the labeled H atoms (1 -5) in the following molecule would be predicted to be the most acidic?

Which of the molecules gives rise to a molecular ion with an odd value of m/z?

Which of the followings compounds matches the below IR spectrum?  

Provide the structure for N-phenyl-N-propyl-2,3-dimethylbutanamide?

An unknown compound X has the molecular formula C6H14O. Compound X shows a peak in its IR spectrum at 3200-3600 cm-1. The 1H NMR spectral data for compound X is given below. What is the structure of compound X?

Identify which one of the following isomers of C6H14 has the C-13 NMR below.

Which of the following compounds matches IR spectrum below?   _____

Which compound gives the following 1H NMR spectrum?

Which of the following C4H7OCl compounds best fits the proton NMR spectrum shown below? (The numbers above the peaks are integration values.)

A compound with molecular formula C4H11N exhibits a triplet at d 0.9 (3H), a doublet at d 1.1 (3H), a quintet at d 1.4 (2H), a singlet at d 1.7 (2H) and a sextet at d 2.8 (2H) in its 1H NMR spectrum. Its IR spectrum shows two medium absorption bands near 3400 cm-1. What is the IUPAC name of this compound?