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Nuclear Magnetic Resosnance Spectrocopy and Evaulation of Simple 1H NMR Spectra of Select Organic Compounds

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1. An unknown molecule A has 4 signals in the 1H NMR spectrum. Which of the following corresponds to molecule A?

a: It has only one type of proton. Explanation

Explanation

b: It has only two types of protons. Explanation

Explanation

c: It has four types of protons. Explanation

Explanation

d: It has six types of proton. Explanation

Explanation

2. What is the splitting pattern of the methylene protons in propane?

a: Triplet Explanation

Explanation

b: Quartet Explanation

Explanation

c: Doublet Explanation

Explanation

d: Septet Explanation

Explanation

3. How many different H environments for the molecule are shown? Question Image

a: 4 Hydrogen environment, in (3.3.1.3) ratio Explanation

Explanation

b: 4 Hydrogen environment, in (3.1.6.3) ratio Explanation

Explanation

c: 3 Hydrogen environment, in (6.1.3) ratio Explanation

Explanation

d: 3 Hydrogen environment, in (3.6.3) ratio Explanation

Explanation

4. What is the multiplicity of the hydrogen bonded to oxygen in an NMR spectrum of pure ethanol?

a: Quintet Explanation

Explanation

b: Triplet Explanation

Explanation

c: Doublet Explanation

Explanation

d: Quartet Explanation

Explanation

5. Which of the following statements about the energy of an applied magnetic field is FALSE?

a: This energy can “flip” a proton from alignment with the field to alignment opposite the field. Explanation

Explanation

b: Nuclei are “in resonance” when they absorb this energy. Explanation

Explanation

c: This energy is proportional to the magnetic field strength. Explanation

Explanation

d: This energy is supplied by radiation in the visible region of the spectrum. Explanation

Explanation

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