Spectroscopy  - 13C NMR Practice 1

Spectroscopy - 13C NMR Practice 1

12th Grade

20 Qs

quiz-placeholder

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Spectroscopy  - 13C NMR Practice 1

Spectroscopy - 13C NMR Practice 1

Assessment

Quiz

Science

12th Grade

Medium

Created by

John Aloi

Used 1+ times

FREE Resource

20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Select the factors that affect the energy difference between two nuclear spin states.

The type of nucleus

Which atoms are directly bonded to the nucleus

The electronegativity of neighbouring atoms.

All of these.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Select the best definition for chemical environment.

The solvent used to dissolve the sample.

The measure of the electron withdrawing ability of an atom.

The energy required to change an atom's nuclear spin.

The atom or groups of atoms surrounding a nucleus.

3.

FILL IN THE BLANK QUESTION

1 min • 1 pt

When the local magnetic field from electrons reduces the magnetic field experienced by a nucleus. Answer is caps sensitive.

4.

FILL IN THE BLANK QUESTION

1 min • 1 pt

When the electron density is pulled away from the nucleus so it experiences a greater applied magnetic field. Answer is caps sensitive.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Identify which molecule’s carbon atom will be the most deshielded.

Media Image
Media Image
Media Image

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Why do the use tetramethylsilane (TMS) as the reference compound in NMR spectrometry? Choose best answer.

TMS is chemically inert, so won’t react with the compound(s) in the sample.

Is symmetrical so there is only one chemical environment.

It produces one peak that is located away from the peaks of interest.

All of these.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Select the best definition for the chemical shift of an NMR signal.

How many different chemicals the peak represents.

The different type of bonds in the molecule.

The number of carbon atoms in the environment.

The position of the peak relative to the TMS peak (at 0)

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