NMR 2

Question 1

The nuclei of many atoms have a quantity described as a ‘spin’. TRUE or FALSE

Answer 1

TRUE

Question 2

What is the nuclear spin (I) value of hydrogen and carbon 13 NMR ?

Answer 2

1/2

Question 3

What is the (I) of Carbon 12 and Oxygen and what does this mean in terms of NMR activity ?

Answer 3

I = 0, this means they are NMR inactive

Question 4

Integration allows us to measure relative intensity of the signals in the spectrum. TRUE or FALSE

Answer 4

TRUE

Question 5

Molecular vibrations are required at 1-10kcal/mol. TRUE or FALSE

Answer 5

TRUE

Question 6

Molecular rotations are required around 10-4 kcal/mol. TRUE or FALSE

Answer 6

TRUE

Question 7

Do deshielded hydrogens have a low or high chemical shift ?

Answer 7

High chemical shift

Question 8

Do deshielded hydrogens appear down or up field ?

Answer 8

Downfield, to the left hand side therefore higher chemical shift

Question 9

Do shielded hydrogens have a low or high chemical shift ?

Answer 9

Low chemical shift

Question 10

Do shielded hydrogens appear down or up field ?

Answer 10

Upfield, right hand side, lower chemical shift