SL Analytical chemistry_H NMR & IHD

What is the index of hydrogen deficiency (IHD) in cyclohexanol?

• 0

• 1

• 2

• 3

What is the degree of unsaturation (index of hydrogen deficiency) for the molecule?

• 1

• 2

• 4

• 5

What is the Index of Hydrogen Deficiency (IHD) for 1,3,5-hexatriene (C₆H₈)?

• 1

• 3

• 5

• 6

What is the index of hydrogen deficiency (IHD) for this molecule?

• 3

• 4

• 5

• 6

Which molecule has an index of hydrogen deficiency (IHD) = 1?

• C₆H₆

• C₂Cl₂

• C₄H₉N

• C₂H₆O

Which region of the electromagnetic spectrum is used to identify hydrogen environments in a molecule?

• X-ray

• IR

• UV

• radio waves

What is the ratio of the areas of the signals in the ¹H NMR spectrum of pentan-3-ol CH₃CH₂CH(OH)CH₂CH₃

• 6:4:1:1

• 6:2:2:2

• 5:5:1:1

• 3:3:2:2:1:1

What can be determined about a molecule from the number of signals in its ¹HNMR spectrum?

• Bonds present

• Molecular formula

• Molecular mass

• Number of hydrogen environments

What can be deduced from the following ¹HNMR spectrum?

• There is only one hydrogen atom in the molecule.

• There is only one hydrogen environment in the molecule.

• The molecule is a hydrocarbon.

• There is only one isotope in the element.

What is always correct about the molecular ion, M⁺, in a mass spectrum of a compound?

• The M⁺ ion peak has the smallest m/z ratio in the mass spectrum.

• The m/z ratio of the M⁺ ion peak gives the relative molecular mass of the molecule.

• The M⁺ ion is the most stable fragment formed during electron bombardment.

• The M⁺ ion peak has the greatest intensity in the mass spectrum.