Curriculum
Course: IAL Edexcel Linear (Chemistry)
Login

Curriculum

IAL Edexcel Linear (Chemistry)

Unit 1. Structure, Bonding and Introduction to Organic Chemistry

0/52 Dr Dabour Hub Science Diagram and Course Material

Unit 2. Energetics, Group Chemistry, Halogenoalkanes and Alcohols

0/68 Dr Dabour Hub Science Diagram and Course Material

Unit 3. Practical Skills in Chemistry I

0/13 Dr Dabour Hub Science Diagram and Course Material

Unit 4. Rates, Equilibria and Further Organic Chemistry

0/71 Dr Dabour Hub Science Diagram and Course Material

Unit 5. Transition Metals and Organic Nitrogen Chemistry

0/57 Dr Dabour Hub Science Diagram and Course Material

Unit 6. Practical Skills in Chemistry II

0/17 Dr Dabour Hub Science Diagram and Course Material
Quiz

4.8 Organic Analytical Techniques — Notes – Exam questions

Submit quiz
Once you submit, you will no longer be able to change your answers. Are you sure you want to submit the quiz?
Cancel Submit
  • Questions count: 10
  • Passing grade: B+
Start Quiz
1.

Infrared spectroscopy identifies

functional groups from the absorption of characteristic wavenumbers
molecular mass
isotopes
empirical formula
2.

A strong, sharp absorption near 1700 cm⁻¹ indicates

an O–H group
a C–H group
a C=O group
a C≡N group
3.

A very broad absorption at 2500–3000 cm⁻¹ indicates

O–H in an alcohol
O–H in a carboxylic acid
N–H
C=C
4.

In a mass spectrum, the molecular ion peak gives

the number of carbon atoms directly
the relative molecular mass
the functional groups
the boiling point
5.

The M+1 peak is due to

loss of hydrogen
an impurity
the presence of ¹³C
²H only
6.

A compound containing one chlorine atom shows M and M+2 peaks in the ratio

1 : 1
3 : 1
1 : 3
9 : 1
7.

A compound containing one bromine atom shows M and M+2 peaks in the ratio

3 : 1
1 : 3
2 : 1
1 : 1
8.

A peak at m/e 15 in a mass spectrum is likely to be due to

C₂H₅⁺
OH⁺
CHO⁺
CH₃⁺
9.

The number of carbon atoms n is found from

n = M/12
n = M+1
n = 100 × (abundance of M+1)/(1.1 × abundance of M)
n = 1.1 × M
10.

An alcohol and a carboxylic acid can be distinguished by infrared because only the acid shows

a C=O absorption near 1700 cm⁻¹
an O–H absorption
a C–H absorption
a C–O absorption
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
Part of Unit 4. Rates, Equilibria and Further Organic Chemistry — see every lesson and quiz in this unit.
Accepted payment methods