1.
State what is meant by a homologous series. [1]
JD SCIENCE
Module 4 Core organic chemistry
Answer all questions. Show working. Answers are in a separate file on the Worksheets page — do not look at them until you have finished.
2.
State what is meant by isomerism. [1]
3.
State what is meant by a nucleophile. [1]
4.
State what is meant by an electrophile. [1]
5.
State what is meant by free-radical substitution. [1]
6.
State what is meant by electrophilic addition. [1]
7.
State what is meant by nucleophilic substitution. [1]
8.
State what is meant by oxidation of alcohols. [1]
9.
State what is meant by a carbonyl test. [1]
10.
State what is meant by optical isomerism. [1]
11.
Grace is asked about a homologous series in a OCR Chemistry paper.
(a) Describe a homologous series. [2]
(b) Explain why a homologous series is important in this topic. [3]
12.
Grace is asked about isomerism in a OCR Chemistry paper.
(a) Describe isomerism. [2]
(b) Explain why isomerism is important in this topic. [3]
13.
Grace is asked about a nucleophile in a OCR Chemistry paper.
(a) Describe a nucleophile. [2]
(b) Explain why a nucleophile is important in this topic. [3]
14.
Grace is asked about an electrophile in a OCR Chemistry paper.
(a) Describe an electrophile. [2]
(b) Explain why an electrophile is important in this topic. [3]
15.
Grace is asked about free-radical substitution in a OCR Chemistry paper.
(a) Describe free-radical substitution. [2]
(b) Explain why free-radical substitution is important in this topic. [3]
16.
Grace is asked about electrophilic addition in a OCR Chemistry paper.
(a) Describe electrophilic addition. [2]
(b) Explain why electrophilic addition is important in this topic. [3]
17.
Molecular formula of hexane [3]
18.
How many structural isomers of C₄H₁₀ [3]
19.
Mr of CH₃COOH [3]
20.
Moles in 6.0 g of ethanoic acid [3]
21.
A chiral carbon is in CH₃CHBrCH₂CH₃. How many optical isomers [3]
22.
Percentage yield 7.2 g from theoretical 9.0 g [3]
23.
Grace carries out a OCR-style required practical linked to organic chemistry. This is a typical OCR required-practical style question.
(a) Identify the independent variable and the dependent variable. [2]
(b) State one control variable and explain why it must be controlled. [2]
(c) Suggest one improvement or source of error and how it affects the result. [2]
24.
Grace carries out collecting valid data for organic chemistry. This is a typical OCR required-practical style question.
(a) Identify the independent variable and the dependent variable. [2]
(b) State one control variable and explain why it must be controlled. [2]
(c) Suggest one improvement or source of error and how it affects the result. [2]
25.
Grace carries out drawing a graph for organic chemistry. This is a typical OCR required-practical style question.
(a) Identify the independent variable and the dependent variable. [2]
(b) State one control variable and explain why it must be controlled. [2]
(c) Suggest one improvement or source of error and how it affects the result. [2]
26.
Grace carries out evaluating a method about organic chemistry. This is a typical OCR required-practical style question.
(a) Identify the independent variable and the dependent variable. [2]
(b) State one control variable and explain why it must be controlled. [2]
(c) Suggest one improvement or source of error and how it affects the result. [2]
27.
Compare a homologous series with isomerism. [4]
28.
Compare isomerism with a nucleophile. [4]
29.
Compare a nucleophile with an electrophile. [4]
30.
Compare an electrophile with free-radical substitution. [4]
31.
Apply your knowledge of nucleophilic substitution to this situation: Sn1 or Sn2 [3]
32.
Apply your knowledge of oxidation of alcohols to this situation: acidified dichromate [3]