Monday 18 October 2021 – Morning
A Level Chemistry B (Salters)
H433/03 Practical skills in chemistry
Time allowed: 1 hour 30 minutes
INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and d
...
Monday 18 October 2021 – Morning
A Level Chemistry B (Salters)
H433/03 Practical skills in chemistry
Time allowed: 1 hour 30 minutes
INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• Write your answer to each question in the space provided. If you need extra space use
the lined pages at the end of this booklet. The question numbers must be clearly shown.
• Answer all the questions.
• Where appropriate, your answer should be supported with working. Marks might be
given for using a correct method, even if your answer is wrong.
INFORMATION
• The total mark for this paper is 60.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in questions marked with an asterisk (*).
• This document has 16 pages.
ADVICE
• Read each question carefully before you start your answer
Answer all the questions.
1 Alcohols are useful intermediates and react to give a variety of products.
For example, butan-1-ol can be oxidised to other useful products as shown below.
(a) Complete the flow diagram by writing on the dotted lines and drawing skeletal formulae in the
empty boxes.
Silver mirror
formed
skeletal formula
of organic product
skeletal formula
of organic product
butan-1-ol
What is seen when the reaction occurs?
.....................................................
.....................................................
H
H
H
C
H
H
C
H
H
C
H
H
C O H
distil
with acidified
dichromate
solution
reflux
with acidified
dichromate
solution
warm with Fehling’s solution
reagent ............................................
[4]
(b) Butan-2-ol is an isomer of butan-1-ol.
Alcohols can be categorised as primary, secondary or tertiary
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