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Module 4 Topic Test – Core Organic Chemistry

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1 Which volume of oxygen gas, at room temperature and pressure, is required for complete combustion of 1.25 × 10–3 mol of propan-1-ol? A 105 cm3 B 120 cm3 C 135 cm3 D 150 cm3 Your answer [1] 2 Three of the following displayed formulae represent the same isomer of C3H4...

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  • November 19, 2021
  • 16
  • 2020/2021
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OCR AS/A Level Chemistry A
(H032/H432)


Module 4 Topic Test – Core Organic Chemistry

1 Which volume of oxygen gas, at room temperature and pressure, is required
for complete combustion of 1.25 × 10–3 mol of propan-1-ol?

A 105 cm3

B 120 cm3

C 135 cm3

D 150 cm3


C
Your answer [1]




2 Three of the following displayed formulae represent the same isomer of
C3H4Cl2 but one structure represents a different isomer, X.

Which displayed formula represents X?




D
Your answer [1]




Page

, OCR AS/A Level Chemistry A
(H032/H432)


3 Which alcohol will not react with potassium dichromate(VI) in sulfuric acid?

A H3CH2CH(OH)CH2CH3

B CH3CH2CH(CH3)CH2OH

C (CH3)2CHCH(CH3)OH

D (CH3CH2)2C(CH3)OH

D
Your answer [1]




4 A section of a polymer chain is shown below.




Identify the monomer that would give rise to this section of addition polymer.

A E-But-2-ene

B Z-But-2-ene

C Methylpropene

D Propene


D
Your answer [1]




Page

, OCR AS/A Level Chemistry A
(H032/H432)
Module 4 Topic Test – Core Organic
Chemistry

5 Which statement about the two alkenes CH3CH2CH=CH2 and
CH3CH=CHCH3 is correct?

A Neither exhibits cis–trans isomerism.

B Neither may be polymerised.

C Neither reacts with bromine to form 1,4-dibromobutane.

D Neither reacts with hydrogen to form butane.

C
Your answer [1]




6 Hydrobromic acid reacts with ethene to form

bromoethane. What is the best description of the

organic intermediate?


A It is a free radical.

B It contains carbon, hydrogen and bromine.

C Its structure is planar.

D It is an electrophile.

D
Your answer [1]
I don’t think it can be a free radical because the molecule split heterolytically
so formed a carbocation (electrophile)?

7 1,2-Dibromo-3-chloropropane (DBCP) has been used in the control of
earthworms in agricultural land.

What would be the best synthesis of DBCP?


A CH3CH2CH2Cl + 2Br2 ⟶ DBCP + 2HBr

B CH3CHBrCH2Br + Cl2 ⟶ DBCP + HCl

C CH2=CHCHBr2 + HCl ⟶ DBCP

D CH2=CHCH2Cl + Br2 ⟶ DBCP

D
Your answer [1]

© OCR Page 3

2016

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