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Chemistry
UTME / JAMB 2008
Organic Chemistry I: Hydrocarbons & Crude Oil
Solution
The type of isomerism shown by cis- and trans- isomers is
A
optical isomerism
B
positional isomerism
C
functional isomerism
D
geometrical isomerism
medium Difficulty
Verified Correct Answer: Option D
Chemical Principles & Mechanism
The type of isomerism shown by the cis- and trans- isomers is geometrical isomerism
Source: Myschool Past Questions Archive (Record #4074)
Chemistry
UTME / JAMB 2008
Organic Chemistry II: Functional Groups, Polymers & Biomolecules
Solution
If the silver mirror test is positive, it indicates the presence of an
A
alkyne
B
alkanol
C
alkanone
D
alkanal
medium Difficulty
Verified Correct Answer: Option D
Chemical Principles & Mechanism
Alkanals give a positive result for the silver mirror test(Tollen's reagent).
Source: Myschool Past Questions Archive (Record #4075)
Chemistry
UTME / JAMB 2008
Organic Chemistry II: Functional Groups, Polymers & Biomolecules
Solution
Reduction of alkanones with LialH4 produces
A
primary alkanols
B
secondary alkanols
C
tertiary alkanols
D
polyhydric alkanols
medium Difficulty
Verified Correct Answer: Option B
Chemical Principles & Mechanism
Reduction of alkanones with \(LiAlH_4\) produces secondary alkanols.
Source: Myschool Past Questions Archive (Record #4274)
Chemistry
UTME / JAMB 2008
Organic Chemistry I: Hydrocarbons & Crude Oil
Solution
The product obtained when a mixture of benzene vapour and hydrogen are passed over nickel catalyst at 180ºC is
A
cyclohexane
B
cyclopentane
C
n- hexane
D
n - pentane
medium Difficulty
Verified Correct Answer: Option A
Chemical Principles & Mechanism
When a mixture of benzene vapour and hydrogen are passed over a nickel catalyst at 180ºc cyclohexane will be produced
Source: Myschool Past Questions Archive (Record #4275)
Chemistry
UTME / JAMB 2008
Metals, Transition Elements & Extraction
Solution
Polyvinyl chloride is used in the production of
A
glass
B
alloy
C
pipes
D
ceramics
medium Difficulty
Verified Correct Answer: Option C
Chemical Principles & Mechanism
Polyvinyl chloride is used in the production of pipes. Polyvinyl chloride (PVC) is an odorless and solid plastic. It is most commonly white but can also be colorless or amber. It can also come in the form of white powder or pellets. PVC is made from vinyl chloride. The chemical formula for vinyl chloride is \(C_2H_3Cl\)
Source: Myschool Past Questions Archive (Record #4276)
Chemistry
UTME / JAMB 2008
Organic Chemistry II: Functional Groups, Polymers & Biomolecules
Solution
Detergents are manufactured with straight hydrocarbon chains so as to make them
A
soluble
B
biodegradable
C
cheaper
D
foamy
medium Difficulty
Verified Correct Answer: Option B
Chemical Principles & Mechanism
The choice of straight hydrocarbon chains primarily serves the purpose of enhancing the biodegradability of the detergent, making it less harmful to the environment once it is washed away.Since unbranched (i.e., straight) chains are more prone to attack by bacteria, therefore in most of the detergents used these days, the branching is kept to be minimum so that the detergents become easily biodegradable.
Source: Myschool Past Questions Archive (Record #4279)
Chemistry
UTME / JAMB 2008
Organic Chemistry II: Functional Groups, Polymers & Biomolecules
Solution
If glucose is heated with concentration tetraoxosulphate (VI) acid, it will be dehydrated to
A
carbon
B
carbon (IV) oxide
C
ethene
D
ethanol
medium Difficulty
Verified Correct Answer: Option A
Chemical Principles & Mechanism
If glucose is heated with concentrated tetraoxosulphate(VI)acid, it will be dehydrated to carbon.
Source: Myschool Past Questions Archive (Record #4076)
Chemistry
UTME / JAMB 2008
Stoichiometry, Mole Concept & Volumetric Analysis
Diagram
Solution
The IUPAC nomenclature for the structure above is
Attached Figure / Diagram
A
2, 3 - dichloro - 4, 4, 5 - trimethyl pent - 2 - ene
B
4, 5 - dichloro - 2, 3 - dimethyl hex - 2 - ene
C
2, 3 - dichloro - 4, 4 - dimethyl hex - 2- ene
D
2, 3 dichloro - 2, 2 - dimethyl hex - 2 - ene
medium Difficulty
Verified Correct Answer: Option C
Chemical Principles & Mechanism
The longest carbon chain in the compound is the hex-2-ene.
Counting all the attachments, the IUPAC nomenclature of the compound is 2,3 - dichloro-4,4- dimethyl hex-2-ene.
Source: Myschool Past Questions Archive (Record #4249)
Chemistry
UTME / JAMB 2008
Organic Chemistry I: Hydrocarbons & Crude Oil
Solution
A red precipitate of copper (I) carbide is formed when ammonium solution of copper (I) chloride is introduced into
A
CH2 = CH - CH2 - CH3
B
CH3 CH2 - C ≡ CH
C
CH3 CH2 CH2 CH3
D
CH3 - C C - CH3
medium Difficulty
Verified Correct Answer: Option B
Chemical Principles & Mechanism
Terminal alkynes react with ammoniacal copper(I)chloride to produce a red precipitate.
Source: Myschool Past Questions Archive (Record #4270)
Chemistry
UTME / JAMB 2008
Organic Chemistry II: Functional Groups, Polymers & Biomolecules
Solution
Reduction of nitroalkanes, nitrites and amides is a route for the preparation of
A
amines
B
alkenes
C
polymers
D
detergents
medium Difficulty
Verified Correct Answer: Option A
Chemical Principles & Mechanism
Reduction of nitroalkanes, nitrites and amides is a route for the preparation of amines
Source: Myschool Past Questions Archive (Record #4272)
Chemistry
UTME / JAMB 2008
Stoichiometry, Mole Concept & Volumetric Analysis
Choose the correct option from the structure above
A
A
B
B
C
C
D
D
medium Difficulty
Verified Correct Answer: Option C
Chemical Principles & Mechanism
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Official Exam / Past Question Archive
Chemistry
UTME / JAMB 2008
Non-Metals & Their Compounds
Diagram
Solution
Use the diagram to answer this question. The gas that can be used to demonstrate the experiment is
Attached Figure / Diagram
A
hydrogen chloride
B
hydrogen sulphide
C
nitrogen(ll) oxide
D
dinitrogen (l) oxide
medium Difficulty
Verified Correct Answer: Option A
Chemical Principles & Mechanism
Hydrogen chloride; main reason for using it to demonstrate fountain experiment because of its high solubility in water.
Source: Myschool Past Questions Archive (Record #31652)
Chemistry
UTME / JAMB 2008
Stoichiometry, Mole Concept & Volumetric Analysis
Diagram
Solution
Use the diagram to answer this question.The colour of the fountain water is
Attached Figure / Diagram
A
blue
B
orange
C
red
D
yellow
medium Difficulty
Verified Correct Answer: Option C
Chemical Principles & Mechanism
fountain water has red colour.
Source: Myschool Past Questions Archive (Record #31653)
Chemistry
UTME / JAMB 2008
Stoichiometry, Mole Concept & Volumetric Analysis
Diagram
Choose the correct option from the structure above
Attached Figure / Diagram
A
A
B
B
C
C
D
D
medium Difficulty
Verified Correct Answer: Option C
Chemical Principles & Mechanism
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #31657)
English Language
UTME / JAMB 2008
Lexis, Structure & Register (Cloze & Vocabulary)
In question number 25 above choose the best option from letters A- D that best complete the gap
A
rational
B
reactional
C
proactive
D
radical
medium Difficulty
Verified Correct Answer: Option A
Grammar & Contextual Explanation
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Official Exam / Past Question Archive