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Chemistry
UTME / JAMB 2009
Non-Metals & Their Compounds
Solution
The gasification of coke is used for the manufacturing of?
A
producer gas
B
natural gas
C
synthetic gas
D
industrial gas
medium Difficulty
Verified Correct Answer: Option A
Chemical Principles & Mechanism
Producer gas is manufactured by the partial combustion or gasification of coke (or coal) in a furnace where a limited supply of air and steam is passed through a red-hot bed of coke. This process yields a gaseous fuel consisting primarily of carbon monoxide (CO), hydrogen (H\(_2\)), and a high concentration of nitrogen (N\(_2\)) from the injected air.
Source: Myschool Past Questions Archive (Record #4329)
Chemistry
UTME / JAMB 2009
Metals, Transition Elements & Extraction
In the electrolytic extraction of aluminum, the function of the molten cryolite is to
A
precipitate aluminium hdroxide
B
lower the melting point of aluminium oxide
C
act as a raw materials
D
act as a solvent
medium Difficulty
Verified Correct Answer: Option B
Chemical Principles & Mechanism
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #4345)
Chemistry
UTME / JAMB 2009
Organic Chemistry I: Hydrocarbons & Crude Oil
A cracking process in petroleum refining can be represented by
A
heptane to heptene
B
heptane to 3-methylhexane
C
heptane to propene and butane
D
heptane to 2,3,3-trimethybutane
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 #4347)
Chemistry
UTME / JAMB 2009
Organic Chemistry II: Functional Groups, Polymers & Biomolecules
Which of the following class of compounds can exist as dipolar ions in solution?
A
Alkanoic acid
B
Fatty acids
C
Dialkanoic acids
D
Amino acids
medium Difficulty
Verified Correct Answer: Option D
Chemical Principles & Mechanism
No expanded working has been attached for this question yet. The verified answer is Option D.
Source: Myschool Past Questions Archive (Record #4349)
Chemistry
UTME / JAMB 2009
Organic Chemistry II: Functional Groups, Polymers & Biomolecules
Solution
Lucas reagent is used to test for?
A
alkanes
B
alkanoic acids
C
alkanols
D
amines
medium Difficulty
Verified Correct Answer: Option C
Chemical Principles & Mechanism
Lucas' reagent is a solution of anhydrous zinc chloride in concentrated hydrochloric acid. This solution is used to classify alcohols.
Source: Myschool Past Questions Archive (Record #4456)
Chemistry
UTME / JAMB 2009
Organic Chemistry I: Hydrocarbons & Crude Oil
A compound commonly used for sterilization and preservation of specimens and food is
A
ethanol
B
benzene
C
ether
D
ammonia
medium Difficulty
Verified Correct Answer: Option A
Chemical Principles & Mechanism
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #4457)
Chemistry
UTME / JAMB 2009
Organic Chemistry I: Hydrocarbons & Crude Oil
Which of the following hydrocarbons is mainly used as fuel?
A
Methylene
B
Ethylene
C
Methane
D
Ethyne
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 #4459)
Chemistry
UTME / JAMB 2009
Stoichiometry, Mole Concept & Volumetric Analysis
The molecular formula of a common organic laboratory anaesthetic is
A
CHCl3
B
CHI3
C
CCl4
D
CHF3
medium Difficulty
Verified Correct Answer: Option A
Chemical Principles & Mechanism
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #4460)
Chemistry
UTME / JAMB 2009
Organic Chemistry I: Hydrocarbons & Crude Oil
Solution
The simplest branched-chain hydrocarbon is
A
ethane
B
ethene
C
propane
D
butane
medium Difficulty
Verified Correct Answer: Option D
Chemical Principles & Mechanism
The smallest branched alkane is isobutane. Notice that isobutane has the same molecular formula, C4H10, as n-butane but has a different structural formula.
Source: Myschool Past Questions Archive (Record #4461)
Chemistry
UTME / JAMB 2009
Atomic Structure, Orbitals & Nuclear Chemistry
Solution
If the relative atomic mass of an element is not a whole number, it can be deduced that the element is?
A
Naturally radioactive
B
abundant in nature
C
a transition metal
D
an isotopic mixture
medium Difficulty
Verified Correct Answer: Option D
Chemical Principles & Mechanism
This happens because the relative atomic mass is the average of all an element’s isotopes, weighted by how common each isotope is. If the isotopes have different masses, the average won’t be a whole number.
Source: Official Exam / Past Question Archive
Chemistry
UTME / JAMB 2009
Atomic Structure, Orbitals & Nuclear Chemistry
Solution
If the relative atomic mass of an element is not a whole number, it can be deduced that the element is?
A
Naturally radioactive
B
abundant in nature
C
a transition metal
D
an isotopic mixture
medium Difficulty
Verified Correct Answer: Option D
Chemical Principles & Mechanism
This happens because the relative atomic mass is the average of all an element’s isotopes, weighted by how common each isotope is. If the isotopes have different masses, the average won’t be a whole number.
Source: Myschool Past Questions Archive (Record #44097)
English Language
UTME / JAMB 2009
Lexis, Structure & Register (Cloze & Vocabulary)
In question number 25 above, choose the best option from letters A-D that best completes the gap.
A
analyze
B
present
C
organize
D
discuss
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
Biology
UTME / JAMB 2009
Reproduction in Plants & Animals
Solution
What is the level of organization of an onion bulb?
A
tissue
B
organ
C
systemic
D
organismal
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
Onion bulb is an example of organ in plant
Source: Myschool Past Questions Archive (Record #14779)
Biology
UTME / JAMB 2009
Respiration & Gaseous Exchange
A characteristic exhibited by all living organism is?
A
sexual reproduction
B
aerobic respiration
C
the ability to move from one place to another
D
the ability to remove unwanted substances
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option D.
Source: Myschool Past Questions Archive (Record #14780)
Biology
UTME / JAMB 2009
Variation & Genetics (Heredity)
Solution
In a cell, the genes are carried by?
A
nuclear membranes
B
chromatin threads
C
lysosomes
D
mitochondria
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
It is the chromatin threads that carry the genes in the cell. Chromatin is a complex of DNA and proteins that exists in a loose, thread-like form when the cell is not dividing. During cell division, this chromatin condenses to form chromosomes, which are more visible under a microscope. Genes, the functional units of heredity, are located on these chromatin threads.
Source: Myschool Past Questions Archive (Record #14781)