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Chemistry
UTME / JAMB 2016
Stoichiometry, Mole Concept & Volumetric Analysis
An example of an acidic oxide is
A
NO
B
CO
C
SO2
D
CuO
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 #44548)
Chemistry
UTME / JAMB 2016
Stoichiometry, Mole Concept & Volumetric Analysis
Solution
What volume of 0.5M H2SO4 will exactly neutralize 20cm3 of 0.1M NaOH Solution?
A
2.0cm 3
B
5.0cm 3
C
6.8cm 3
D
8.3cm 3
medium Difficulty
Verified Correct Answer: Option A
Chemical Principles & Mechanism
The balanced equation is given as:
\(H_{2}SO_{4} + 2NaOH \to Na_{2}SO_{4} + 2H_{2}O\)
Molarity of \(NaOH = 0.1M\)
Volume of \(NaOH = 20cm^{3}\)
Molarity of \(H_{2}SO_{4} = 0.5M\)
mol NaOH = \(0.1 \times 20cm^{3} = 2molNaOH\)
⇒ \(2mol NaOH \times \frac{1mol H_{2}SO_{4}}{2mol NaOH} = 1 mol H_{2}SO_{4}\)
\(volume of H_{2}SO_{4} = \frac{mole of H_{2}SO_{4}}{molarity of H_{2}SO_{4}}\)
= \(\frac{1 mole}{0.5 M} = 2cm^{3} H_{2}SO_{4}\)
Source: Myschool Past Questions Archive (Record #44550)
Chemistry
UTME / JAMB 2016
Non-Metals & Their Compounds
Diamond cannot be used
A
In making bicycle chains
B
As abrasives
C
In cutting glass and metals
D
As dies for drawing wires
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 #44552)
Chemistry
UTME / JAMB 2016
Organic Chemistry II: Functional Groups, Polymers & Biomolecules
Ethanol is soluble in water due to the presence of a
A
Carbonyl group
B
Hydroxyl group
C
Phenyl group
D
Methyl group
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 #44555)
Chemistry
UTME / JAMB 2016
Atomic Structure, Orbitals & Nuclear Chemistry
Solution
The number of electronic shells contained in an atom with electron configuration 1S\(^2\)2S\(^2\)2P\(^6\)3S\(^2\)3P\(^6\)4S\(^2\) is
A
3
B
2
C
4
D
5
medium Difficulty
Verified Correct Answer: Option C
Chemical Principles & Mechanism
To determine the number of electronic shell, first, you need to add up the electrons (the numbers at the superscript or power).
1S\(^2\)2S\(^2\)2P\(^6\)3S\(^2\)3P\(^6\)4S\(^2\) → 2 + 2 + 6 + 2 + 6 + 2 = 20
Now we can represent the element with the atomic number 20 is shells i.e 2,8,8,2
This means first shell is 2, second shell is 8, third shell is 8, and the fourth shell is 2 = In total, there are 4 electron shells.
Source: Myschool Past Questions Archive (Record #44557)
Chemistry
UTME / JAMB 2016
Water, Solutions & Solubility
The drying agent suitable for drying ammonia is
A
Calcium Chloride
B
Calcium Oxide
C
Phosphorus(V) Oxide
D
Concentrated H2SO4
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 #44605)
Chemistry
UTME / JAMB 2016
Stoichiometry, Mole Concept & Volumetric Analysis
The arrangement of particles in crystal lattices can be studied using
A
X-rays
B
\(\beta\)-rays
C
\(\alpha\)-rays
D
\(\gamma\)-rays
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 #44606)
Chemistry
UTME / JAMB 2016
Non-Metals & Their Compounds
Solution
In the extraction of iron, the waste gas from the furnace is a mixture of
A
PH3 CO and CO2
B
CO and C
C
N2 , CO and CO2
D
PH3 and CO
medium Difficulty
Verified Correct Answer: Option C
Chemical Principles & Mechanism
the \(N_2\) from the hot air blast to burn the coke (48%), the \(CO\) (23%) and \(CO_2\) (21%) produced from the reduction of the iron ore \(Fe_{2}O_{3}\) by carbon (the coke) are the major components of the waste from the extraction.
Source: Myschool Past Questions Archive (Record #44607)
Chemistry
UTME / JAMB 2016
Acids, Bases, pH & Salts
Solution
In a neutralization reaction involving HCI and NaOH using litmus as indicator, the colour at the end point is
A
Blue
B
Red
C
Orange
D
Purple
medium Difficulty
Verified Correct Answer: Option D
Chemical Principles & Mechanism
Neutral litmus paper is purple. the result of a neutralization reaction is salt and water and hence is neutral.
Source: Myschool Past Questions Archive (Record #44608)
Chemistry
UTME / JAMB 2016
Water, Solutions & Solubility
An example of a solid emulsion is
A
Butter
B
Hair cream
C
Milk
D
Cod-liver oil
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 #44610)
Chemistry
UTME / JAMB 2016
Atomic Structure, Orbitals & Nuclear Chemistry
An isotope has an atomic number of 15 and a mass number of 31. The number of proton it contains is
A
16
B
15
C
31
D
46
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 #44611)
Chemistry
UTME / JAMB 2016
Kinetic Theory of Matter & Gas Laws
Solution
Calculate the volume in cm3 of oxygen evolved at s.t.p when a current of 5A is passed through acidified water for 193s?
[F = 96500 C mol1. Molar volume of a gas at s.t.p = 22.4dm3]
A
0.056dm3
B
0.224dm3
C
224.000dm3
D
56.000dm3
medium Difficulty
Verified Correct Answer: Option A
Chemical Principles & Mechanism
Q = 193 x 5 = 965C
40H \(\mapsto\) 2H2O + O2 + 4e
4 x 96500C = 22.4dm3
965C = x
x = \(\frac{22.4 \times 965}{4 \times 96500}\)
= 0.056dm3
Source: Myschool Past Questions Archive (Record #44615)
Chemistry
UTME / JAMB 2016
Stoichiometry, Mole Concept & Volumetric Analysis
The gas that is used for the treatment of cancer is
A
Neon
B
Radon
C
Xenon
D
Argon
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 #44617)
Chemistry
UTME / JAMB 2016
Chemical Energetics & Thermochemistry
Solution
A chemical reaction in which the hydration energy is greater than the lattice energy is referred to as
A
A reversible reaction
B
A spontenous reaction
C
An endothermic reaction
D
An exothermic reaction
medium Difficulty
Verified Correct Answer: Option D
Chemical Principles & Mechanism
In salts for which the hydration energy is higher than the lattice energy, solvation occurs with a release of energy in the form of heat. A reaction in which there is a release of energy as LIGHT OR HEAT is EXOTHERMIC.
Source: Myschool Past Questions Archive (Record #44620)
Chemistry
UTME / JAMB 2016
Stoichiometry, Mole Concept & Volumetric Analysis
MnO\(_4\)(aq) + Y + 5Fe\(^{2+}\) (aq) \(\mapsto\) Mn\(^{2+}\) (aq) + 5Fe\(^{3+}\) (aq) + 4H\(_2\)O (l).
In the equation above, Y is
A
10H+ (aq)
B
5H+ (aq)
C
8H+ (aq)
D
4H+ (aq)
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 #44624)