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Chemistry UTME / JAMB 1999 Electrolysis & Electrochemical Cells
When a current I was passed through an electrolyte solution for 40 minutes, a mass X g of a univalent metal was deposited at the cathode. What mass of the metal will be deposited when a current 2I is passed through the solution for 10 minutes?
A
X/4 g
B
X/2 g
C
2X g
D
4X g
medium Difficulty
Chemistry UTME / JAMB 1999 Chemical Energetics & Thermochemistry
RS(aq) + HF(aq) → RF(s) + HS(aq) ΔH = -65.7 kj mol(-1). From the equation above, it can be deduced that
A
the heat content of the reactants is lower than that of the products
B
the heat content of the reactants is higher than that of the products
C
the reaction is slow
D
a large amount of heat is absorbed
medium Difficulty
Chemistry UTME / JAMB 1999 Electrolysis & Electrochemical Cells
Which of the following statement is true of the electrochemical series?
A
Electropositivity of metals increase down the series
B
Electropositivity of non-metals decrease down the series
C
Electronegativity of non-metals decrease down the series
D
Electropositivity of metals decreases down the series
medium Difficulty
Chemistry UTME / JAMB 1999 Metals, Transition Elements & Extraction
What properties of duralumin make it more useful than its constituent metals?
A
It is heavy with a high melting point
B
It is malleable and has high density
C
It is strong and light
D
It is hard and ductile
medium Difficulty
Chemistry UTME / JAMB 1999 Electrolysis & Electrochemical Cells
The pair of metals in the reactivity series that are usually extracted by the electrolysis of their ores is
A
magnesium and zinc
B
magnesium and calcium
C
copper and zinc
D
lead and calcium
medium Difficulty
Chemistry UTME / JAMB 1999 Stoichiometry, Mole Concept & Volumetric Analysis
A metal that can be extracted from cassitertite is
A
cacium
B
magnesium
C
tin
D
copper
medium Difficulty
Chemistry UTME / JAMB 1999 Stoichiometry, Mole Concept & Volumetric Analysis
Which of the following metals is passive to concentrated trioxonitrate (V) acid?
A
Iron
B
Tin
C
Copper
D
Zinc
medium Difficulty
Chemistry UTME / JAMB 1999 Stoichiometry, Mole Concept & Volumetric Analysis
The hydrocarbon that burns in air with a sooty flames is
A
C2H6
B
C3H8
C
C4H10
D
C6H6
medium Difficulty
English Language WAEC / WASSCE 1999 Concord (Subject-Verb Agreement)
From the words lettered A to D, choose the word that best completes each of the following sentences. In hazy weather, air travel is ..........
A
harmful
B
foggy
C
misty
D
risky
medium Difficulty
English Language WAEC / WASSCE 1999 Concord (Subject-Verb Agreement)
From the words lettered A to D, choose the word that best completes each of the following sentences. He has since taken over the ..........of power
A
reins
B
rains
C
regins
D
realms
medium Difficulty
English Language WAEC / WASSCE 1999 Concord (Subject-Verb Agreement)
From the words lettered A to D, choose the word that best completes each of the following sentences. The government has promised to ...........the road construction project
A
repair
B
enforce
C
execute
D
fascinate
medium Difficulty
English Language WAEC / WASSCE 1999 Idioms, Figurative Expressions & Sentence Interpretation
After each of the following sentences, a list of possible interpretations of the sentence is given. Choose the interpretation that you consider most appropriate for each sentence. I am sure you didn't known that lady is light-fingered. This means that the lady is
A
careless in handling things
B
fair-skinned
C
prone to stealing
D
skilful with her hands
medium Difficulty
English Language WAEC / WASSCE 1999 Idioms, Figurative Expressions & Sentence Interpretation
After each of the following sentences, a list of possible interpretations of the sentence is given. Choose the interpretation that you consider most appropriate for each sentence. Unfortunately nowadays most young persons do not see eye to eye with their parents over matters of friendship and fashion. This means that parents and their children.
A
can't look one another in the face
B
hold strong view on friendship and fashion
C
have clothes different from their friends
D
hold different views about friendship and fashion
medium Difficulty
Chemistry UTME / JAMB 1999 Organic Chemistry I: Hydrocarbons & Crude Oil
2-methylprop-1-ene is an isomer of
A
but-2-ene
B
pent-1-ene
C
2-methylbut-2-ene
D
2-methylbut-1-ene
medium Difficulty
Chemistry UTME / JAMB 1999 Stoichiometry, Mole Concept & Volumetric Analysis
Which of the following is a solvent for perfumes?
A
C5H12
B
C4H6
C
CH3COOH
D
C2H5OH
medium Difficulty
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