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Chemistry UTME / JAMB 1990 Stoichiometry, Mole Concept & Volumetric Analysis
To make coloured glasses, small quantities of oxides of metals which form coloured silicates are often added to the reaction mixture consisting of Na2CO3 and SiO2. Such a metals is a?.
A
pottasium
B
barium
C
zinc
D
copper
medium Difficulty
Chemistry UTME / JAMB 1990 Nature of Matter & Separation Techniques
Which of the following compounds gives a yellow residue when heated and also reacts with aqueous sodium hydroxide to give a white gelatinous precipitate soluble in excess sodium hydroxide solution?
A
(NH4)CO3
B
ZnCO3
C
Al2(SO4)3
D
PbCO3
medium Difficulty
Chemistry UTME / JAMB 1990 Organic Chemistry I: Hydrocarbons & Crude Oil
A cycloalkane with the molecular formula C5H10 has ?
A
one isomer
B
two isomers
C
three isomers
D
four isomers
medium Difficulty
Chemistry UTME / JAMB 1990 Organic Chemistry II: Functional Groups, Polymers & Biomolecules
The label on a reagent bottle containing a clear organic liquid dropped off.The liquid was neutral to litmus and gave a colourless gas with metallic sodium. The liquid must be an?
A
alkanoate
B
alkaene
C
alkanol
D
alkane
medium Difficulty
Chemistry UTME / JAMB 1990 Organic Chemistry II: Functional Groups, Polymers & Biomolecules
Alkaonic acids have low volatility compared with alkanols because they?
A
are more polar than alkaonls
B
have two oxygen atoms while alkanols have one
C
form hydrogen bonds while alkanols do not
D
form two hydrogen bonds while alkanols form one
medium Difficulty
Chemistry UTME / JAMB 1990 Organic Chemistry I: Hydrocarbons & Crude Oil
The octane number of a fuel whose performance is the same as that of a mixture of 55 g of 2,2,4- trimethly pentane and 45 g of n-heptane is ?
A
45
B
55
C
80
D
100
medium Difficulty
Chemistry UTME / JAMB 1990 Non-Metals & Their Compounds
Which of the following is formed when maltose reacts with concentrated tetraoxosulphate (VI) acid ?
A
Carbon (IV) oxide
B
Coal tar
C
Charcoal
D
Toxic fumes
medium Difficulty
Chemistry UTME / JAMB 1990 Atomic Structure, Orbitals & Nuclear Chemistry
If a gas occupies a container of volume 146 cm3 at 18^\circC and 0.971 atm, its volume in cm3 at s.t.p is?
A
133
B
146
C
266
D
292
medium Difficulty
Chemistry UTME / JAMB 1990 Kinetic Theory of Matter & Gas Laws
The volume occupies by 1.58g of a gas at s.t.p is 500cm3. What is the relative molecular mass of the gas? (G.M.V at s.t.p = 22.40dm3)
A
28
B
32
C
44
D
71
medium Difficulty
Chemistry UTME / JAMB 1990 Kinetic Theory of Matter & Gas Laws
Equal volumes of CO,SO2, NO2 and H2S were released into a room at the same point and time. Which of the following gives the order of diffusion of the gases to the opposite corner of the room? (S = 32, C = 12, O = 16, N = 14, H = 1)
A
CO, SO2,NO2,H2S
B
SO2,NO2,H2S,CO
C
CO,H2S,SO2,NO2
D
CO,H2S,NO2,SO2
medium Difficulty
Chemistry UTME / JAMB 1990 Kinetic Theory of Matter & Gas Laws
A basic postulate of the kinetic theory of gases is that the molecules of a gas move in straight lines between collisions. This implies that?
A
collisions are perfectly elastic
B
forces of repulsion exist
C
forces of repulsion are in equilibrium
D
collision are inelastic
medium Difficulty
Chemistry UTME / JAMB 1990 Atomic Structure, Orbitals & Nuclear Chemistry
.....................P....Q.....R......S Proton..............13....16....17.....19 Electron............13....16....17.....19 Neutron.............14....16....35.....20 Which of the four atoms P,q,R and in S in the above data can be described by the following properties relative atomic mass is greater than 30 but less than 40; it has an odd atomic number and forms a unipositive ion in solution?
A
P
B
Q
C
R
D
S
medium Difficulty
Chemistry UTME / JAMB 1990 Periodic Table & Periodicity
Which of the following terms indicates the number of bonds that can be formed by an atom?
A
Oxidation number
B
Valence
C
Atomic number
D
Electronegativity
medium Difficulty
Chemistry UTME / JAMB 1990 Periodic Table & Periodicity
X(g) → X\(^-\)(g). The type of energy involved in the above transformation is?
A
ionization energy
B
sublimation energy
C
lattice energy
D
electron affinity
medium Difficulty
Chemistry UTME / JAMB 1990 Atomic Structure, Orbitals & Nuclear Chemistry
Chlorine, consisting of two isotopes of mass numbers 35 and 37, has an atomic mass of 35.5. The relative abundance of the isotope of mass number 37 is?
A
20
B
25
C
50
D
75
medium Difficulty
Page 1695 of 1989