2002 - JAMB Chemistry Past Questions and Answers - page 4
31
A red precipitate of copper (I) carbide is formed when ammonium solution of copper (I) chloride is introduced into
A
CH3CH2CH2CH3
B
CH2 = CH - CH2CH3
C
CH3CH2 - C = CH
D
CH3 - C = C - CH3
correct option: c
Users' Answers & Comments32
The boiling of fat and aqueous caustic soda is referred to as
A
hydrolysis
B
esterification
C
acidification
D
saponification
correct option: d
Users' Answers & Comments33
The most important use of hydrogen is in the
A
manufacture of ammonia
B
manufacture of methyl alcohol
C
manufacture of ethyl alcohol
D
hydrogenation of oils
correct option: a
Users' Answers & Comments34
which of the following polymers is suitable for packaging and electrical insulation?
A
polyamide
B
polyethene
C
polycarbonate
D
polystyrene
correct option: d
Users' Answers & Comments35
Hydrogen is readily released when dilute hydrochloric acid reacts with
A
Cu
B
Na
C
Au
D
Ag
correct option: b
Users' Answers & Comments36
The intermediate product formed when ethanol is progressively oxidized to ethanoic acid with potassium heptaoxodichromate (IV) is
A
butanal
B
ethanal
C
methanal
D
propanal
correct option: b
Users' Answers & Comments37
A rock sample was added to cold dilute HNO3. The gas evolved was passed into a solution of acidified K2Cr2O7 and the solution turned green. The sample contains
A
Cl-
B
NO3-
C
SO32-
D
SO42-
correct option: c
Users' Answers & Comments38
Which of the following statement is true of a proton?
A
The mass of a proton is 1840 times the mass of electron
B
the total mass of the protons in a particular nucleus is always half the nuclear size
C
The mass of a proton is one - twelfth the molar mass of carbon
D
The mass of a proton is 1.0008g
correct option: d
Users' Answers & Comments39
Which of the following chloride would exhibit the least ionic character?
A
MgCl2
B
CaCl2
C
LiCl
D
AlCl3
correct option: d
Users' Answers & Comments40
A fixed mass of gas has a volume of 92cm3 at 3 oC. When will be its volume at 18 oC if the pressure remains constant
A
15.3cm3
B
87.3cm3
C
552.0cm3
D
97.0cm3
correct option: d
(V1/T1) = (V2/T2)
T1 = 3+273 = 276K
∴ (92/276) = (V2/291)
T2 = 18 + 273 = 291K
V2 (92 * 291)/276
= 97.0 cm3
Users' Answers & CommentsT1 = 3+273 = 276K
∴ (92/276) = (V2/291)
T2 = 18 + 273 = 291K
V2 (92 * 291)/276
= 97.0 cm3