1992 - JAMB Chemistry Past Questions and Answers - page 5
41
Which of the following are isomers?
A
Ethanol and dimethyl ether
B
Benzene and methybenzene
C
Ethanol and propanone
D
Trichloromethane and tetrachloromethane
correct option: a
Users' Answers & Comments42
The functional group present in an organic compound which gives bubbles on treatment with a saturated solution of NaHCO3 is?
A
hydroxyl group
B
carboalkoxyl group
C
carbonyl group
D
carboxyl group
correct option: d
Users' Answers & Comments43
An organic compound containing 40.1% carbon and 6.6% hydrogen has an empirical formula of?
A
C2H4O2
B
C2H3O2
C
CH2O
D
CH3O
correct option: c
Carbon Hydrogen
40.1..........................6.67
(3.342) / (3.342).............(6.67) / (3.342)
1 1.9958
1 Ω 2
CH2O
Users' Answers & Comments40.1..........................6.67
(3.342) / (3.342).............(6.67) / (3.342)
1 1.9958
1 Ω 2
CH2O
44
The characteristics reaction of carbonyl compounds is?
A
substitution
B
elimination
C
addition
D
saponfication
correct option: c
Users' Answers & Comments45
Alkanals can be differentiated from alkanones by reaction with?
A
2,4-dinitrophenylhydrazine
B
hydrogen cyanide
C
sodium hydrogen sulphite
D
Tollen's reagent
correct option: d
Users' Answers & Comments46
An example of a polysaccharides is?
A
—dextrose
B
mannose
C
glucose
D
starch
correct option: d
Users' Answers & Comments47
A
a solution of sodium dioxonitrate (lll) and ammonium chloride
B
a solution of lead trioxnitrate (V)
C
a solution of sodium trioxonitrate (V) and ammonium chloride
D
concentrated tetraoxosulphate (VI) acid and sodium trioxonitrate (V)
correct option: c
Users' Answers & Comments48
A
A
B
B
C
C
D
D
correct option: a
Users' Answers & Comments49
A given mass of gas occupies 2 dm2 at 300k. At what temperature will its volume be doubled keeping the pressure constant?
A
400k
B
480k
C
550k
D
600k
correct option: d
Users' Answers & Comments50
Which of the following is a measure of the average kinetic energy of the molecules of a substance?
A
volume
B
mass
C
pressure
D
temperature
correct option: d
Users' Answers & Comments