Leaderboard: CHEMISTRY JAMB CBT
| Pos. | Name | Entered on | Points | Result |
|---|---|---|---|---|
| Table is loading | ||||
| No data available | ||||
CHEMISTRY JAMB CBT
Quiz-summary
0 of 74 questions completed
Questions:
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
- 25
- 26
- 27
- 28
- 29
- 30
- 31
- 32
- 33
- 34
- 35
- 36
- 37
- 38
- 39
- 40
- 41
- 42
- 43
- 44
- 45
- 46
- 47
- 48
- 49
- 50
- 51
- 52
- 53
- 54
- 55
- 56
- 57
- 58
- 59
- 60
- 61
- 62
- 63
- 64
- 65
- 66
- 67
- 68
- 69
- 70
- 71
- 72
- 73
- 74
Information
BIOLOGY JAMB CBT
1-50 QUESTIONS
“right” or “false” will be displayed at the end of the quiz.
GOODLUCK
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading...
You must sign in or sign up to start the quiz.
You have to finish following quiz, to start this quiz:
Results
0 of 74 questions answered correctly
Your time:
Time has elapsed
You have reached 0 of 0 points, (0)
Categories
- Not categorized 0%
- JAMB 0%
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
- 25
- 26
- 27
- 28
- 29
- 30
- 31
- 32
- 33
- 34
- 35
- 36
- 37
- 38
- 39
- 40
- 41
- 42
- 43
- 44
- 45
- 46
- 47
- 48
- 49
- 50
- 51
- 52
- 53
- 54
- 55
- 56
- 57
- 58
- 59
- 60
- 61
- 62
- 63
- 64
- 65
- 66
- 67
- 68
- 69
- 70
- 71
- 72
- 73
- 74
- Answered
- Review
-
Question 1 of 74
1. Question
Correct
Incorrect
Hint
Nicotine is a substance in cigarette which makes
difficult to make one stop smoking. This can be
derived by burning. Options B,C,D will not reduce
this nicotine -
Question 2 of 74
2. Question
Correct
Incorrect
Hint
Crystallization is required the most in industries
where the purity of their products is important e.g in
the manufacture of drugs and in sugar production.
Options B,C and D do not undergo crystallization -
Question 3 of 74
3. Question
Correct
Incorrect
Hint
Iron is galvanized with zinc covering to protect it
against corrosion. Option A, B, D are the main
reasons iron is galvanized -
Question 4 of 74
4. Question
Correct
Incorrect
Hint
Washing under pressure is an action in the industrial
production of H. Options B,C,D will not yield Co
and H -
Question 5 of 74
5. Question
Correct
Incorrect
Hint
Washing under pressure is an action in the industrial
production of H. Options B,C,D will not yield Co
and H -
Question 6 of 74
6. Question
The gas that is most useful in protecting humans
against solar marathon isPlease like our facebook page here
Correct
Incorrect
Hint
The ozone layer or ozone shield refers to a region of
Earth’s stratosphere that absorbs most of the Sun’s
ultraviolet (UV) radiation. It contains high
concentrations of ozone (O3) relative to other parts of
the atmosphere, although still very small relative to
other gases in the stratosphere -
Question 7 of 74
7. Question
Correct
Incorrect
Hint
Vulcanizer is the removal of double bend in a
chemical reaction. Option A,B,D can not be removed
by vulcanizer -
Question 8 of 74
8. Question
Correct
Incorrect
Hint
HeSO4
is the acid used in the electrolysis of water.
Option A,B,D are concentrated acid and they will
react with the water -
Question 9 of 74
9. Question
When salt loses its water of crystallization to the
atmosphere on exposure, the process is said to bePlease like our facebook page here
Correct
Incorrect
Hint
Efflorescence is a process of long exposure to the
atmosphere which favors salt loss of water. Options
B, C, D are not related to loss of water -
Question 10 of 74
10. Question
Correct
Incorrect
Hint
Ozone means Oz as the atomicity is 3. Option A,B,D
cannot give ozone because their atomicity is not 3 -
Question 11 of 74
11. Question
Correct
Incorrect
Hint
Helium has the greatest ionization energy because
they are less stable. Options B,C,D have low
ionization energy because one more stable and do not
react easily -
Question 12 of 74
12. Question
The weakest attractive force that can be observed
between two molecules isPlease like our facebook page here
Correct
Incorrect
Hint
Vander Waals are the weakest attractive forces that
exist between two molecules. Option A,B,C are not
weak forces because the force attraction that exist
between their interested molecule are very strong -
Question 13 of 74
13. Question
Correct
Incorrect
Hint
Sulphur is an element that burns with a strongly
explosive smell, as a result it is explosive smell -
Question 14 of 74
14. Question
Cathode rays cause an object placed behind a
perforated anode to cast a shadow on the screen. This
observation shows that the raysPlease like our facebook page here
Correct
Incorrect
Hint
Rays travels in straight lines and finds its way
through any opening available. It could be refracted,
reflected or transmitted based on any obstacle.
Option A,B,C are not the reason why the cathode are
coasted shadows -
Question 15 of 74
15. Question
Correct
Incorrect
-
Question 16 of 74
16. Question
A suitable reagent for distinguish between
ethanoic and ethanol isPlease like our facebook page here
Correct
Incorrect
Hint
Sodium hydrogen trionocarbonate iv is the only
distinguishing reagent between ethanoic and ethanol.
Option A, B, D are not conspicuous in distinguishing
between ethanoic and ethanol -
Question 17 of 74
17. Question
Correct
Incorrect
Hint
Discharge tube with central cathode is an apparatus
for producing cathode rays and positive rays. Option
A,B,C will not yield cathode rays and positive rays -
Question 18 of 74
18. Question
Correct
Incorrect
Hint
Calcium is the only metal that burn with brick red
flame. Option A,C,D will not burn with brick red
flame rather burn with brick blue flame -
Question 19 of 74
19. Question
In the production of soap, concentrated sodium
chloride solution is added toPlease like our facebook page here
Correct
Incorrect
Hint
Concentrated sodium chloride solution will the
solubility of soap along the course of soap
production. Options A,C,D are not appropriate -
Question 20 of 74
20. Question
Correct
Incorrect
Hint
Kerosene is only liquid that will dissolve fat. Option
A,B,D will not dissolve fat because of their chemical
composition -
Question 21 of 74
21. Question
Correct
Incorrect
Hint
A is the correct answer. Tartaric acid is found in
cream of tartar, which is used in cooking candies and
frostings for cakes. Tartaric acid is also found in
baking powder, where it serves as the source of acid
that reacts with sodium bicarbonate (baking soda) -
Question 22 of 74
22. Question
Correct
Incorrect
Hint
V = 1/P
cross multiply
K = VP
V1P1 = V2V2
For a fixed amount of an ideal gas kept at a fixed
temperature, pressure and volume are inversely
proportional. Or Boyle’s law is a gas law, stating that
the pressure and volume of a gas have an inverse
relationship, when temperature is held constant.
The equations supports only Boyle’s law. Option
A,C,D are not in support of the equation… -
Question 23 of 74
23. Question
A fixed mass of gas a volume of 92cm3
at 3°C.
When will be its volume at 18C if the pressure
remains constant?Please like our facebook page here
Correct
Incorrect
Hint
V1 ÷ T1 = V2 ÷ T2
T1 = 3 × 273 = 276k
T2 = 18 + 273 = 291k
V1 = 92cm3
V2 = ?
V2 = (V1T2) ÷ T1 = (92 × 291) ÷ 276
= 97.0cm3 -
Question 24 of 74
24. Question
Which of the following ion’s requires the
quantity of electricity for discharge at an electrodePlease like our facebook page here
Correct
Incorrect
Hint
2.0 mole of Q3+ ions require the largest quantity of
electricity for discharge at an electric. option B,C,D
are all carrying a smaller quantity of electricity which
not be proven for ant discharge -
Question 25 of 74
25. Question
Correct
Incorrect
Hint
Fe displaces hydrogen from hot alkaline solution.
Options B,C,d will not displace hydrogen -
Question 26 of 74
26. Question
Which of the following types of alkanols
undergo oxidation to produce alkanoic acids.
I. Primary alkanols
II. Secondary alkanols
III. Tertiary alkanolsPlease like our facebook page here
Correct
Incorrect
Hint
Only primary alkanols undergo oxidation to produce
alkanoic acid. Option A,B,C will not produce
alkanoic acid -
Question 27 of 74
27. Question
Correct
Incorrect
Hint
Rare gases are stable because they have duplet or
octet electronic configurations in the outermost shells
in their atoms, as a result they don’t go into solution
easily. option A, B, Dare not because they go into
solution easily (unstable) -
Question 28 of 74
28. Question
Correct
Incorrect
Hint
Coal is a major senses of oxide of nitrogen. Option
B,C, D do not contribute to the anode Nitrogen
either. They are sources of oxides of carbon of
sulphur etc -
Question 29 of 74
29. Question
Correct
Incorrect
-
Question 30 of 74
30. Question
The leachate of a certain ash is used in local soap
because it containPlease like our facebook page here
Correct
Incorrect
-
Question 31 of 74
31. Question
Correct
Incorrect
-
Question 32 of 74
32. Question
Correct
Incorrect
Hint
The oxidation number is from h to O as a result of
release of sulphur. Option B, C, D are not the actual
oxidation number for copper -
Question 33 of 74
33. Question
Correct
Incorrect
Hint
The number of isomers C6H14 cm is 5. it will not
form options A,C, D -
Question 34 of 74
34. Question
There are basic particles from which matter
called be made exceptPlease like our facebook page here
Correct
Incorrect
Hint
Salt is a chemical used for varieties of purposes, so
it’s not part of matter, Atom being the smallest part of
molecule and ion are charge which are part of matter -
Question 35 of 74
35. Question
Correct
Incorrect
Hint
Fractionating column contains petrol with different
densities. -
Question 36 of 74
36. Question
What volume of 0.5mldm3 H2SO4 will exactly neutralize 20cm3Â of 0.1moldm3 NaOH Solution?
Please like our facebook page here
Correct
Incorrect
Hint
2NaOH + H2SO4 → Na2SO4 + 2H2O
CaVa) ÷ (CbVb) = ratio of acid / ratio of base
0.5Va ÷ (0.1 × 20) = ½
Va = 2.0cm3 -
Question 37 of 74
37. Question
A compound contains 40.0% carbon, 6.7%
hydrogen and 53.3% oxygen. If the molar mass of the
compound is 180, Find the molecular formula [H = 1, C = 12, O = 16)Please like our facebook page here
Correct
Incorrect
Hint
C = 40%, 40/12 = 3.33
H = 6.7%, 6.7/1 = 6.7
O = 53.3%, 53.3/16 = 3.33
C = 3.33/3.33 = 1
H = 6.7/3.33 = 2
O = 3.33/3.33 = 1
(CH2O)n = 180
(12 + 2 + 16)n = 180
30n = 180
n = 6
= C6H12O6 -
Question 38 of 74
38. Question
Correct
Incorrect
Hint
The oxidation state of K2Cr2O7 is +6. option A,C,D
are the oxidation state of other elements like O7,C14,
etc. -
Question 39 of 74
39. Question
The elements that belong to the third period of
periodic table arePlease like our facebook page here
Correct
Incorrect
Hint
Na, Mg, s and Ar one elements that belong to third
period of the periodic table. Option A,B,C belong to
the other period in the periodic table, second period -
Question 40 of 74
40. Question
Correct
Incorrect
Hint
No entropy change because the sugar will not change
the chemical equivalent of the tea. Options A,B,D are
not appropriate because they will change the
chemical combination of the tea -
Question 41 of 74
41. Question
NH3(g) + HCl(s) → NH 4Cl (s)
The entropy change in the system above is
Please like our facebook page here
Correct
Incorrect
Hint
Entropy s is a measure of the degree of disorder or
randomness of a substance. The entropy charge in the
system is negative. Options B, C, D will not give
negative but the result into positive -
Question 42 of 74
42. Question
Detergents are manufacture with strength
hydrocarbon chains is to make themPlease like our facebook page here
Correct
Incorrect
Hint
Biodegradable because the straight hydrocarbons are
natural and slightly soluble in water. Options A,C,D
do not have strength hydrocarbon chains and they
could harm the environment if they are made with the
detergent -
Question 43 of 74
43. Question
Correct
Incorrect
Hint
Oxide of sulphur is formed as a result of acid rain.
Options A,B, D are not formed as a result of the
pressure of acid -
Question 44 of 74
44. Question
Correct
Incorrect
Hint
Calcium hydrogen trionocarbonate (iv) will cause the
forming of kettles whenever water is present. Options
A, C, D will not react under the presence of water -
Question 45 of 74
45. Question
A difference between chemical and physical
change is that in a chemical changePlease like our facebook page here
Correct
Incorrect
Hint
In chemical change a new substance is formed while
in physical change no new substance is formed.
Options A,B,C are all properties of a physical change -
Question 46 of 74
46. Question
According to the kinetic theory an absence in
temperature causes the kinetic energy of particles toPlease like our facebook page here
Correct
Incorrect
-
Question 47 of 74
47. Question
PCL5(g)= PCL3(g) + Cl2(g)
In the reaction above, a decrease in pressure will
Please like our facebook page here
Correct
Incorrect
-
Question 48 of 74
48. Question
Which of the following gives a precipitation
when treated with NaOH Solution?Please like our facebook page here
Correct
Incorrect
Hint
AlCl3
will give a precipitate when treated with
solution. Option B,C,D will not give a precipitate
when treated with NaOH solution -
Question 49 of 74
49. Question
Correct
Incorrect
Hint
Alloy is a metal that consist of two or more metals
mixed together e.g. is mass which is an alloy of
copper and zinc. Are not prepared with option A,B,C,
and the do not result in mixture and metals together -
Question 50 of 74
50. Question
In countries where the temperature fall below
273k, salt always spilled on the ray road in order toPlease like our facebook page here
Correct
Incorrect
Hint
Salt is good chemical agent that lowers the melting of
an ice only it temperature below 0°C options B,C,D
will not have the melting point except is above the 0°
C. only salt does that. -
Question 51 of 74
51. Question
What is the volume of energy required to burn
45cm3 of mixture at S.T.PPlease like our facebook page here
Correct
Incorrect
Hint
CH4(g)
+ 2O2(g)
→ 2H2O(g)
1 volume of methane will react with 90cm3
of
oxygen at S.T.P -
Question 52 of 74
52. Question
The substance that is used in the steel industry
for the removal of carbon. Sulphur and phosphorus
impurities from pig iron isPlease like our facebook page here
Correct
Incorrect
Hint
Oxygen is a substance that is used to remove
impurities from pig iron. Options B, C, D will be
effective in removing impurities positive] -
Question 53 of 74
53. Question
If glucose is heated on the concentration
tetraoxosulphate(iv)acid, it will be dehydratedPlease like our facebook page here
Correct
Incorrect
Hint
Carbon concentration of 4 will not give a precipitate
heating. Option B,C,D will not be dehydrated -
Question 54 of 74
54. Question
Correct
Incorrect
Hint
Rare gases are stable because they have duplet or
octet electronic configurations in the outermost shells
in their atoms, as a result they don’t go into solution
easily. option A, B, Dare not because they go into
solution easily (unstable) -
Question 55 of 74
55. Question
Which of the following compounds can be
represented by the molecular formula C2 H6O?Please like our facebook page here
Correct
Incorrect
Hint
Ethanol has the molecular formula C2H6O. Option
A, C, D are not because their molecular are not
different -
Question 56 of 74
56. Question
Two equal bulbs, one containing ammonia and
the other one opened mouth-to mouth to each other at
temperature the entropy in the mixture of gases is
likely toPlease like our facebook page here
Correct
Incorrect
Hint
The bubble remain the same because entropy favors
the mixture as it is the degree of randomness or
disorderliness. Option B,C,D will not favors the
entropy -
Question 57 of 74
57. Question
Correct
Incorrect
Hint
[H+][OH−] = 10 − 4
[H+] =10 − 14 ÷ [OH+]
=10 −14 ÷ (1 × 10 − 3) = 10 − 11
pH = − log10[H+ ]
= − log10[10 − 11] = − 1 × −11
log10[10 − 11] = 1
= − 1 × 11 × 1
= − 11 -
Question 58 of 74
58. Question
According to the kinetic theory an absence in
temperature causes the kinetic energy of particles toPlease like our facebook page here
Correct
Incorrect
-
Question 59 of 74
59. Question
N2O4(g)→ 2NO2(g)
In the endothermic reaction above, more products
formed will be favored byPlease like our facebook page here
Correct
Incorrect
Hint
A decrease in pressure will result in the breaking or
splitting of a larger molecule into a simpler ones.
Options A, B, D are not in conformance to the -
Question 60 of 74
60. Question
Correct
Incorrect
Hint
Chlorine turns a damp starch iodide paper into dark
blue or blue black. -
Question 61 of 74
61. Question
Chlorine consisting of two isotope of mass
number 35 and 37 in the ratio 3:1 has an atomic mass
of 35.5. Calculate the relative abundance of the
isotope of mass number 37Please like our facebook page here
Correct
Incorrect
Hint
Let the relative abundance of the energy with mass
37 be
Total relative abundance of the isotope of mass
359100-k)
Total mass of isotope of mass 37-37x, while that of
35-359(100x)
-37x + 3500 − 35 − 35.5
-37x + 3500 − 35n − 35.5
Mean mass of chlorine atom − (2n + 3500)/ ÷ 100
= 35.5
2x + 3500 − 3550yx = 50/2 -
Question 62 of 74
62. Question
Correct
Incorrect
Hint
Methane CH4.A. is the principal and commercial
constituent natural gas. Option B,C,D are also
constituent of natural gas but they are not commercial
and of economic importance -
Question 63 of 74
63. Question
One note of a hydrocarbon 36g of carbon and its
density is 20. The structure of hydrocarbon is
(organic chemical)Please like our facebook page here
Correct
Incorrect
Hint
2VD = Rmm
VD = Vapour Density, Rmm = relative
2 × 20 − 40 molecular mass
Mole of carbon − 36/12
= 3
Mole of H2 = 40 − 36
= 4
The compound contains 3mole of carbon and 4
hydrogen -
Question 64 of 74
64. Question
In the electrolysis of CuSo4(g)
using platinum
electrode the reaction at the anode isPlease like our facebook page here
Correct
Incorrect
Hint
40H − 4e → 2H2O + O2is the reaction of sun at the
anode in the electrolysis of CuSO4 (g) using
platinum particles. Option A,C,D are not formed as a
result of the equation -
Question 65 of 74
65. Question
Correct
Incorrect
-
Question 66 of 74
66. Question
Correct
Incorrect
Hint
In SO4. The state of oxygen oxidation number is -2.
Options A,C,D do not belong to the oxidation state in
SO4 -
Question 67 of 74
67. Question
Correct
Incorrect
Hint
In the industrial of brine carbon is the anode while
mercury is the cathode. Options of A, B, C are not
used in brine solution because they are alloy of
mercury -
Question 68 of 74
68. Question
Calculate the relative molecular mass of
Limestone CaCO3, (Ca = 40, C =12, O = 16)Please like our facebook page here
Correct
Incorrect
Hint
One molecule of CaCO has 1Ca, 1C and 30 atom
relative molecular mass of CaCO3
1 × Ar of Ca +1 × Ar of C +3 × Ar of O
(1 × 40 + 1 × 12 + 3 × 1)
40 + 12 + 48
=100
Option A,C and D will not give 100 -
Question 69 of 74
69. Question
When stem is passed over red hot carbon the
substances produced arePlease like our facebook page here
Correct
Incorrect
Hint
Hydrogen and carbon (ii) oxide will be formed when
red steam is passed ever red-hot carbon. Option
A,B,D are not produced through this process -
Question 70 of 74
70. Question
A machine which enables sales without the
physical presence of sales attendant is aPlease like our facebook page here
Correct
Incorrect
Hint
the vending machine is a retails machine that release
the product to the tune of the amount of money
slotted into the machine and the product indicated by
the consumer. -
Question 71 of 74
71. Question
In a typical manufacturing enterprises, the line
function is performed by thePlease like our facebook page here
Correct
Incorrect
Hint
the marketing department does public relations i.e the
public relations department is part of the marketing
department -
Question 72 of 74
72. Question
The body regulating the sale and purchase of
shares in Nigeria is thePlease like our facebook page here
Correct
Incorrect
Hint
the securities and exchange commission is the
regulatory apex organization of the Nigerian capital
market. -
Question 73 of 74
73. Question
Correct
Incorrect
Hint
it is joint stock Company that prepare memorandum
of association during the course of registering the
company it is also known as Limited Liability
Company. -
Question 74 of 74
74. Question
An agent who takes title to goods and has
authority to buy and sell on behalf of another isPlease like our facebook page here
Correct
Incorrect
Hint
As a jobber takes title to the goods and has authority
to buy and sell or behalf of another
We work hard to provide questions give us like on facebook 
