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Topic: Jamb CBT 18 May 2017 (Day 5) Answers Posted For Free
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Posted by At 6:26 am On May 18, 2017

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Biology..

1 :- an example of an arboreal mammals Is
CORRECT ANSWER =
bat
2 :- the cusative organism of polio myelitis is
infact is
CORRECT ANSWER =
virus
3 :- in humans sex is determined by
CORRECT ANSWER =
the difference in the nature of the X and Y
chromosomes in the male
4 :- the mode of transmission of small pox is
CORRECT ANSWER =
airborne only
5 :- the theory of natural selection was
postulated by
CORRECT ANSWER =
Darwin
6 :- the structure that gives rise to secondary
thickening in plants is
CORRECT ANSWER =
cambium
7 :- a condition that is not necessary for
germination of seed is
CORRECT ANSWER =
pressure
8 :- a dry dehiscent fruiy that has two
structures in the pericap Is called a
CORRECT ANSWER =
legume
9 :- on contact with a glowing splint the gas In
will
CORRECT ANSWER =
ignite the splint
10 :- which of the following processes does not
contribute to the maintainance of the nitrogen
content of
the soil
CORRECT ANSWER =
dentriendosperm
11 :- in which of the following vertebrates does
the skin function as a respiratory surface ?
CORRECT ANSWER =
frog
12 :- the possesion of scales laying of eggs
with shells and bony structure of the head are
characteristic
feature shared by
CORRECT ANSWER =
birds and reptiles
13 :- the deficiency of vitamin D in the diet of
humans can result to
CORRECT ANSWER =
rickets
14 :- most of the trees of the rain forest have
slender straight trunks and branched near the
top this is
CORRECT ANSWER =
to ensure that their leaves get enough sunlight
15 :- the sum total of the genes that an
offspring inherits from its parents is known as
CORRECT ANSWER =
genotypes
16 :- the biological factor that is unique to
each other is the
CORRECT ANSWER =
DNA
17 :- the modification in structure physiology
and behaviour of plant and animal is called
CORRECT ANSWER =
adaptation
18 :- the body that connetcs the left and right
hemisphere of the forebrain is
CORRECT ANSWER =
corpus callosum
19 :- tugor pressure occurs in a cell wen the
CORRECT ANSWER =
volume of its cell sap increase
20 :- the part labelled II is the
CORRECT ANSWER =
endosperm
21 :- the function of the long-winged
reproductive in a termite colony is
CORRECT ANSWER =
dispress the population
22 :- an example of coelenterates is
CORRECT ANSWER =
Hydra
23 :- according to Darwin the driving force
behind evolutionary change is
CORRECT ANSWER =
natural selection
24 :- a characteristic of vertebrates that Is
found only in mammals is
CORRECT ANSWER =
exhibition of parental care
25 :- the function of the part labelled I is to
CORRECT ANSWER =
serves as a bait
26 :- the primary function of the root hair is
CORRECT ANSWER =
absorption
27 :- the vertebra that permits the nodding
movement of the head is
CORRECT ANSWER =
Atlas
28 :- the centre for controlling body
temperature in the brain is the
CORRECT ANSWER =
Hypothalamus
29 :- the mode of nutrition in the organism
above is
CORRECT ANSWER =
holozoic
30 :- the relative amount of the different soil
particles can best be determined by the
process of
CORRECT ANSWER =
sedimentation
31 :- the deficiency disease that results from
lack of vitamin B is
CORRECT ANSWER =
beri-beri
32 :- which of the following are biotic factors
of an ecosystem ?
CORRECT ANSWER =
bacteria and nematodes
33 :- In mammalian males the structure that
stores sperm is the
CORRECT ANSWER =
epididymis
34 :- hygrometer is the instrument for
measuring
CORRECT ANSWER =
relative humidity
35 :- the sudden change in a gene or
chromosome that can be passed on to the
offspring is
CORRECT ANSWER =
mutation
36 :- which of the following is not a biotic
factor
CORRECT ANSWER =
edaphic
37 :- the experimental set up above is to verify
CORRECT ANSWER =
the production of oxygen during photosynthesis
38 :- the structure in a cell responsible for the
synthesis of protein is the
CORRECT ANSWER =
ribosome
39 :- the process of mating a male donkey and
a female horse to give a mule is known as
CORRECT ANSWER =
cross breeding
40 :- an example of insects that undergoes
complete metamorphosis is
CORRECT ANSWER =
butterfly

CHM THURS 7am
1 :- the setup above indicates the laboratory preparation of
CORRECT ANSWER =
oxygen
2 :- what is the atomic number of an elemnt having 127 neutrons and electrons
CORRECT ANSWER =
3 :- from the equation above,the volume of oxygen required to oxidize 24g of copper(II) sulphide is
CORRECT ANSWER =
5.6dm3
4 :- the color of phenolpthalin in an alkaline medium is
CORRECT ANSWER =
pink
5 :- which of the following hydrocarbon has the least boiling point
CORRECT ANSWER =
butane
6 :- the form of carbon used as an absorbent is
CORRECT ANSWER =
soot
7 :- the shape of hydrogen moelcule is
CORRECT ANSWER =
linear
8 :- the process were solid change to gas is known as
CORRECT ANSWER =
sublimation
9 :- In the diagram above for a homogenous gaseous reaction,curve Y would be produced when there is
CORRECT ANSWER =
addition of a catalyst
10 :- which of the following is correct about the atomic volume of an element
CORRECT ANSWER =
it decreases across the periods in the periodic table
11 :- when candle wax is ignited ,it
CORRECT ANSWER =
melts vaporizes and decomposes
12 :- duralumin can be used as
CORRECT ANSWER =
aircrafts and ships
13 :- in duralumin, the element with highest percentage by composition is
CORRECT ANSWER =
AL
14 :- the reaction of calcium carbide with cold water will produce calcium hydroxide and
CORRECT ANSWER =
ethyne
15 :- an increase in temperature will cause the solubility of a gas to
CORRECT ANSWER =
increase
16 :- which of the following chemical formula can exhibit isomerism
CORRECT ANSWER =
16
17 :- the nature eof bond formed between the structure above and oxygen is
CORRECT ANSWER =
covalent
18 :- the iupac nomenclature of CH2=CHC=CH is
CORRECT ANSWER =
but-1-ene-3-yne
19 :- the alloy used in making medals is
CORRECT ANSWER =
permallory
20 :- water becomes hard when it dissolves
CORRECT ANSWER =
calcium carbonate(IV)
21 :- CH2=CH2 is a monomer of
CORRECT ANSWER =
polyehylene
22 :- when lubricating oil is distilled , it yields
CORRECT ANSWER =
petroleum jelly
23 :- which of the following is the most siutable
CORRECT ANSWER =
ethanoic acid
24 :- nitrogen is used as a carrier gas in gas chromatography due to its
CORRECT ANSWER =
appearance
25 :- a gas occupies 12.0dm3 at 7atm and 25C. Calculate the amount present in moles
CORRECT ANSWER =
3.44
26 :- which of the following occurs when a solution of potassium hydroxide is added by drop to and aqeous solution of trioxonitrate(V)acid in a beaker?
CORRECT ANSWER =
the pH of the solution decreases
27 :- the dissolution of sugar in water leads to
CORRECT ANSWER =
decrease in enthalpy
28 :- which of the following chlorides is prepared by neutralizing their hydroxides with dilute hydrochloric acid?
CORRECT ANSWER =
Nacl
29 :- complete combustion of methane in air produces water and
CORRECT ANSWER =
carbon(IV)oxide
30 :- the salt with the lowest solubility is
CORRECT ANSWER =
Ca(OH)2
31 :- 20cm3 of sodium hydroxide 18cm3 of 0.01 mol/dm3 H2SO4 for complete neutralizatiuon. Calculate te concentration of he base in mol/dm3
CORRECT ANSWER =
0.018
32 :- which of the following enables the functioning of an electrochemical cell
CORRECT ANSWER =
a salt bridge
33 :- in an exothermic reaction, an increase in temperature will make the value of K to
CORRECT ANSWER =
decrease
34 :- what quantity of elctricity is produced when a current of 0.5A is passed for 345mins
CORRECT ANSWER =
0.107F
35 :- dehydration of alkanol will give
CORRECT ANSWER =
ethene
36 :- complete combustion of candle wax produces water and
CORRECT ANSWER =
carbon(IV)oxide
37 :- from the reaction above the reverse process is not feasible because
CORRECT ANSWER =
copper cannot displace hydrogen from water
38 :- a mixture of water and ethanol can be seperated using
CORRECT ANSWER =
distillation
39 :- the macromolecule found in cotton wool is
CORRECT ANSWER =
cellulose
40 :- the element that can be extracted as a free element is
CORRECT ANSWER =
AV

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