NABTEB GCE AND NECO GCE GEOGRAPHY PRACTICAL ANSWERS
(1)
Tabulate
Titration; | rough | 1 | 2 | 3 |
Final; | 20.50 | 14.00 |14.00 | 14.00 |
Initial; | 0.00 | 0.00 | 0.00 | 0.00 |
Volume of A used; | 20.50 | 14.00 |14.00 | 14.00 |
Volume of pipette used
=25.00cm³
(1a)
Average volume of A used = 14.00+14.00+14.00/3
=14.00cm³ (Va)
2HNO³ + X²CO³ —> 2XNO³ + H²O + CO²
(1bi)
Conc – of B in molldm³ = ?
Given;
Ca= 0.15molldm³
Vb= 25.00cm³
Va= 14.00cm³
Cb= ??
Na= 2
Nb= 1
Using;
CaVa/CbVb=Na/Nb
Cb= CaVaNb/VbNa
Cb= 0.15*14.00*1/25.00*2
Cb= 2.1/50
Cb= 0.042molldm³.
(1bii)
Molar mass of B =?
Using;
Conc(molldm³)= Conc(gldm³)/molar mass
0.042/1 * 4.20/m.m
m.m=4.20/0.042
m.m=100glmol
(1biii)
Value of x in x²(i)³=?
(2x)+12 + (16*3)= 100
2x+12+48=100
2x+60=100
2x=100-60=40
2x/2=40/2
x=20g/mol
(1ci)
(i)I ensure that the readings are taken at the lower meniscus
(ii)I ensure that my saliva did not enter the pipette while taking the base
(1cii)
Pink
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(2)
Tabulate
(2ai)
Under Observation;
An effervescence occurs in which a colorless and odourless gas which burns blue litmus red is evolved.
Under Inference;
CO² gas from CO3^²is suspected
(2aii)
Under Observation;
The gas turns lime water milky.
Under Inference;
CO² gas is confirmed.
(2b)
Under Observation;
Y dissolves completely in water
Under Inference;
Soluble salt
(2bi)
Under Observation;
White gelatinous PPT is formed.
Under Inference;
Al³+, Zn²+, Pb²+, present
(2bii)
Under Observation;
The white gelatinous PPT dissolve in excess NaOH
Under Inference;
Al³+, Zn²+, Pb²+, present
(2biii)
Under Observation;
White gelatinous PPT formed.
Under Inference;
Al³+, Zn²+, Pb²+, present
(2biv)
Under Observation;
The white gelatinous PPT remain insoluble in excess NH³
Under Inference;
Al³+, Pb²+, present.
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(3ai)
It increases the boiling point of water
(3aii)
It requires heat to occur.
(3bi)
This is because it is deliquescent.
(3bii)
- Calcium oxide
- Anhydrous copper(ii) tetraoxosulphate(vi)
(3ci)
Hydrogen Chloride
(3cii)
- To separate a mixture of immiscible liquids
- To collect gases.
(3a)
(i)
The texture of a rock is the size, shape, and arrangement of the grains (for sedimentary rocks) or crystals (for igneous and metamorphic rocks. Example includes: basalt, andesite and rhyolite.
(ii)
The structure of an igneous rock is normally taken to comprise the mutual relationships of mineral or mineral-glass aggregates that have contrasting textures, along with layering, fractures, and other larger-scale features that transect or bound such aggregates.
(iii) Colour: Color index is an indicator of the types of minerals present, and the specific type of rock. The color index of an igneous rock is a measure of the ratio of dark colored, or mafic, minerals to light colored, or felsic, minerals.
(3b)
PLUTONIC ROCKS
– Plutonic rocks are formed when magma cools and solidifies underground.
– It cools at a very slow rate and may take thousands or millions of years to solidify.
VOLCANIC ROCKS
– Volcanic rocks are formed from lava that flows on the surface of the Earth and other planets and then cools and solidifies.
– It doesn’t cool at a very slow rate and it doesn’t take thousands or millions of years to solidify.
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(4a)
(TABULATE)
(UNDER WEATHER)
(i) Weather is the atmospheric over a condition of a place short period (days, weeks, hours, months).
(ii) Weather changes very often.
(iii) Weather cannot be generalized.
(UNDER CLIMATE)
(i) Climate is the average condition of a place over a long period of time (35 years).
(ii) Climate does not change very often.
(iii) Climate can be generalized.
CHOOSE ANY BEST (2) OF YOUR CHOICE
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(7a)
Environmental resources means any useful item in the environment or materials and substances that are useful to man.
(7b)
[PICK ANY FOUR]
(i) Atmospheric resources
(ii) Human resources
(iii) Mineral resources
(iv) Land resources
(v) Vegetation resources.
(7c)
[PICK ANY TWO]
(i) Forest resources such as timber products provide raw materials for the local industries e.g. furniture industry.
(ii) Forest resources provide herbs for pharmaceutical and herbal industries and clinics. They contribute positively to the health of the people.
(iii) Exportation of forest resources provide government with foreign exchange e.g. export of timber.
(iv) It helps various levels of government to generate revenue from taxes imposed on products and firms involved in the exploitation of forest resources.
(v) Grasslands provide food for livestock which serves as food for man.
(vi) Forest resources provide habitation for wild life and also help to promote tourism e.g. Yankari game reserve in Nigeria etc.
TABULATE
=GIS=
(i) It is cost effective and requires less manpower as it is tool-based.
(ii) It requires field study to interpret data into useful information
=REMOTE SENSING=
(i) It is a costly affair as the data is incurred from space and through sensors and satellites.
(ii) It reduces manual work and ground field study.
(8b)
(i) In Telecommunication: Satellite remote sensing have been found to be more useful and relevant in telecommunication. The satellite remote sensing has made it possible for regional, national and international communication without being in direct contact with human beings.
(ii) In Transportation: The availability of high resolution commercial remote sensing has contributed to a revolution to the transport network. The satellite remote sensing is useful to transportation, it helps to improve the trafficability of the roads and also contributed greatly in the movement of aero planes, jets and even seen beyond the bonds of human eye sight.
(8c)
(i) Inadequate Power
(ii) Inadequate Personnel
(iii) Inadequate Personnel
(iv) Inadequate capital.
(1a)
A; hand fork
B; dibber
C; cross staff
D; cast net
E; feeding trough
(1b)
A; it is use for digging up weeds
B; it is use for making holes in the soil
C; it is use to make angel between two objects
D; it is use for catching fish
E; livestock feed are placed in it.
(1c)
Wash rinse and dry after use
(1d)
(i) horn
(ii) swivel
(1e)
(i)it reduce wasted of animal feeds
(ii)it increases level of hygiene of animal feeds
°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°
(2a)
F; Loamy soil
G; Clayey soil
H; Sandy soil
I; Earthworm
J; Termite
(2b)
(i)it makes corn to germinate well
(ii)it is Rich in humus
(iii)it is well created and not water logged
(2c)
(i)G; is reddish brown while H; is brownish in colour
(ii)G; is harder than H
(2d)
(i) Temperature
(ii) pH
(iii) Rainfall
(2e)
(i) Hard picking
(ii) Spraying with insecticides
°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°
(3a)
K; Grasshopper
L; Bean weevil
M; Mealybug
(3b)
K; bitting and chewing
L; boring
M; piercing and sucking
(3c)
K; cassava
L; Bean
M; cassava
(3d)
(i)it create holes in crops
(ii)it expose crops to attack of disease
(iii)reduce market value crops
(3e)
(i) Physical control
(ii) Biological control
(iii) Chemical control
°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°
(4a)
N; Animal skin
0; Tick
P; Roundworm
(4b)
(i)it serve as food
(ii)it is a raw material for making leather material
(4c)
(i)presence of proboscis
(ii)presence of legs
(4d)
(i)it causes disease in animal
(ii)it causes malnutrition in animal
(4e)
Under spec O;
(i) dog
(ii) cow
Under spec P
(i)goat
(ii)sheep
(4f)
(i) Physical control
(ii) Chemical control
