CHEMISTRY- PRACTICAL-ANSWERS AND CHEMISTRY OBJECTIVE QUESTIONS AND ANSWERS
This Nabteb Chemistry Answers and Nabteb Chemistry Practical Questions and Answers Expo.
(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
(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
(1bii)
Animals
(1biii)
(i)its flesh are eaten by animals
(ii)the seeds are passed out as waste by some animal
(1biv)
Tabulate;
Under B
(i)it is yellowish in colour
(ii)beans like shaped
Under C
(i)it is reddish in colour
(ii)not beans like shaped
(1ci)
Tabulate
Under Observation;
(i)light passes through it but the other side can not be seen
Under Conclusion;
(i)it contains oil which makes the paper a translucent material
(1cii)
Fats and oil
(1ciii)
It serves as food.
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(2ai)
F; carrots
G; Irish potato
H; water Lily
I; prawn
(2aii)
It improve sight
(2aiii)
This is because it has a modified stem
(2aiv)
Tabulate
Under Observation;
(i)it gives a blue black colour
Under Conclusion;
(i)starch is present
(2bi)
(i)presence of big leaves
(ii)presence of cuticle
(iii)presence of horns
(iv)presence of rims
(2bii)
Crustacean
(2biii)
(i)presence of tail fin
(ii)presence of scales
(2biv)
Tabulate;
Under External features
(i)Tail fin
(ii) Antenna
(iii)legs/limbs
Under Function;
(i) Locomotion
(ii) sensitivity
(iii) locomotion
(2bv)
(i)it serves as food
(ii)it create employment opportunity
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(3a)
J; Tilapia Fish.
K; Tadpoles
L; spider
(3b)
Will Be Posted by 8am!!!
(3ci)
(i)Head
(ii)Cephalothorax
(3cii)
Arachnida
(3ciii)
(i)presence of wings
(ii)presence of book lung
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(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
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(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
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(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
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(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
Govt-Obj!
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law.
(iv) Legislative immunity:
This also undermines the application of the rule of law due to the fact that the members of the parliament cannot be sued or prosecuted for any false or libellous statement made in the house whereas an ordinary man on the street can be punished for the same statement.
(v) Delegated legislation:
The delegation of law making power to some bodies other than the legislature often brings about complexity of law and abuse of such power which may lead to violation of fundamental human rights of the citizens even without the opportunity of seeking redress.
(vi) The type of government:
The type and system of government practiced in a country will determine the degree of the application of the rule of law. In a country where military or unitary system of government is adopted, there will be minimum application of the rule of law.
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(1a)
A bill is a proposed law under consideration of the legislative arm which later be passed into law by the approval of the executive.
(1b)
(i) First reading:
This is the first stage of passing bill into law which requires the presentation of the drafted bill to the parliament. The bill is read to the hearing of the members of the legislature by the clerk of the house. After the title of the bill is read and there is no opposition, it will be printed into leaflets and distributed among the members for proper assessment before the second reading.
(ii) Second reading:
This is the stage which the bill will be deliberated and debated on. The presenter of the bill will be invited to explain the purpose of the bill and defend it. After which, the members will vote the bill to the next stage. If the bill receives majority votes, it will move to the next stage and if not, it will end without any amendment.
(iii) The committee stage:
Here, the bill is passed to one or more committees in the house for necessary amendment and discussion. There are different committees in the house which deliberate on different matters.
(iv) Report stage:
This is the stage in which the various findings about the bill will be documented during the of amendment. The findings or reports about the bill will be read by the speaker or Chairman of the standing committees.
(v) Third reading:
This is the last stage in which proper assessment and scrutinization will be carried out to ensure that the bill is properly amended. During this stage, another and final vote will be carried out before the bill is presented to the executive for approval. Once the assent is given to the bill by the executive president, then it bcomes law
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(7)
(i)Preservation of existing cultural values:
The system of indirect rule was a success in the North because it preserved the existing cultural values of the native and also assisted in improving them to gradually accept or adapt to a modern system of government.
(ii) The imposition and collection of tax:
The administration of indirect rule took the issue of tax collection very serious which was already in existence in the North.
(iii) Illiteracy:
Majority of the people in the North were illiterate as such they could not resist or challenge the colonial imposition or rule of the foreign power.
(iv) Centralization of power:
The administrative system in the North was highly centralised and it was thus adopted and accepted by the British through the use of the indirect rule.
(v) Obedience to traditional authorities:
Northern had great respect to constituted authorities and that made it easy for the indirect rule to be used to govern the people.
(vi) Training of local administrators:
The indirect rule aided in the training of the local leaders in the North in its method of administration.
(6a)
A local government authority is an organization that is officially responsible for all the public services and facilities in a particular area.
(6b)
(i) Statutory functions:
The local governments were given specific statutory functions to perform.
(ii) Single tier:
All the local governments were made all- purpose single tier local government.
(iii) Appointment:
There was the appointment of full-time chairmen and supervisory councillors.
(iv) Condition of service:
The condition of service oflocal government staffwasunified with that of their counter-parts in state and federal civil service.
(v) Grants: Federal and state governments were made to give grants to local governments.
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(5)
(i) Free and fair election:
Democracy is Characterised by regular and periodic free and fair election. In a democratic state, the citizens cast their votes and elect those that will represent their interest in various political offices as a means of indirect participation in running the affairs of the state but in a military system, it is devoid of free and fair election but selection by the supreme leader.
(ii) Application of rule of law:
Democracy recognizes the equality of all citizens or classes of people in the country regardless of their economic, political or social status as it is expressed by the rule of law and due process.
(iii) Existence of political parties:
Democracy recognizes the establishment and existence of political parties preferably multiple party system in which individual parties present candidates who compete for power in the general election.
(iv) Existence and respect of fundamental human right:
In a democratic system of government, fundamental human rights are recognized, protected and respected in all aspects of life which is not respected in the military system.
(iv) Supremacy of the constitution:
Democracy recognizes the supremacy of the constitution which determine the operationa and functions of all sectional groups and organizations in the state, showing that nobody is above the law but the constitution.
