Connect with us

NABTEB GCE

2021 NABTEB GCE Chemistry Practical Answers

Published

on

Get Free Live 2021 NABTEB GCE Chemistry Practical (CHEMISTRY PRACTICAL) Questions and Answers Free of Charge | NABTEB Nov/Dec GCE Free Chemistry (Practical) Questions and Answers EXPO Room (17th November, 2021).
NABTEB NOV/DEC GCE 2021 FREE CHEMISTRY PRACTICAL (CHEM) QUESTION AND ANSWER ROOM

Alternative to Chemistry Practical (9:00am-11:00am)

NABTEB NOV/DEC GCE CHEMISTRY PRACTICAL ANSWERS 2021:

•••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••
ADVANCED NABTEB CHEMISTRY PRACTICAL ANSWERS
•••••••••••••••••••••••••••••••••••••••••

NABTEB GCE CHEMISTRY PRACTICAL SOLUTIONS (O’LEVEL)

(1)
TABULATE
Final reading: 24.50| 48.80 | 25.60
Initial burette readings: 0.00| 24.40 | 1.00
Volume of acid used: 24.50| 24.40 | 24.60

(1ai)
Volume of acid used = Final burette readings – Initial burette readings

1st titration = 24.50cm³ – 0.00cm³ = 24.50cm³

2nd titration = 48.80cm³ – 24.40cm³ = 24.40cm³

3rd titration = 24.50cm³ – 1.00cm³ = 24.60cm³

(1aii)
Average titre value = 1st + 2nd + 3rd/3
24.50 + 24.40 + 24.60/3
73.50/3 = 24.50cm³

(1bi)
MA = 0.08mol/dm³, VA = 24.5cm³, MB =? , VB = 25.0cm³, NA= 1, nB= 2
MAVA/MBVB = nA/nB
0.08×24.50/25MB = 1/2
25MB = 3.92
MB = 3.92/25 = 0.157
MB = 0.157mol/dm³

(1bii)
Mass concentration = Molar concentration × Molar mass
Molar concentration of acid = 0.08mol/dm³, Molar mass = 2×1+3+32+16×4 = 98g/mol
Mass concentration = 0.08 × 98 = 7.84g/dm³

(1biii)
Molar mass = Mass concentration/Molar concentration
Molar mass = 0.08/0.157 = 56g/mol

(1biv)
YOH = 56
Y + 16 + 1 = 56
Y + 17 = 56
Y = 56 – 17 = 39g

(1bv)
Methyl orange

(1c)
(i) Air bubbles in the burette
(ii) No indicator is use
(iii) Funnels should be removed before titration starts to avoid droplets
(iv) incorrect of reading and scale
=============================

(2a)
=TEST=
(i) C + NaOH (aq) in drops then in excess
(ii) C + NH3(aq) in drops then in excess
(iii) C + BaCl(aq) then followed by dil.HCl

=OBSERVATION=
(i) Blue gelatineous precipitate
(ii) Precipitate dissolves in excess white precipitate
(iii) Precipitate Insoluble

=INFERENCE=
(i) Cu²+ present
(ii) Cu²+ present
(iii) SO4²+ present

(2b)
=TEST=
(i) D + H2O
(ii) Solution of D + NaOH2(aq) in drops then in excess
(iii) Solution of D + NH3(aq) in drops then in excess
(iv) Solution of D + FeSO4(aq) then followed by H2SO4(aq)

=OBSERVATION=
(i) D dissolves in H2O
(ii) White gelatineous precipitate dissolves in excess
(iii) White gelatineous precipitate dissolves in excess
(iv) A brown ring is observed in the rest tube

=INFERENCE=
(i) D is a soluble salt
(ii) Zn²+ present
(iii) Zn²+ present
(iv) NO3+ present
NO3- Confirmed

=============================

(3ai)
P – sulphur
Q – Sulphur (iv) oxide or SO2
S – Sulphur trioxide or SO3
T – Barium tetraoxosulphate (iv) or BaSO4

(3aii)
R could be vanadium (v) oxide or platinum
2SO2(g) + O2(g) ⇌2SO3(g)

(3aiii)
No, this is because hydrochloric acid cannot dissolve tetraoxosulphate (iv) acids from its salt

(3bi)
A black coloration is observed due to the formation of lead (ii) sulphide
Pb (CH3COO)2 + H2S ⇌ Pbs + 2CH3COOH

(3bii)
A yellow deposit of sulphur is observed due to a redox reaction
2H2S + SO2 ——-> 3S + 2H2O

Please note that you must keep refreshing this page for the 2021 NABTEB GCE Chemistry Practical until you see –NABTEB GCE Chemistry Practical 2021 questions and answers completed. Once the questions and answers are posted, you will not see any thing like keep refreshing.

Keep refreshing the page forNABTEB GCE Chemistry Practical questions and answers

NABTEB GCE Chemistry Practical  Questions and Answers 2021 Objectives Answers LOADING……

KEEP REFRESHING FOR MORE……………..

 Join this telegram group for updates

Continue Reading
Click to comment

Leave a Reply

Your email address will not be published. Required fields are marked *

NABTEB GCE

NABTEB GCE Civic education 2021 Verified Essay and Objective Answers

Published

on

By

Get Free Live 2021 NABTEB GCE Civic education Questions and Answers Free of Charge | NABTEB Nov/Dec GCE Free Civic education Questions and Answers EXPO Room (10 DECEMBER, 2021).
NABTEB NOV/DEC GCE 2021 FREE Civic education QUESTION AND ANSWER ROOM

NABTEB O-LEVEL CIVIC EDUCATION
=================================
*Civic-Obj*

1ACCDBCCDAC
11BCDABCAABC
21DAABBCCCDA
31BCDABCBDAA
41CCDABCDABD



================
===============

(1a)
Justice has to do with moral rightness based on ethics, religion, rationality, law, fairness and equity. It illustrates applications of the notion of proper balance: a fair trial, which among other things depicts neutrality and fairness between the ability of the defendant and prosecution to establish innocence and guilt respectively.

(1b)
(i)It defends people from racism
(ii)It protects people with disabilities
(iii)It ensures everyone gets adequate healthcare
(iv)It protects people from ageism
(v)It protects people from religion-based discrimination




(i)It defends people from racism; Discrimination based on race is another huge issue in most societies. It can make it hard for people to find work, live in peace, marry who they want, and more. A major trait of social justice is that people of every race can live well and have equal opportunities.

(ii)It protects people with disabilities; Disability rights have been ignored and neglected for many years, but with social justice on the rise, people are finally getting a voice. Those with both visible and invisible disabilities (like mental illness) are often discriminated against in their workplace, in healthcare, and more. For social justice to truly be justice for all, disability rights need to be included.

(iii)It ensures everyone gets adequate healthcare; The importance of good health can’t be overstated. It’s a matter of life and death. A society’s healthcare system determines who gets what services, and how much they have to sacrifice to get the care they need. When people strive for social justice in healthcare, they are working for better and more affordable insurance plans, access to medication, and more.





(iv)It protects people from ageism; As people get older, they are often discriminated against simply because of their age. They might get fired from their job in favor of someone younger, or get treated with disrespect in their daily lives. Ageism, as a form of discrimination, falls under the scope of social justice.

(v)It protects people from religion-based discrimination; A person’s religion is a central part of them, and freedom from religious discrimination falls right into the lap of social justice. Many countries have laws that discourage religious freedom, while others fail to enforce protections. Social justice advocates want all religions to be free and safe, including a person’s right to not follow any religion.
=============================
(3a)
Youth empowerment is a development programme aimed at creating opportunities that will encourage and develop the youths to be morally responsible, self-reliant and financially product citizens. It is also known as the process of giving young people opportunity to develop the ability they need to become peo who can influence their communities.

(3b)
(i) Good Education Standard; Youth empowerment will help youth understand the importance of soft skills training and education that will definitely lead towards making a better Standard education system.

(ii) Crime Reduction; Empowering the youth will help to understand the crimes on a deeper level and that will make sure that they stand against anti-social activities. Empowerment enables individuals with a mindset that helps them to differentiate between what’s wrong and what’s right and choosing a path of justice, truth, and peace.



(iii) Poverty Eradication; When youths are equipped with the essential skills, those skills will help them to lead a better life later. It’s like an investment in their present which will pay off in the future. Youth empowerment will help to increase the employability of youth which will add to the GDP of the nation and national economy.

(iv) Better Standing of living; Empowering the youths is important as they are the future of the country, it will be a stepping stone towards attaining a better tomorrow. Empowering them will help to learn and achieve which will add up for their future and help them to live a standard life.

=============================

(4a)
A cultist is a person who practice excessive devotion to a figure, object, or belief system, typically following a charismatic leader

(4b)
(i)Revenge; Revenge against others is another major reason why students join cults. In a bid to get back at those who had wronged or injured them, they join cults and hide behind its shadows to perpetuate their dastardly acts.

(ii)Popularity: People love the feeling of been feared, they love the feeling of being popular negatively, and to achieve this, they simply join up because they want to be popular and dreaded by other students on campus. The result as we all know is that they end up living in a perpetual state of fear and hiding from rival cult members

(iii)Quest for Power: Many students want to feel superior and more powerful than other students, so they join cult groups to give themselves this false feeling of superiority.

(iv)Search for Protection: They join cult groups in the quest to be protected from being intimidated by others, especially cult members. After joining these cults they soon discover that they are not being protected at all but instead their lives have been kept on the line.




(v)Ignorance: lot of students have joined secret cults in pure ignorance. They were lured to the meeting by an old member under the guise of escorting them to “somewhere”. And once initiated, denouncing your membership is never an easy option.

(vi)Peer Group Influence: Many students join cult groups following persuasion from their friends who are already members. This is why it is very important to keep the right company of friends at all times.
=============================
(5)
(i) A constitution refers to the basic principles and laws of a nation or state that determine the powers and duties of the government and also provides the platform or base for determining the fundamental rights and duties of the people. It is also a body of fundamental principles or established precedents according to which a state or other organisation is acknowledged to be governed.

(iii) Political parties are an organised group of people with at least roughly similar political aims and opinions, that seeks to influence public policy by getting its candidates elected to public office. They can link the governmental institutions to the elements of the civil society in a free and fair society and are regarded as necessary for the functioning any modern democratic political system.

(iv) Civil societies refers to any non-governmental entities formed by a group of people with similar interests who come together to work on a common cause. It is a society in which each individual is allowed to pursue their own separate interest, as long as it does not harm anyone else.

(v) Armed forces are military forces authorized to use lethal or deadly force and weapons to support the interests of the state and some or all of its citizens. They are typically officially authorized and maintained by a sovereign state, with its members identifiable by their distinct military uniform

(vi) Free press is a situation whereby the press has the opportunity to freely express its opinion and national views on national issues. Such freedom implies the absence of interference from an overreaching state, its preservation may be sought through constitution or other legal protection and security.

=============================

Completed!.

NABTEB GCE Civic education ANSWERS

Keep refreshing the page for NABTEB GCE Government questions and answers

Continue Reading

NABTEB GCE

NABTEB GCE FINANCIAL ACCOUNTING 2021 Verified Essay and Objective Answers

Published

on

By

Get Free Live 2021 NABTEB GCE FINANCIAL ACCOUNTING Questions and Answers Free of Charge | NABTEB Nov/Dec GCE Free FINANCIAL ACCOUNTING Questions and Answers EXPO Room (1 DECEMBER, 2021).
NABTEB NOV/DEC GCE 2021 FREE FINANCIAL ACCOUNTING QUESTION AND ANSWER ROOM

FINANCIAL ACCOUNTING O-LEVEL
01-10: BCBDDACACB
11-20: DDBBBBCCDA
21-30: BACADBDBCC
31-40: AADABCADAA
41-50: ADDDBCCBBC

COMPLETED

NABTEB FINANCIAL ACCOUNTING O-LEVEL
==================================

(1a)
A ledger is a book or collection of accounts in which account transactions are recorded.

(1b)
(i) Personal Accounts:
These are accounts in which transactions with persons or other business organization are recorded. Example are debtors and creditors. The capital account is a special kind of account.

(ii) Real Account:
They are impersonal accounts which record transactions relating to property or material objects. Examples include accounts of land and buildings, motor vehicles, stock of goods bought for resale.

(1c)
(i) Rent Account
(ii) Commission received Account
(iii) Salary Account
(iv) Wages Account
(v) Conveyance Account
=============================

(2a)
(i) AUTHORIZED CAPITAL
Authorized Capital implies the maximum ceiling of share capital which can be raised by a company from the public by issuing shares.

(ii) ISSUED CAPITAL
issued capital is a part of the authorized capital, which is offered to the general public for subscription

(2b)
(i) Name of the company
(ii) Registered office of the company
(iii) The objectives of the company
(iv) The amount of authorized Capital
(v) A statement of the effect that the liability of the company is limited

(2c)
Articles of association form a document that specifies the regulations for a company’s operations and defines the company’s purpose.
=============================

(3)
[img]https://i.imgur.com/rfpRZng.jpg[/img]
[img]https://i.imgur.com/OoYtK8Q.jpg[/img]
=============================
(4)
[img]https://i.imgur.com/0vH3uMr.jpg[/img]
=============================

(6)
[img]https://i.imgur.com/DLFejOs.jpg[/img]
=============================

(7)
[img]https://i.imgur.com/4rBGQnC.jpg[/img]
=============================

NABTEB GCE FINANCIAL ACCOUNTING ANSWERS

Keep refreshing the page for NABTEB GCE FINANCIAL ACCOUNTING questions and answers

NABTEB GCE FINANCIAL ACCOUNTING  Questions and Answers 2021 Objectives Answers LOADING……

KEEP REFRESHING FOR MORE……………..

 Join this telegram group for updates

 

Continue Reading

NABTEB GCE

NABTEB GCE BIOLOGY 2021 Verified Essay and Objective Answers

Published

on

By

Get Free Live 2021 NABTEB GCE BIOLOGY Questions and Answers Free of Charge | NABTEB Nov/Dec GCE Free BIOLOGY Questions and Answers EXPO Room (17th November, 2021).
NABTEB NOV/DEC GCE 2021 FREE BIOLOGY QUESTION AND ANSWER ROOM

BIOLOGY OBJ
1CBABACBBDC
11CBCBCBBADD
21DDBACBBCAD
31ACAADBBBDA
41DCADDACADC

*NABTEB GCE BIOLOGY ANSWERS*

_PART I: ANSWER ONE(1) ONLY_

(1a)
Diagram

(1b)
(i) Colonial organisms appear as a sphere while Filamentous organisms appear as a thread
(ii) Colonial organisms are generally sessile while Filamentous organisms are either sessile or floating

(1c)
(i) Colonial organisms: Volvox, Pandorina, Eudorina
(ii) Filamentous organisms: Chladophora, spirogyra, Zygnema

≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠

_PART II: ANSWER ONE(1) ONLY_

(2a)
(i) Crop rotation
(ii) Cover crops
(iii) Conservation tillage
(iv) Contour farming
(v) Mulching

(2b)
(i) Reproduction is the process of producing offsprings that are biologically or genetically similar to the parent organism.

(ii)
(a) budding
(b) fragmentation
(c) vegetative propagation
(d) spore formation

(2c)
(i) It is the number one source of oxygen in the atmosphere.
(ii) It contributes to the carbon cycle between the earth, the oceans, plants and animals.
(iii) It contributes to the symbiotic relationship between plants, humans and animals.
(iv) It serves as the primary energy process for most trees and plants.

≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠

(3ai)
(i) Help aeration of the soil.
(ii) Composting process which forms manure.
(iii) Enriches the soil with nitrates and other nutrients.

(3aii)
(i) Minerals
(ii) Organic matter
(iii) Water
(iv) Air

(3bi)
Stem:
When unilateral light falls on the stem, the auxin/growth hormone/IAA is displaced from the lighted to the dark side. The increase in auxin concentration on the dark side increases growth on that side causing the stem to bend towards the light/positive phototropism.

Roots:
The auxin is displaced from the lighted side to the dark side. The increase in auxin concentration retards growth on the dark side causing the root to bend away from the light/negative phototropism.

(3bii)
TABULATE
=Tropic Movement=
(i) Response to unilateral stimulus
(ii) Not reversible

=Nastic Movement=
(i) Response to diffuse stimulus
(ii) Reversible

≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠

_PART III: ANSWER ONE(1) ONLY_

(4ai)
Enzymes can be defined as biological polymers that catalyze biochemical reactions.

(4aii)
(i) They are affected by pH and temperature
(ii) They can be allosterically regulated by a several means
(iii) Are not destroyed or altered by the reactions which they catalyse

(4b)
(i) Transports hormones and nutrients throughout the body
(ii) Transports oxygen to cells and removes carbon dioxide

(4c)
(i) Fertilization is the process of reproduction in which fusion of male gamete with the female gamete takes place and results in formation if zygote cell.

(ii) Gestation is the The period of time during which an infant animal or human physically develops inside the mothers body until it is born.

(iii) Lactation is the process of milk secretion from the mammary glands of a mother soon after childbirth.

(iv) Hormones are chemicals synthesized and produced by the specialized glands to control and regulate the activity of certain cells and organs.

≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠

(5a)
TABULATE

(i)
– Vector: Tse-tse fly
– Causative organism: Trypanosoma brucei
– Diseases transmitted: Sleeping sickness

(ii)
– Vector: Anopheles mosquito
– Causative organism: Plasmodium
– Diseases transmitted: Malaria

(iii)
– Vector: Black fly
– Causative organism: Onchocerca volvulus
– Diseases transmitted: River blindness

(5b)
(i) Voluntary action: Involves the response to a stimulus that is controlled at will by the brain. in this action, an impulse is carried from a sensory neurone via the spinal cord to the brain which interprets and sends the message back through the motor neurone to effector organ. The action is not automatic. e.g. running, writing, jumping, laughing, reading, smiling.

(ii) Involuntary action or reflex action: It is a rapid or automatic response to a stimulus. It does not involve the brain for initiation. Therefore, the action is not under the control of the will, e.g. sneezing, coughing, knee jerk, salivation, secretion of grand, blinking

(5c)
(i) Malnutrition
(ii) Decrease in population size
(iii) Natural disasters

≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠

_PART IV: ANSWER ONE(1) ONLY_

(6ai)
Succession is defined as the orderly changes that occur in plant and animal community of a given area over a period of time until a stable community is formed

(6aii)
(a) Nudation
(b) Invasion
(c) Competition and reaction
(d) Stabilization or climax
09134339898
(6b)
(i) Bush burning: It destroys timber, young trees, seeds and the humus rich soil. The natural habitats of animals especially mammals and birds are destroyed.

(ii) Pesticides: It can contaminate soil, water, turf, and other vegetation. In addition to killing insects or weeds, pesticides can be toxic to a host of other organisms including birds, fish, beneficial insects, and non-target plants.

(iii) Fertilizers: Fertilizers release nutrients as they enter surface water. These nutrients stimulate microorganism growth and reproduction, reducing the dissolved oxygen found in marine ecosystems. Fish and other aquatic species suffocate when their habitat doesn’t have enough dissolved oxygen in surface water.

(6c)
(i) Used for cross breeding
(ii) To study about the hereditary nature of plants
(iii) Used for artificially selecting the type of crop

≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠≠

*≠COMPLETED≠*

NABTEB GCE BIOLOGY ANSWERS

Keep refreshing the page for NABTEB GCE BIOLOGY questions and answers

NABTEB GCE BIOLOGY  Questions and Answers 2021 Objectives Answers LOADING……

KEEP REFRESHING FOR MORE……………..

 Join this telegram group for updates

 

Continue Reading

Trending

Copyright © 2024 All Rights Reserved Owned And Designed by Flashgist.com.ng