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2021 neco mathematics answers are ready. Come now with your 1k to get them before the exams begin

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2021 NECO FISHERY PRACTICAL ANSWERS

(1a)
Specimen A - Hetertis Niloticus (Bony tongue)
Specimen B - Parachanna Obscura (Snake head fish)
Specimen C - Heterobranchus longifilis (Cat fish)
Specimen D - Frog

(1aiii)
-Differences:
(i) A has teeth on their tongue and roof of their mouth while B does not have teeth
(ii) A has a long head while B has a flattened head

-Similarities:
(i)They are both live in fresh water
(ii)They both have back bone
(iii)They both have gills for breathing
(iv)They both have teeth's
(v)They both eyespot
(vi)They both have tongue
(vii)Scales are present in the both of them

(1bi)
(i) Madtoms
(ii) Brown bullhead
(iii) Yellow bullhead

(1bii)
-Importance:
(i) They serve as food for the fish
(ii) They add certain nutrients to the environment

-Harmful effects:
(i) It compete with the fishes for food and other nutrients
(ii) They kill smallest fish in the pond

2021 neco chemistry practical answers

(1a)
Tabulate

Volume of pipette used=25cm3.
Indicator used= Methyl orange

Under Titration, Rough, 1st, 2nd, 3rd,

Final burette reading; |25.00| |23.40| |23.50| 23.60|

Initial burette reading; |0.00| |0.00| |0.00| |0.00|

Volume of A used; |25.00| |23.40| |23.50| |23.60|

(1ai)
Average volume of Acid used=23.40+23.50+23.60/3 =70.5/3=23.50cm3

(1aii)
This is because it is a reaction between a weak acid and strong base

(1aiii)
A funnel should be used while transferring the acid into the burette.

(1bi)
Conc of A in mol|dm³ =?
Conc of A in g|dm³ = 12.75g|dm³
Molar mass of A, NaHSO⁴ = 23+1+32+64
=120g|dm³

From.
Conc(mol/dm³) = conc(g/dm³)/molar mass

Conc =12.75/120
Conc =0.106mol/dm³

(1bii)
Con of B in mol/dm³ =?
Ca =0.106, Cb =? Va =23.50cm³, Vb =25.00cm³

na=1 , nb=1
From; CaVa/CbVb=na/nb
Cb=CaVanb/Vbna
Cb=0.10623501/25.001
Cb=2.5/25
Cb=0.1mol/dm³

(1biii)
Conc of B in g/dm³=?
Molar mass of B , NaOH=23+16+1=40g/mol
From; conc(g/dm³)=conc(mol/dm³)molar mass
=0.140
=4.0g/dm³

(1biv)
Mass of salt formed =?
Recall mole of NaHSO⁴=?
From; mole =con(mol/dm³)*vol(cm³)/1000

Mole=0.106*23.50/1000
Mole=0.0025mol of NaHSO⁴

By proportion 1mol of NaHSO⁴ produce 1mol of Na²SO⁴ 0.0025mol of NaHSO⁴ will produce X mol of Na²SO⁴ X=0.00251=0.0025mol of NaSO⁴
Molar mass of Na²SO⁴=(232) + 32 + (16*4)
=46+32+64
=142g/mol

Recall; mole =mole/molar mass
Mass =mole * molar mass
Mass =0.0025*142
Mass =0.36g of Na²SO⁴

(2a)

[PLEASE PUT IN A TABULAR FORM]

TEST
C + 5cm³ of distilled water

OBSERVATION
It dissolve completely

INTERFERENCE
C is a soluble salt

(2bi)
TEST
Solution + NaOH + Heat

OBSERVATION
Effervescence occurs in which a colourless gas with pungent smell and turns red litmus paper to blue is given off.

INFERENCES
NH³ gas from NH⁴+ is present

(2bii)
TEST
Stirring rod of HCL + gas given off

OBSERVATION
a gas which gives a pop sound is given off

INFERENCES
H² is present

(2ci)
TEST
Solution C + drops of BaCL²

OBSERVATION
a white precipitate is formed

INFERENCES
CO²^-3, SO²^-4, SO²^-3, May be present.

(2cii)
TEST
Solution in C(i) + dil HCL

OBSERVATION
the white precipitate dissolve is dil HCL and effervescence occurs in which a colourless and odourless gas which turns blue litmus red and lime water milky is given off

INTERFERENCE
CO² gas from CO²^3- confirmed

(3a)
(i)Ca²+
(ii)Pb²+

(3bi)
concentrated acid can be defined as an acid formed when a large quantity of an acid dissolve in a small or little volume of water.

(3bii)
A strong acid is defined as a type of acid that ionize completely in a solution

(3c)
Activated charcoal is used as an adsorbent material

(3d)
(i)Reddish – Brown
(ii) I – red, II – brown.

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PHYSICS PRACTICALS ANSWERS

(1xii)
(i) I avoided drought by closing the window
(ii) I avoided error due to parallax when reading the meter rule

(1bi)
Tabulate:
-Period-
(i)is the time taken on complete one oscillation/circle or to.
(ii) Its unit is second (s)
(iii) It is Oscillation motion
(iv) It is when a body moves in a to and fro manner

-Frequency of oscillation-
(i)is the number of complete oscillation in one second
(ii) Frequency unit is Hertz (Hz)
(iii) It is Rotation motion
(iv) It is when a body turns about an axis through the body

(1bii)
E= 25J
Extension= 6.7x10-²m
Force constant (k) = ?
E= 1/2ke²
2E = ke²
k = 2E/e²
k = 2x 25/(0.067)²
k = 50/0.00449
k = 11135.9Nm-¹

REMINDER!!!
2021 Neco Physics Practicals is coming up 12/7/2021 at 10:00am. Endeavor to send us a message before the exams begin in order to secure your spot

All Physics Practicals candidates should send a message to us. ANSWERS ARE READY

2021 NECO EXAMINATION TIMETABLE

Monday 5th July to Friday 9th July (Actual date and time will be fixed by the Council)

Paper 1: Practical – Physical Education
Paper 1: Practical – Auto Mechanics
Paper 1: Practical – Woodwork
Paper 1: Practical – Home Management
Paper 1: Practical – Foods and Nutrition
Paper 1: Performance Test, Music Technology/Alternative
Paper IV: Aural Music
Paper IV: Oral French
Paper IV: Oral Arabic
Paper 1: Practical – Auto Body Repair and Spray Painting
Paper 1: Auto Electrical Work
Paper 1: Practical – Auto Mechanical Work
Paper 1: Practical – Air Conditioning and Refrigeration
Paper 1: Practical – Welding and Fabrication, Engineering Craft Practice
Paper 1: Practical – Electrical Installation & Maintenance Work
Paper 1: Practical – Radio, Television and Electronics Work
Paper 1: Practical – Blocklaying, Bricklaying and Concrete Work
Paper IV: Exhibition – Painting and Decoration
Paper 1: Practical – Plumbing and Pipe Fitting
Paper 1: Practical – Machine Woodworking
Paper 1: Practical – Carpentry and Joinery
Paper 1: Practical – Furniture Making
Paper 1: Practical – Upholstery
Paper 1: Practical – Catering Craft Practice
Paper 1: Practical – Garment Making
Paper 1: Practical – Clothing and Textiles
Paper IV: Exhibition – Dyeing and Bleaching
Paper IV: Exhibition – Printing Craft Practice
Paper 1: Practical – Cosmetology
Paper IV: Exhibition – Photography
Paper IV: Exhibition – Leather Goods, Manufacturing and Repair
Paper 1: Practical – GSM Maintenance and Repairs
Paper IV: Progressive Assessments – Animal Husbandry
Monday 12th July

Paper 1: Practical – Physics – 10:00am – 12:45pm
Paper 1: Test of Practical – Health Education – 2:00pm- 3:30pm
Paper III & II: Objective & Essay – Health Education – 3:35pm- 5:35pm
Tuesday 13th July


Paper 1: Practical – Data Processing – 10:00am – 1:00pm
Wednesday 14th July

Paper 1: Practical – Chemistry – 10:00am – 12:00noon
Paper 1: Written Comprehension – French – 2:00pm- 3:00pm
Paper II: Written Expression – French – 3:00pm- 4:45pm
Thursday 15th July

Paper 1(b): Painting and Decoration (Practical) – 10:00am- 4:00pm
Paper 1(b): Dyeing and Bleaching (Practical) – 10:00am – 4:00pm
Paper 1(b): Printing Craft Practice (Practical) – 10:00am – 4:00pm
Paper 1(b): Photography (Practical) – 10:00am – 4:00pm
Paper 1(b): Leather Goods Manufacturing and Repair (Practical) – 10:00am- 4:00pm
Paper 1: Practical – Mining – 10:00am – 12:00noon
Paper 1: Practical – Fisheries – 10:00am – 11:30am
Paper 1: Practical – Animal Husbandry – 10:00am – 11:30am
Paper 1: Practical – Stenography – 10:00am – 11:17am
Paper IV: Practical – Stenography (Word Processing) – 2:00pm- 4:00pm
Paper 1: Practical – Metal Work – 2:00pm- 5:00pm

Friday 16th July

Paper III & II: Objective & Essay – Air-Conditioning & Refrigeration – 10:00am – 11:40am
Paper III & II: Objective & Essay – Electrical Installation & Maintenance Work – 10:00am – 12:00noon
Paper III & II: Objective & Essay – Blocklaying, Bricklaying & Concrete Work – 10:00am – 12:00noon
Paper III & II: Objective & Essay – Machine Woodworking – 10:00am – 11:40am
Paper III & II: Objective & Essay – Carpentry & Joinery – 10:00am – 12:00noon
Paper III & II: Objective & Essay – Upholstery – 10:00am – 11:30am
Paper III & II: Objective & Essay – Stenography – 10:00am – 12:00noon
Paper III & II: Objective & Essay – Animal Husbandry – 10:00am – 12:00noon
Paper III & II: Objective & Essay – Fisheries – 10:00am – 12:00noon
Paper 1(a): Painting and Decoration (Report Writing) – 10:00am – 12:00noon
Paper 1(a): Dyeing and Bleaching (Report Writing) – 10:00am – 12:00noon
Paper 1(a): Printing Craft Practice (Report Writing) – 10:00am – 12:00noon
Paper 1(a): Photography (Report Writing) – 10:00am – 12:00noon
Paper 1(a): Leather Goods Manufacturing and Repair (Report Writing) – 10:00am – 12:00noon
Monday 19th to Wednesday 21st July

SALLAH BREAK
Thursday 22nd July

Paper 1: Practical – Biology – 10:00am – 12;00noon
Paper 1: Practical – Technical Drawing – 2:00pm- 5:00pm
Paper III & II: Objective & Essay – Store Management – 2:00pm – 4:40pm
Friday 23rd July

Paper III & 1: Objective & Practical / Physical – Geography – 10:00am – 12:30pm
Monday 26th July

Paper 1: Practical – Computer Studies – 10:00am- 1:00pm
Tuesday 27th July

Paper 1: Practical – Agricultural Science – 10:00am – 11:30am
Paper III & II: Objective & Essay – History – 2:00pm- 5:00pm
Paper 1: Drawing – Building Construction – 2:00pm- 5:00pm
Wednesday 28th July

Paper III & II: Objective & Essay – Chemistry – 10:00am- 1:00pm
Paper III & II: Objective & Essay – Auto Mechanics – 2:00pm – 4:30pm
Paper III & II: Objective, Theory & Practice – Financial Accounting – 2:00pm- 5:50pm
Thursday 29th July


Paper III & II: Objective & Essay – Physics – 10:00am- 1:00pm
Paper III & II: Objective & Essay – Civic Education – 2:00pm- 5:00pm
Friday 30th July

Paper III & II: Objective & Essay – Agricultural Science – 10:00am – 12:30pm

Monday 2nd August

Paper II & III: Essay & Objective – English Language – 10:00am – 12:45pm
Paper IV: Test of Orals – English Language – 1:00pm- 1:45pm
Paper III & II: Objective & Essay – Physical Education – 3:00pm- 5:00pm
Paper III & II: Objective & Essay – Building Construction – 3:00pm- 5:00pm
Tuesday 3rd August

Paper IV: Creative Design – Visual Art – 10:00am- 1:00pm –
Paper 1: Drawing – Visual Art – 2:00pm- 5:00pm
Paper 1: Practical – Basic Electricity – 2:00pm- 5:00pm
Wednesday 4th August

Paper III & II: Objective & Essay – Economics – 10:00am- 1:00pm
Paper III & II: Objective & Essay – Metal Work – 3:00pm – 5:30pm
Thursday 5th August

Paper III & II: Objective & Essay – Biology – 10:00am – 12:30pm
Paper III & II: Objective & Essay – Hausa – 2:00pm – 5:00pm
Paper III & II: Objective & Essay – Igbo – 2:00pm – 5:00pm –
Paper III & II: Objective & Essay – Yoruba – 2:00pm – 5:00pm
Paper ill & II: Objective & Essay – Edo – 2:00pm – 5:00pm
Paper III & II: Objective & Essay – Efik – 2:00pm – 5:00pm
Paper III & II: Objective & Essay – Ibibio – 2:00pm – 5:00pm
Friday 6th August

Paper II: Essay – Human and Regional Geography – 10:00am – 12:00noon
Paper III & II: Objective & Essay – Foods & Nutrition – 3:00pm-5:30pm
Saturday 7th August

Paper 1: Practical – Electronics – 10:00am – 1:00pm –
Paper III & II: Objective & Essay – Government – 10:00am – 12:40pm
Paper III & II: Objective & Essay – Home Management – 3:00pm- 5:30pm
Monday 9th August

Paper III: Objective – General Mathematics – 10:00am – 11:45am –
Paper II: Essay – General Mathematics – 12:00noon – 2:30pm
Paper III & II: Objective & Essay – Woodwork – 3:30pm- 5:30pm
Tuesday 10th August

Paper III & II: Objective & Essay – Auto-Body Repair and Spray Painting – 10:00am- 12:30pm
Paper III & II: Objective & Essay – Auto Electrical Work – 10:00am- 12:30pm
Paper III & II: Objective & Essay – Auto Mechanical work – 10:00am- 12:30pm
Paper III & II: Objective & Essay – Auto Parts Merchandising – 10:00am-12:15pm
Paper III & II: Objective & Essay – Welding & Fabrication Engineering Craft Practice – 10:00am- 1:00pm
Paper III & II: Objective & Essay – Radio, Television & Electronics Work – 10:00am – 12:30pm
Paper III & II: Objective & Essay – Plumbing St Pipe Fitting – 10:00am- 12:30pm
Paper IV: Drawing & Design – Furniture Making – 10:00am – 12:00noon
Paper III & II: Objective & Essay – Furniture Making – 12:30pm- 2:15pm
Paper III & II: Objective & Essay – Catering Craft Practice – 10:00am – 12:30pm
Paper III & II: Objective & Essay- Garment Making – 10:00am – 12:30pm –
Paper III Si II: Objective & Essay – Clothing St Textiles – 10:00am – 12:30pm
Paper III & II: Objective & Essay – Cosmetology – 10:00am – 12:30pm
Paper III & II: Objective & Essay – Minning – 10:00am-12:45pm
Paper III & II: Objective & Essay – Tourism – 10:00am- 1:30pm
Paper III Si II: Objective & Essay – Data Processing – 10:00am- 1:00pm
Paper III & II: Objective & Essay – Store Keeping – 10:00am – 12:40pm
Paper III & II: Objective & Essay – Book Keeping – 10:00am – 1:50pm
Paper III & II: Objective & Essay – GSM Maintenance St Repairs – 10:00am – 1:00pm
Paper III Si II: Objective & Essay – Marketing – 10:00am-12:40pm
Paper III & II: Objective & Essay – Salesmanship – 10:00am-12:40pm
Paper III & II: Objective & Essay – Electronics – 2:30pm – 4:30pm
Paper III & II: Objective & Essay – Office Practice – 2:30pm- 5:30pm

Wednesday 11th August


Paper III & II: Objective & Essay – Commerce – 10:00am – 12:40pm
Paper III & II: Objective & Essay – Basic Electricity – 10:00am – 12:15pm
Paper III & II: Objective & Essay – Music – 2:00pm – 4:30pm
Paper III & II: Objective & Essay – Visual Art – 2:00pm – 5:00pm
Thursday 12th August

Paper III & IV: Objective Si Drawing – Technical Drawing – 10:00am- 12:30pm
Paper III & II: Objective, Essay St Literature – Arabic – 2:00pm- 5:30pm
Friday 13th August

Paper II: Drama & Poetry – Literature in English – 10:00am – 11:40am
Paper III & II: Objective & Essay – Insurance – 3:00pm – 5:40pm
Saturday 14th August

Paper III & II: Objective & Essay – Computer Studies – 10:00am – 1:00pm
Paper III & II: Objective & Essay – Christian Religious Studies – 3:00pm – 5:30pm
Paper III & II: Objective & Essay – Islamic Studies – 3:00pm – 5:30pm
Monday 16th August

Paper III: Objective – Further Mathematics – 10:00am – 12:00noon
Paper II: Essay – Further Mathematics – 12:15pm – 2:45pm
Paper III & IV: Objective St Prose – Literature in English – 3:15pm- 5:30pm
Paper IV: Drawing & Design – Woodwork – 3:15pm-5:15pm

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