JAMB CBT PRACTICE TEST

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BIOLOGY LESSON NOTE ON HUMAN KIDNEY

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Lesson Note on the Human Kidney Topic: The Human Kidney Duration: 40 minutes Specific Objectives: By the end of the lesson, students should be able to: Define the kidney and state its location in the human body. Identify and describe the structure and functions of the kidney. Explain the processes involved in urine formation (filtration, reabsorption, and secretion). Describe how the kidney contributes to homeostasis. Identify common kidney-related diseases and how to prevent them. Evaluate the importance of maintaining kidney health. Lesson Content: 1. Introduction to the Human Kidney The kidneys are vital organs in the human body responsible for filtering waste from the blood and regulating water and electrolyte balance. They are part of the excretory system and play a crucial role in homeostasis. Location: The kidneys are located in the abdominal cavity, on either side of the spine, just below the rib cage. Each kidney is bean-shaped and about the size of a fi...
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2026 NECO Chemistry Practical Specimens, Questions and Solutions (Complete Guide)

2026 NECO Chemistry Practical Specimens, Questions and Solutions (Complete Guide)

The National Examinations Council (NECO) has officially released the Chemistry practical instructions and materials for the 2026 Senior School Certificate Examination (SSCE). Candidates are expected to perform experiments involving titration, qualitative analysis, observation, identification of salts, and chemical calculations.

This guide explains the official 2026 NECO Chemistry practical specimens, apparatus, and areas candidates should focus on during preparation.

Official 2026 NECO Chemistry Practical Specimens

The following chemicals will be supplied to candidates:

Specimen A

150 cm³ of Tetraoxosulphate (VI) Acid Solution (H₂SO₄)

Specimen B

150 cm³ of Sodium Hydroxide Solution (NaOH)

Specimen C

Copper (II) Tetraoxosulphate (VI) Crystals (CuSO₄)

In addition, candidates will have access to common laboratory reagents and apparatus.

Chemistry Practical Question 1: Acid-Base Titration

The first question is expected to involve a titration between the acid solution and sodium hydroxide solution.

Aim of the Experiment

To determine the concentration of one solution using another solution of known concentration.

Apparatus Required

  • Burette
  • Pipette
  • Conical Flask
  • White Tile
  • Funnel
  • Retort Stand

Procedure

  1. Rinse the burette with the acid solution.
  2. Fill the burette with the acid.
  3. Pipette 25 cm³ of sodium hydroxide into a conical flask.
  4. Add a few drops of methyl orange indicator.
  5. Titrate until the endpoint is reached.
  6. Record the titre value.
  7. Repeat to obtain accurate readings.

Precautions

  • Read the burette at eye level.
  • Remove the funnel before taking readings.
  • Avoid parallax errors.
  • Record readings accurately.

Chemistry Practical Question 2: Qualitative Analysis

Candidates may be required to identify the cation and anion present in Copper (II) Tetraoxosulphate (VI).

Observations

Appearance

  • Blue crystalline solid

Solubility in Water

  • Dissolves readily to form a blue solution

Tests for Copper (II) Ion

Test with Sodium Hydroxide

Observation

Light blue precipitate forms.

In Excess

Precipitate remains insoluble.

Inference

Copper (II) ion present.

Test with Ammonia Solution

Observation

Light blue precipitate forms initially.

In Excess

Precipitate dissolves to form a deep blue solution.

Inference

Copper (II) ion confirmed.

Test for Sulphate Ion

Reagent

Barium Chloride Solution

Observation

White precipitate forms.

Inference

Sulphate ion present.

Important Chemistry Practical Calculations

Candidates should revise:

Molarity Calculations

Formula:

Molarity = Moles ÷ Volume

Mole Calculations

Formula:

Moles = Mass ÷ Molar Mass

Concentration Calculations

Formula:

C₁V₁ = C₂V₂

These formulas are frequently used in NECO Chemistry practical examinations.

Common Laboratory Apparatus and Their Uses

Apparatus Use
Burette Accurate measurement of liquids during titration
Pipette Transfer of fixed volume of liquid
Conical Flask Mixing solutions during titration
Test Tube Carrying out reactions
Beaker Holding liquids
Measuring Cylinder Measuring volumes of liquids
Funnel Pouring and filtration

Common Laboratory Safety Rules

  1. Wear laboratory coats.
  2. Do not taste chemicals.
  3. Handle acids carefully.
  4. Read labels before use.
  5. Report accidents immediately.
  6. Wash hands after experiments.

Frequently Asked Chemistry Practical Questions

What is the Colour of Copper (II) Tetraoxosulphate (VI)?

Answer: Blue.

What Ion Causes the Blue Colour?

Answer: Copper (II) ion.

Which Indicator is Commonly Used in Acid-Base Titration?

Answer: Methyl Orange.

What is the Endpoint in a Titration?

Answer: The point at which the indicator changes colour permanently.

What Type of Reaction Occurs During Titration?

Answer: Neutralization reaction.

How to Score High in NECO Chemistry Practical

Learn Qualitative Analysis

Master all common cation and anion tests.

Practice Titration

Learn how to take accurate readings and calculate averages.

Study Laboratory Apparatus

Know their names and functions.

Revise Calculations

Most candidates lose marks due to calculation errors.

Master Observations and Inferences

Always separate observations from conclusions.

Conclusion

The 2026 NECO Chemistry Practical Examination is expected to focus mainly on titration, qualitative analysis, laboratory apparatus, and chemical calculations. Candidates who understand the properties of the supplied chemicals and practice practical procedures regularly will perform better in the examination.

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