NECO ChemistryPast Questions & Explanations

Practice 158+ NECO Chemistry questions from the SuperPrep question bank. Every question comes with a full explanation so you learn the method, not just the answer.

1. 1.

   Chemistry is the branch of science that deals with the study of?

   1. A.Living organisms only
   2. B.Matter and its changes
   3. C.The Earth alone
   4. D.Stars and planets

   Show explanation

   Chemistry is the study of matter, its composition, properties, and the changes it undergoes.
2. 2.

   Which of the following is a laboratory safety rule?

   1. A.Taste chemicals to identify them
   2. B.Read labels before using chemicals
   3. C.Run around the laboratory
   4. D.Mix chemicals without instructions

   Show explanation

   Reading labels helps identify chemicals and prevents accidents.
3. 3.

   The laboratory coat is worn mainly to?

   1. A.Look professional
   2. B.Protect the body and clothing
   3. C.Keep warm
   4. D.Store chemicals

   Show explanation

   Laboratory coats protect the body and clothes from chemical spills.
4. 4.

   Which of the following is considered matter?

   1. A.Light
   2. B.Heat
   3. C.Air
   4. D.Sound

   Show explanation

   Matter is anything that has mass and occupies space; air satisfies both conditions.
5. 5.

   Safety goggles are used in the laboratory to protect the?

   1. A.Hands
   2. B.Hair
   3. C.Eyes
   4. D.Feet

   Show explanation

   Safety goggles protect the eyes from chemical splashes and flying particles.
6. 6.

   The scientific study of the composition and properties of substances is known as?

   1. A.Biology
   2. B.Physics
   3. C.Chemistry
   4. D.Geography

   Show explanation

   Chemistry focuses on the composition, properties, and reactions of substances.
7. 7.

   Which laboratory apparatus is commonly used for measuring the volume of liquids?

   1. A.Thermometer
   2. B.Measuring cylinder
   3. C.Balance
   4. D.Bunsen burner

   Show explanation

   A measuring cylinder is used to measure the volume of liquids accurately.
8. 8.

   When heating a test tube, it should be pointed?

   1. A.Towards yourself
   2. B.Towards others
   3. C.Away from people
   4. D.Downwards

   Show explanation

   A heated test tube should always be pointed away from people to avoid injury.
9. 9.

   Which of the following is NOT a branch of chemistry?

   1. A.Organic Chemistry
   2. B.Inorganic Chemistry
   3. C.Physical Chemistry
   4. D.Astronomy Chemistry

   Show explanation

   Astronomy Chemistry is not a recognized branch of chemistry.
10. 10.

    What should you do immediately after a chemical spill on your skin?

    1. A.Ignore it
    2. B.Wash with plenty of water
    3. C.Cover it with paper
    4. D.Continue the experiment

    Show explanation

    Chemical spills should be washed off immediately with plenty of water.

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11. 11.

    The laboratory is a place where?

    1. A.Scientific experiments are conducted
    2. B.Food is sold
    3. C.Sports are played
    4. D.Meetings are held

    Show explanation

    A laboratory is designed for scientific experiments and investigations.
12. 12.

    Which of the following laboratory apparatus is used for heating substances?

    1. A.Bunsen burner
    2. B.Balance
    3. C.Beaker
    4. D.Pipette

    Show explanation

    A Bunsen burner provides heat for laboratory experiments.
13. 13.

    Matter is anything that has?

    1. A.Energy only
    2. B.Mass and occupies space
    3. C.Volume only
    4. D.Colour only

    Show explanation

    Matter has mass and occupies space.
14. 14.

    Which safety device is used to put out small laboratory fires?

    1. A.Fire extinguisher
    2. B.Measuring cylinder
    3. C.Test tube
    4. D.Retort stand

    Show explanation

    Fire extinguishers are used to control and extinguish fires.
15. 15.

    Before carrying out an experiment, a student should first?

    1. A.Mix chemicals
    2. B.Read and understand the procedure
    3. C.Light the burner
    4. D.Wear perfume

    Show explanation

    Understanding the procedure helps prevent mistakes and accidents.
16. 16.

    Which branch of chemistry deals with carbon compounds?

    1. A.Inorganic Chemistry
    2. B.Organic Chemistry
    3. C.Analytical Chemistry
    4. D.Physical Chemistry

    Show explanation

    Organic chemistry studies carbon-containing compounds.
17. 17.

    Why is eating prohibited in the chemistry laboratory?

    1. A.To save food
    2. B.To prevent contamination and poisoning
    3. C.To reduce noise
    4. D.To improve concentration only

    Show explanation

    Food may become contaminated with harmful chemicals, leading to poisoning.
18. 18.

    Which of the following best describes chemistry?

    1. A.The study of living things
    2. B.The study of matter and energy changes
    3. C.The study of weather
    4. D.The study of maps

    Show explanation

    Chemistry deals with matter, its properties, and the changes it undergoes.
19. 19.

    A student accidentally breaks a piece of laboratory glassware. The first action should be to?

    1. A.Hide the broken glass
    2. B.Inform the teacher immediately
    3. C.Throw it into a sink
    4. D.Leave it on the bench

    Show explanation

    All accidents and breakages should be reported immediately to the teacher or laboratory supervisor.
20. 20.

    The importance of laboratory safety rules is to?

    1. A.Increase experiment time
    2. B.Prevent accidents and injuries
    3. C.Reduce learning
    4. D.Avoid using apparatus

    Show explanation

    Laboratory safety rules are designed to protect people and equipment from harm.