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    Home»WAEC»NECO Chemistry Questions and Answers 2022 (100% Sure) Theory & Obj Expo Answers
    WAEC

    NECO Chemistry Questions and Answers 2022 (100% Sure) Theory & Obj Expo Answers

    By Jobs In Nigeria NowFebruary 17, 2023No Comments5 Mins Read

    NECO Chemistry Questions and Answers 2022  is now release for the June/July 2022.  NECO Chemistry Theory and Objective Answers (100%legit) Chemistry Essay verified Free  (Expo) for National Examination Council. NECO Chemistry Questions For you to have good NECO result in  Chemistry as well as repeated questions for free in this post. You will also understand how NECO Chemistry questions are set and how to answer them. The National Examination Council is an examination body in Nigeria that conducts the Senior Secondary Certificate Examination and the General Certificate in Education in June/July and November/December respectively.

    For those that would like to see the question paper, you can click on the link below:

    Click Here To see All NECO Chemistry Questions Paper & Answers

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    Please Note that the NECO 2022 Chemistry Questions and Answers  and any other NECO expo is provided by us for free. We understand that a lot of website charge of collect money from student to provide NECO expo Chemistry Answers to them. NECO questions and answers are provided for free. We will do same during Other Exam like  WAEC GCE.

    NECO Chemistry Questions and Answers 2022

    NECO 2022 Chemistry Questions  will be  posted in this page. Our Team are right now with the question paper. It is under verification and once tthe verification process complete, we will go ahead to upload it here.

    NECO Chemistry Questions and Answers 2022

     

     

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    NECO Chemistry Answers

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    (1ai)
    (i) KAl(SO₄)₂. 12H₂O
    (ii) Na₂SO₄

    (1aii)
    Number of moles of sodium reascted = reacting mass/molar mass
    = 3.6/23
    = 0.1565moles
    Number of moles of oxygen reacted = (1/4) x Number of sodium
    = 1/4 x (3.6/23)
    = 0.03913
    Reacting mass of oxygen = Number of moles x molar mass
    = 0.03913 x (16×2)
    = 1.252grams

    (1bi)
    Air in gaseous form is first passed through caustic soda to remove CO₂. It is compressed and cooled until ut becomes a liquid at -200°C. It is then led to a fractionating column. On distillation, Nitrogen which has a lowet boiling point of -196°C is evolced first leaving behind Oxygen in liquid form. Further heating converts the liquid to a gas at -183°C.

    (1bii)
    (i) It is used for combustion
    (ii) It is used for artificial respiration

    (1biii)
    This is because room temperature is warmer

    (1biv)
    (i) Methyl orange
    (ii) Phenophthalein

    (1ci)
    An ion is an atom or molecule which has a net electric charge due to the loss or gain of one or more electrons.

    (1cii)
    HCl gas doesn’t contain ions

    (1cii)
    (i) Noble gases: Neon, Helium
    (ii) Halogens: Iodine, Fluorine
    (iii) Alkaline earth metals: Calcium, Magnesium

    (1civ)
    Halogens attain stable octet configuration by accepting an electron from donors Group I elements.

    (1di)
    A sol is a colloid where solid particles are dispersed in liquid medium.

    (1dii)
    Jelly

    (1diii)
    (i) Acid-base titrations are used to determine the percentage purity of a substance
    (ii) Acid-base titrations are important to determine the number of water molecules in a hydrate.

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