JAMB CBT Chemistry 2023 Past Questions 21 - 40

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  • Опубліковано 22 гру 2024

КОМЕНТАРІ • 74

  • @Nazavlogs-y8y
    @Nazavlogs-y8y 9 місяців тому +5

    Im really enjoying these lessons

  • @daniyo9983
    @daniyo9983 9 місяців тому +2

    Good day sir.in number 24 for electrolysis.i think the answer is A.Because for the issue of preferential discharge there are some factors which affect atoms being discharged which are
    1.)Nature of electrode
    2.)Position of the atoms in the electrochemical series
    3.)Concentration of the ions
    Ibetween OH ions and CL ions it is Cl that will be preferentially discharged at the Anode because it is of higher concentration than OH ions .because in the electronegative series Cl Is closer OH ions because of this it will ne preferentially discharged as it is more concentrated instead of OH ions

    • @MyschoolNigeria
      @MyschoolNigeria  9 місяців тому +1

      The question said aqueous sodium chloride not concentrated sodium chloride, so how is the concentration of chlorine more than that of hydroxide in aqueous solution of sodium chloride?

  • @DanielOkereke-x8f
    @DanielOkereke-x8f 8 місяців тому

    You are doing very well sir

  • @UkadoAbrahamMmesomachi
    @UkadoAbrahamMmesomachi 9 місяців тому

    The example you gave for filtration in no.36 is for decantation. And filtration is done by the use of filter paper e.g chalk dust suspended in water

    • @MyschoolNigeria
      @MyschoolNigeria  9 місяців тому +1

      You're right, both of the examples are close, you can filter off water to get sand.

  • @jillavida7784
    @jillavida7784 10 місяців тому +1

    U are a detailed teacher sir 💯

  • @PhilomenaBella
    @PhilomenaBella 9 місяців тому

    U are the best ❤
    I understood everything

  • @ClassicCHOV-uk2pn
    @ClassicCHOV-uk2pn 8 місяців тому

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  • @Odenigbomaryannukamaka5
    @Odenigbomaryannukamaka5 10 місяців тому +1

    Good job

  • @SaffiatouDarboe-p4v
    @SaffiatouDarboe-p4v 9 місяців тому

    Thank you sir am great full I need questions on chemistry 2021 and practical

    • @MyschoolNigeria
      @MyschoolNigeria  9 місяців тому

      Click on this link ua-cam.com/video/2mbgvyehiOU/v-deo.html&ab_channel=Myschool

  • @Idiegegrace-q6p
    @Idiegegrace-q6p 10 місяців тому

    Well done God bless you sir

  • @OYENIRANROFIAT-t7b
    @OYENIRANROFIAT-t7b 9 місяців тому +1

    Yes sir I need explanation on this jamb question chemistry 1983 typing it will be long .
    It says that x is a crystalline salt of sodium solution....🙏

  • @Peace-t3g
    @Peace-t3g 10 місяців тому

    Am enjoying it rid on sir God will bless you

  • @MasterP-zj5ji
    @MasterP-zj5ji 8 місяців тому

    Nice one

  • @MaryannOnah
    @MaryannOnah 8 місяців тому

    Sir pls in question 39, lets say you are given a compound like C2H4 and you are told to find the percentage composition of Hydrogen . Will the formula be (H*4)/(C*2+H*4)

  • @hadimusa7370
    @hadimusa7370 10 місяців тому

    That's good 👍👍👍 sir

  • @Fortune-k7m
    @Fortune-k7m 10 місяців тому

    Well done sir

  • @Sniper_ff999
    @Sniper_ff999 8 місяців тому

    Please sir for no24. Where did the hydrogen and OH come from?

    • @MyschoolNigeria
      @MyschoolNigeria  8 місяців тому

      Is from water, the word aqueous means water as solvent.

  • @godfreyprogress3193
    @godfreyprogress3193 10 місяців тому

    Thanks sir

  • @NdulueDesmond
    @NdulueDesmond 8 місяців тому

    how do you solve question 30 pls teach me

    • @MyschoolNigeria
      @MyschoolNigeria  8 місяців тому

      In an alkene with six carbon atoms, there are 5 sigma (σ) bonds (single bonds) between the carbon atoms. Additionally, there are 4 pi (π) bonds associated with the double bonds between the carbon atoms.

  • @ChisomLawrence-qy3qe
    @ChisomLawrence-qy3qe 10 місяців тому

    You are too good

  • @adekolaroseline
    @adekolaroseline 8 місяців тому

    I didn't understand question 30
    How does alkene have 4 pi bonds

  • @princes-ss
    @princes-ss 10 місяців тому +1

    Thank you sir
    Please sir when is biology coming out

    • @MyschoolNigeria
      @MyschoolNigeria  10 місяців тому

      Stay tuned as we keep updating our videos.

  • @GloryUmukoro-gk5oy
    @GloryUmukoro-gk5oy 9 місяців тому

    I like your smile Sir 😊

  • @GiftMasefan
    @GiftMasefan 8 місяців тому +1

    Do you have like a WhatsApp group for jambites ??

    • @MyschoolNigeria
      @MyschoolNigeria  8 місяців тому

      Yes, click on this link myschool.ng/store/view/join-the-jamb-whatsapp-group

  • @ibenwapurity5913
    @ibenwapurity5913 8 місяців тому

    Please work on your app
    When i try to play past questions videos there it doesn't work and now it cant even open again 🙂💔

    • @MyschoolNigeria
      @MyschoolNigeria  8 місяців тому

      Videos are playing very well, please change your network provider and try again.

  • @MasterP-zj5ji
    @MasterP-zj5ji 8 місяців тому

    🎉🎉🎉

  • @OYENIRANROFIAT-t7b
    @OYENIRANROFIAT-t7b 8 місяців тому

    Sir i sent transferred money to activate my school and have not been given the activation code😢

    • @MyschoolNigeria
      @MyschoolNigeria  8 місяців тому

      We're on easter break, call our helplines from tuesday 9am.

  • @BlossomPatrick
    @BlossomPatrick 10 місяців тому +2

    Sir i installed my school app and is not giving me wat i wanted am disappointed 😢😢😢😢😢 questions are not up to date

    • @MyschoolNigeria
      @MyschoolNigeria  10 місяців тому +1

      Have you made been able to activate the app? if yes, kindly click on update questions and wait for it to update, then close the app and open it again. All our questions are up to date.
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    • @BlossomPatrick
      @BlossomPatrick 10 місяців тому

      @@MyschoolNigeria have activated the app and have also click on the update
      It does not have some topics in it

    • @MyschoolNigeria
      @MyschoolNigeria  10 місяців тому

      Please call our official helplines now for assistance.

    • @Gesi-ereSese
      @Gesi-ereSese 8 місяців тому

      Sir I downloaded the my school app but I find it hard to register, anytime I register the message I get is that the username is already taken, like that's my name oh but it's telling me another person is using it

    • @MyschoolNigeria
      @MyschoolNigeria  8 місяців тому +1

      We have millions of myschoolers, someone must have used that same name, kindly try using upper and lower case with numbers as your username.

  • @RiverHeights
    @RiverHeights 9 місяців тому +1

    I think question 24 is wrong. I believe the anode part is wrong Here is why
    Doesn't the rules for doesn't the rule for electrolysis of aqueous solutions say that, for the anode, if their is a halide present, it will be discharged.
    Since chlorine is a halide, it should be favored over oxygen. Sodium Hydroxide would then be formed. I believe A is the correct answer

    • @MyschoolNigeria
      @MyschoolNigeria  9 місяців тому +1

      Electrolysis of an aqueous solution involves applying a voltage to a dissolved ionic compound. The positive electrode is called the anode and is facilitates oxidation. At the positive electrode the anion will be discharged only if it is monoatomic and of high concentration. (Otherwise, oxygen gas is produced).

  • @oliviaEhimhen-Ebomese
    @oliviaEhimhen-Ebomese 8 місяців тому

    please i do not understand number 30

  • @daily-charge
    @daily-charge 10 місяців тому

    Sir, sorry but question 37.
    Distillation - used to separate mixtures with components of large difference in boiling point while,
    Fractional Distillation - mixtures with small difference in boiling point

    • @MyschoolNigeria
      @MyschoolNigeria  10 місяців тому +1

      Make more research on distillation and fractional distillation.

  • @YusufAbdullahi-zk2ev
    @YusufAbdullahi-zk2ev 10 місяців тому

    Sir u suppose to be marking the answers

  • @oluemmy574
    @oluemmy574 10 місяців тому +1

    Good morning Myschool!
    I made payment for 11 activation code. The payment was successfully and confirmation email was sent to me. I was unable to get the activation code no

    • @MyschoolNigeria
      @MyschoolNigeria  10 місяців тому

      Kindly call myschool helpline if you have sent us the payment details. Call Hours: 9am - 5pm (Mon - Fri)
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  • @IsraelAde-st2ds
    @IsraelAde-st2ds 9 місяців тому +1

    Love it sir, please how can i join your WhatsApp group?

    • @MyschoolNigeria
      @MyschoolNigeria  9 місяців тому

      Click on this link myschool.ng/store/view/join-the-jamb-whatsapp-group then tap on buy now, and follow the procedures.