Past 2017 top best forum
Today's Date
Nigeria free 2018 Gallery
9ja NOTICE: You are currently viewing this website as a Guest and are restricted from viewing some vital information. For more permissions on Earlyface.com.ng? Like posting Comments, Topics and Uploading contents without Verification And Moderator's approval. Fast loading and quick accessibility. Registration is required. Please Login or Register now to gain full access. It is fast and free!!

CLICK HERE NOW TO BECOME EARLYFACE MEMBER...


Author Topic: 2013/2014 NECO June/July Chemistry Alternative to Practical Questions And Answers  (Read 9169 times)

0 Members and 1 Guest are viewing this topic.

Offline MEGAX

  • VIP MEMBER
  • Earlyface VIP
  • *
  • Posts: 4402
  • Vote for me: +515/-80
  • Location: Abuja
2013/2014 NECO June/July Chemistry Alternative to Practical Questions And Answers

NOTE:The Below Answers has already been posted @ EarlyFace Examination Room for Only Registered members during Exam. You must first Register Or Login as an EarlyFace member to be able to gain access any of the Links in Order to get this 2013/2014 Real NECO Questions And Answers Free Of Charge.

Click Here To Read; How To Pay & Get All 2013 NECO Correct Solved Answers Direct To Your Phone As Text Messages (SMS).


For Online Free Answers Visit EarlyFace Examination Room;
Click Here To See 2013 NECO Physics Practical Real Questions And Answers Free Of Charge.

NECO Chemistry Practical;


(1a).table
rogh-24.00,0.00,24.00
1-23.50,0.00,23.50
2-25.50,2.00,23.50
3-27.50,4.00,23.50.
VA=23.50+23.50/3=70.50/3
VA=23.50

Equation for the reaction: 
2HY(aq)+Na2Co3(aq)-----2NaY(aq)+H2O(1)+CO2(g)

(1b).CAVA/CBVB=CA=?,CB=0.05
VA=23.50,VB=25
CA*23.50/0.05*25=2/1
CA*23.50*1=0.05*25*2
=2.5/23.50
CA=2.5/23.5
CA=0.106moldm^3.

(1bii).mass mgldm^3/1000
conc solution A in moldm^3
mass conc/molar mass
0.575/36.5
CA=0.02moldm^3

(2ai) tabulate
Observation: partially dissolve to give colourless filtrate and black residue
Inference: C is a mixture of soluble and insoluble salts
(2bi)
Observation: whire gelationous ppt
Inference: Zn ^z+ or Al^3+ likely present
(2bii)
Observation: white gelation ppt and ppt dissolve solube
Inference: Zn ^z+ or Al^3+ likely present
(2biii)
Obersation: Insoluble in dil. Hcl
Inference: Co3^-2, So4^2- is present
(2ci)
Observation: Residue dissolved to give a pale blue solution.
Inference: Cu^2+ present
(2cii)
Observation: ppt dissolves to give deep blue solution.
Inference: Cu^2+ conformation

(3)(a)
S is hydrogen sulphate(H2S),
T is Iron (III) sulphide
V is sulphur(IV) oxide

(3aii)It decolourizes the Solution

(3bi) 
Na2CO3 is soluble in water while NaHCO3 is insoluble in water 
Na2CO3 is a basic salt which changes red litmus paper to blu while NahCO3 is a acidic salt that changes blue litmus paper to read.
 
(3bii) Na2CO3 cannot be decomposed on heating while NaHCO3 can be decomposed on heating   
2NaHCO3(g)=>Na2CO3(aq)+H20+CO2(g)

Via: www.earlyface.com.n g
GOODLUCK!!...

REGARDS:
Earlyface Group Of Nig. (EGN)
========================
Dont forget to click the FACEBOOK SHARE LINK below, to share Information with Your Friends Who might need them.
   
To be getting all EarlyFace confirmed Updates (latest news in town, free browsing cheats, hottest FREEBIES, post-UTME tips, school matter and Exam stuff) for free through your Facebook and Twitter profile;
 
  • CLICK HERE to Like EARLYFACE on Facebook
  •  
  • CLICK HERE to Follow EARLYFACE on Twitter

  •    
    How To Create A Topic On Earlyface
     
    How To Create A Topic or Post On Earlyface as a Novice.

    Offline ebubeavoga

    • Young Earlyfacian
    • Posts: 1
    • Vote for me: +0/-0
    • Location: enugu state nigeria
    • HomeTown: nkanu
    i love the way this site is been moderate.

    Offline Solex

    • Young Earlyfacian
    • Posts: 1
    • Vote for me: +0/-0
    • Location: Benue
    • HomeTown: Ohimini
    help wit d chmistry specimen

    Offline Tallyboss

    • Young Earlyfacian
    • Posts: 4
    • Vote for me: +0/-0
    • Location: Jos
    • HomeTown: Ebo
    Haba oga brain abeg post the chem04 us na

    Offline sundaychristian

    • Young Earlyfacian
    • Posts: 3
    • Vote for me: +0/-0
    • Location: ibadan
    • HomeTown: oyo

     

    Related Topics


    Updated Topics

    NetContacts Membership Invitation by wedco893
    March 26, 2024, 06:42:58 pm

    NetContacts Membership Invitation by wedco893
    March 26, 2024, 06:26:58 pm

    CORRECT: 2024/2025 JAMB RUNS SUBSCRIPTION( REFORMED PACKAGES) by MANDINHO
    March 24, 2024, 09:11:15 pm

    UK FOOTBALL POOLS COUPON | 30TH MARCH 2024 | WEEK 39: X-02-X by wedco893
    March 24, 2024, 07:40:25 pm

    UK FOOTBALL POOLS COUPON | 23RD MARCH 2024 | WEEK 38: X-05-X by wedco893
    March 18, 2024, 06:52:10 pm

    Solve you've been logout for using unofficial Whatsapp app Gb Whatsapp problem by Wiz.gee
    March 16, 2024, 02:18:51 am

    Girls: Female's Education Ends In Kitchen by Babatunde aliyat
    March 12, 2024, 06:12:54 am


    FBLike US on Facebook.. TWFollow US on Twitter..

    Portal
    Forum
    RSS Feeds
    FAQ
    Members Intro
    Announcements
    Privacy Policy
    Terms Of Use
    Partners
    About Us

    Problem Solutions
    Global News
    Sports
    Celebs
    Politics
    Gists In Town
    General
    Song Lyrics
    Dating
    Religion

    Examination
    Post-UTME/Admission
    School News
    Online Reading
    Scholarship
    Education
    Entertainment
    Download Links
    Stories
    Fashion

    MTN NG
    9Mobile NG
    Airtel NG
    Glo NG
    World Networks
    Pc Tweaks
    Mobile Phone
    Computer Tips
    WebMaster
    Programming

    Browsing Cheats
    Net Tricks
    Health n Welfare
    Latest Jobs
    EarlyFace Group Of Nigeria © 2022