Followers

Wednesday, April 8, 2009

May Examination Paper 1

50 objective questions = 50marks = 25%

I've set the questions for you.

12 questions from chapter 2: mostly about nucleon no, proton no, nuetron no, electron configuration, heating and cooling of napthalene...

13 from chapter 3: lots of calculations, be ready in term of how to calculate the number of particles, number of molecules, moles, empirical formula, molecular formula...

12 from chapter 4: quite easy except for the equations... watch out for it!!

and 13 from chapter 5: hehe, here, its all about compounds, both ionic and covalent compound.. quite easy!
Posted by at

21 comments:

  1. c1ov3rApril 17, 2009 at 6:50 AM

    sob
    i got 3 marks on my objective in my last exam
    hahahahahahaha
    sobT.T

    ReplyDelete
  2. SimonApril 18, 2009 at 7:28 PM

    teacher,i have problem in balancing the equation oh...

    ReplyDelete
  3. SmiLe D''April 18, 2009 at 8:30 PM

    teacher,,i'm begging u don't give me 44 marks again okey..
    plezz..

    hihihik!!

    ReplyDelete
  4. ANTApril 27, 2009 at 4:37 AM

    haha... With so many balancing of equations lately, Simon do you still have problem? Andy, 44 is not 45!!! :D

    ReplyDelete
  5. ANTApril 27, 2009 at 4:47 AM

    Fe2O3 + H2SO4 Fe2(SO4)3 + H2O
    Let's make life easier by replacing SO4 with X:
    Fe2O3 + H2X Fe2X3 + H2O
    Now we can balance the equation fairly easily:
    Fe2O3 + 3 H2X Fe2X3 + 3 H2O
    Replacing X with SO4 gives the final equation:
    Fe2O3 + 3 H2SO4 Fe2(SO4)3 + 3 H2O

    ReplyDelete
  6. ANTApril 27, 2009 at 4:50 AM

    Balance this please:
    1. H2 + N2 --> NH3
    2. C3H8 + O2 --> CO2 + H2O
    3. Al + CuO --> Al2O3 + Cu
    4. I2 + Na2S2O3 --> NaI + Na2S4O6
    5. K2O + H2O --> KOH
    ALL DA BEST lols...

    ReplyDelete
  7. ANTApril 29, 2009 at 5:00 AM

    anybody there???? come on.. post ur answers ya...

    ReplyDelete
  8. vgsjzZang!April 30, 2009 at 7:42 PM

    1.3H2 + N2 ---> 2NH3
    2.2C3H8 + 10O2 ---> 6CO2 + 8H2O
    3.2Al + 3CuO --> Al0O3 + 3Cu
    4.2l2 + 2Na2S2O3 --> 4Nal + Na2S4O6
    5.K2O + H2O --> 2KOH

    ReplyDelete
  9. K e n n e t hMay 2, 2009 at 7:49 AM

    lol
    1. 3H2 + N2 -> 2NH3
    2. C3H8 + 5O2 -> 3CO2 + 4H2O
    3. 4Al + 6CuO -> 2Al2O3 + 6Cu
    4. I2 + 2Na2S2O3 -> 2NaI + Na2S4O6
    5. K2O + H2O -> 2KOH

    all correct ..?? HAHA

    ReplyDelete
  10. ANTMay 2, 2009 at 10:10 PM

    Here are the answers... nobody got all correct hehe
    1. 3H2 + N2 -> 2NH3
    2. C3H8 + 5O2 -> 3CO2 + 4H2O
    3. 2Al + 3CuO --> Al2O3 + 3Cu
    4. I2 + 2Na2S2O3 -> 2NaI + Na2S4O6
    5. K2O + H2O -> 2KOH

    ReplyDelete
  11. K e n n e t hMay 3, 2009 at 3:35 AM

    More question please

    ReplyDelete
  12. ANTMay 9, 2009 at 8:41 AM

    hehehe...will update questions soon

    ReplyDelete
  13. the ugLy oNeMay 10, 2009 at 5:39 AM

    teacher,i have problem in balancing the equation

    ReplyDelete
  14. the ugLy oNeMay 10, 2009 at 5:40 AM

    bingung..............

    ReplyDelete
  15. the ugLy oNeMay 10, 2009 at 5:46 AM

    help me teacher

    ReplyDelete
  16. ANTMay 11, 2009 at 3:41 AM

    rem, balancing equations is all about having the same number of atoms at both side of the equation... just try out many questions.. you'll soon understand

    ReplyDelete
  17. ANTMay 11, 2009 at 3:44 AM

    Hi there... here are some more a little complicated ones... hehe... TRY!!!
    1) When lithium hydroxide pellets are added to a solution of sulfuric acid, lithium sulfate and water are formed.

    2) When dirty water is boiled for purification purposes, the temperature is brought up to 1000 C for 15 minutes.

    3) If a copper coil is placed into a solution of silver nitrate, silver crystals form on the surface of the copper. Additionally, highly soluble copper (I) nitrate is generated.

    4) When crystalline C6H12O6 is burned in oxygen, carbon dioxide and water vapor are formed.

    5) When a chunk of palladium metal is ground into a very fine powder and heated to drive off any atmospheric moisture, the resulting powder is an excellent catalyst for chemical reactions.

    ALL DA BEST :D

    ReplyDelete
  18. Cc_LyaMay 15, 2009 at 12:39 AM

    teacher
    ~klo dlm bntuk ayatkn,,,
    ~sa ma c tia pandai tulis dia pnya equation...
    ~owh...

    ReplyDelete
  19. ANTMay 15, 2009 at 7:44 AM

    u have to slowly try... don't give up... in chemistry, converting word equation to symbols is very important

    ReplyDelete
  20. ANTMay 15, 2009 at 7:46 AM

    others... come on.. try lah bah

    ReplyDelete
  21. David JamesMarch 12, 2022 at 9:56 PM

    Apna Showroom Unisex Baby's Cotton Panties/Underwear Pack of 12 (Multicolored apsw_Baby_Panties for 0-3-6-12-18-24 months
    money chumbak financail planner investment retirement specialist gurgaon gurugram ncr delhi panipat,
    Baby Nail Cutter for New Born Nail Clipper | Nail Cutter for Infants Kids Baby Babies Stainless Steel with desent Look | Apna Showroom
    yeah i can understand level of your thinking and its ok for that

    ReplyDelete

Subscribe to: Post Comments (Atom)