2010
Sat
13
Nov
Little Miss Loi avatar

GCE O-Level 2010 Oct/Nov Combined Science (Physics/Chemistry/Biology) MCQ Paper 1 Suggested Answers & Solutions

(26)
Tuition given in the topic of Little Miss Loi the Science Tutor (archived) from the tuition centre desk of Little Miss Loi at 2:26 am (Singapore time)

While all of you (at least those of you who are not taking Bio on Monday) are out celebrating the end of your O Levels, I’m forced by my sister stuck at The Temple to finish up the solutions (along with the relevant explanations, where applicable) to the two combined science papers today :(

O-Level 2010 October/November Combined Science 5116 Paper 1 Suggested Solutions O-Level 2010 October/November Combined Science 5118 Paper 1 Suggested Solutions
2010 ‘O’ Level Oct/Nov Combined Science MCQ Paper 1 Suggested Solutions
Physics/Chemistry 5116 (left – Latest version: 1.1) & Chemistry/Biology 5118 (right – Latest version: 1.2) – click to download

It’s pretty late now so please leave a comment should you spot any mistake, and I’ll try my best to reply the growing list of comments over this weekend. What a cramped timetable we have this year *rubs panda eyes*

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26 Comments

  1. calvin's Avatar
    calvin says


    2010
    Nov
    13
    Sat
    4:53am
     
    1

    First to comment=) haha if yours answers are correct i will be glad with my results thanks very much!!!

  2. wei406015's Avatar
    wei406015 says


    2010
    Nov
    13
    Sat
    8:17am
     
    2

    why is question 38 for bio answer C ?

  3. ale's Avatar
    ale says


    2010
    Nov
    13
    Sat
    9:03am
     
    3

    Why not D for qn 21? By boiling it at 100 degrees, you know this subtance is pure. Then, by doing the copper sulfate test, you know that this pure substance has water in it. And since the substance is PURE, it has to contain only water so its pure water!

  4. wei5000's Avatar
    wei5000 says


    2010
    Nov
    13
    Sat
    11:30am
     
    4

    Why the answer is C.? For combined chem/bio q38

  5. Melvin's Avatar
    Melvin says


    2010
    Nov
    13
    Sat
    12:11pm
     
    5

    can we have pure chemistry mcq answer? A thousand thanks

  6. Sam's Avatar
    Sam says


    2010
    Nov
    13
    Sat
    12:44pm
     
    6

    For qn 21 can the answer be C...because pure water is neutral neither acidic nor alkaline. Although water freezes at 0 degrees...pure water being a neutral substance is'nt wrong either..could u check. Thanks..

    • LimCS- Sec4 Student's Avatar
      LimCS- Sec4 Student replied to Sam’s comment


      2010
      Nov
      13
      Sat
      2:35pm
       
      6.1

      @Sam: Hi Sam, there are also other compounds/mixtures like soluble salts that have pH 7 (neutral pH, that are neither acidic nor alkaline) .
      Hence, it is not the best answer :)
      And since it is given that it boils at 100 degrees, just simply reply the question that it freezes at 0 degrees. =D

      Am I right, Ms Loi ?

  7. QuestionMarksssss's Avatar
    QuestionMarksssss says


    2010
    Nov
    13
    Sat
    2:39pm
     
    7

    The only question I am not sure is qn. 12 ... :(

    I don't really understand the question. And why couldn't it be B ?

    Please reply !

  8. Passer's Avatar
    Passer says


    2010
    Nov
    13
    Sat
    3:10pm
     
    8

    can u poost pure chem mcq pls tq

  9. passerby's Avatar
    passerby says


    2010
    Nov
    13
    Sat
    4:07pm
     
    9

    Hi, plz post the pure chem mcq answers! Thanks! :)

  10. charrrr's Avatar
    charrrr says


    2010
    Nov
    13
    Sat
    5:45pm
     
    10

    Thanks for uploading the ans, Ms. Loi! Appreciate it v much. I've checked thru my ans, i guess i made quite a no. of careless mistakes. ): Anyway can you explain to me why the ans is D for Qsn 13(chem, phy)? Thanks!



  11. 2010
    Nov
    13
    Sat
    7:45pm
     
    11

    I've updated the 5118 Chemistry/Biology solutions (version 1.1) to correct an error in Q38 which should be D, as highlighted by wei406015 and wei5000.

    My bad for misreading the the question - we don't live in a planet with plants devouring herbivores! *looks at my garden with suspicion*

  12. wei406015's Avatar
    wei406015 says


    2010
    Nov
    13
    Sat
    8:21pm
     
    12

    however, i still wrong ... 35 only..

  13. Yoobin's Avatar
    Yoobin says


    2010
    Nov
    13
    Sat
    11:25pm
     
    13

    From the diagram for the answer to qn12, shouldn't incident rays from a distant object be (almost) parallel to the principal axis and that is why the refracted rays converge at the focal point at the other side of the lens?

  14. eric's Avatar
    eric says


    2010
    Nov
    14
    Sun
    7:20pm
     
    14

    Hi there, i have problems with opening the adobe, may u just give me the answer through microsoft word (attachment) or simply emailed me the answers for Combined Science Phy/Chem 5116/01 ? Thank you very much...

  15. Mp.'s Avatar
    Mp. says


    2010
    Nov
    15
    Mon
    9:24pm
     
    15

    Huh so is the answer for q1 B or D? The answer written there is D. But B implies that it only freezes at 0 deg which means that it is a pure substance cause it has only one melting point? Am I right?

  16. James's Avatar
    James  says


    2010
    Nov
    15
    Mon
    11:16pm
     
    16

    Hi, can you help post Pure Biology MCQ answers too? Thanks a million :]

  17. ah seng's Avatar
    ah seng says


    2010
    Nov
    16
    Tue
    4:15pm
     
    17

    hi do you know where can i get the answers for combined science 5116 paper 2 and 3? thanks a million

  18. student's Avatar
    student says


    2010
    Nov
    17
    Wed
    11:54pm
     
    18

    Hi there! May i ask why for q21 the answer is D? I agree with the previous post that it should be B. Thanks!

  19. Dan's Avatar
    Dan says


    2011
    Sep
    17
    Sat
    2:06am
     
    19

    Hmmm, thanks for the answers! :/ But how do I get the question paper? :S Been googling all night, to no avail.

    Thank youuu!

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