you got 10/15mzduxx2006 said:hm well i have my multiple choice question sheet with the answers i submitted on the day. dont know if they are right. hope atleast one of them is aniways my following answers were...keep in mind they probly arent RIGHT :
CORRECT ANSWERS= 0/15
Forbidden. said:1. A - No doubt - Ethanol can be renewed as it is the only one that sources energy from the sun in the process.
2. D - No doubt - Glucose monomers polymerise into cellulose and water.
3. B - No doubt - The electrons flow from anode (losing electrons) to cathode (gaining elctrons) via external wire (salt bridge transports ions)
4. C - There were 7 carbons and you count the -OH from the lower end (3 not 5).
5. D - Magnesium and Lead are the furthest apart on the standard potentials table.
6. C - All others are acidic or neutral.
7. D - No doubt - Neutralisation is an exothermic reaction and only choice D matches the energy profile.
8. C - A stonger acid should have a lower pH than a weaker acid of the same concentration.
9. A - No doubt - Sodium citrate is the only one formed from a strong base and weak acid.
10. D - I know I'm wrong - After using the dilution equation I should have used 900mL - 90mL = 810mL
11. B - No doubt - Ca2+ and Mg2+ are primarily responsible for hardness.
12. A - Water seems to be formed in all combustion reactions whether it is complete or not.
13. A - Decreasing the pressure favpours the reverse reaction and the only true statement there is that heat will be absorbed as opposed to the heat released in the forward exothermic reaction.
14. D - This is the only viable option as AAS is accurate and relies on the absorption spectra not continuous or emission.
15. B - From textbooks I recall that Chlorine's presence helps catalyse the destruction of ozone.
Originally I said: "4. C - I know I'm wrong - I thought there were 7 carbons."
I'm not wrong, the structure is an isomer of Heptan-3-ol even though the terminal carbon appears to be a methyl bond.
D, same here LOL, what a stupid mistake.pires_w said:1A
7C <--- I've asked my teacher...I put D though =[
10C <--- I put D, what a stupid mistake...lol
Exactly, C looks like the conductivity vs. volume of acid/base added to a solution in a titration experiment when you stick the conductivity probe in.Armenikum said:7 is c?
how is that an exo reaction?
I think I muffed up badly in many parts ...cuffed said:my mc answers:
hope I didn't colour the bubbles wrongly x|
according to Forbidden's answers, I should have gotten full marks then. lolol. first time ever. too bad i screwed up the rest of the paper </3