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chemistry p12 discussion !!
- Thread starter ying27kia
- Start date
2. The following eqns the letters W X Y Z all represent wholo numbers. When correctly balanced, which equ requires one of the letters W X Y Z to be 5?
A. W c3H7COOH+ X O2---> Y CO2+ Z H2O
B W C4H8+ X O2---> Y CO2 + H2O
C W H3PO4+ X NaOH---> Y Na2HPO4+Z H2O
D. WNH3+XO2+ Z H2O
3. From which particle is the removal of an electron most difficult?
Cl- F- K+ Na+
39 Which compounds will produce CH3COOH when boiled under reflux with dilute OH- followed by acidification?
CH3CH2Cl
CH3COOCH3
CH3CN
A. W c3H7COOH+ X O2---> Y CO2+ Z H2O
B W C4H8+ X O2---> Y CO2 + H2O
C W H3PO4+ X NaOH---> Y Na2HPO4+Z H2O
D. WNH3+XO2+ Z H2O
3. From which particle is the removal of an electron most difficult?
Cl- F- K+ Na+
39 Which compounds will produce CH3COOH when boiled under reflux with dilute OH- followed by acidification?
CH3CH2Cl
CH3COOCH3
CH3CN
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wow you remember the entire question of no. 2 :Bravo:
i did C for 2.
then Na+
and then A for the third ? i think.
i did C for 2.
then Na+
and then A for the third ? i think.
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- 87
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most of my friends got that too. think A 's right for 2.
hmn... and the question about the non metallic element in fuels, that oxidises and stuff ?
it was one of the last questions. do you remember it ?
i put D for that.
hmn... and the question about the non metallic element in fuels, that oxidises and stuff ?
it was one of the last questions. do you remember it ?
i put D for that.
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anahita16 said:
Okayy... I think I made a mistake there too.
But the question I was referring to was actually the other one , that Feroz answered.
Thanks , anyways
huh? question was about Mg being the fuel n Ba(NO3)2 the oxidising agent. N2 wasn't among the options, where did that spring from?!
unless ur talking about another question, which i fnk is the case. it's not fuels it's in the car engine. i put B(again!) i misread the question for this one n got statement 2 correct. it is D. Another mark of mine gone...
haha just read ur post above but im too lazy to change mine.
unless ur talking about another question, which i fnk is the case. it's not fuels it's in the car engine. i put B(again!) i misread the question for this one n got statement 2 correct. it is D. Another mark of mine gone...
haha just read ur post above but im too lazy to change mine.
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guys !!!! have u all noticed that the last questions (31-40) were answered D mostly... I dont know why but I got 5 D's...
- Messages
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anahita16 said:
I was also in a shortage of time and I hurriedly answered those....
OMG same YAYYYY.Feroz said:A is right for question 2. It was 5O2.
For the question about the non metallic element in fuels, that oxidises and stuff, the element was nitrogen, and I wrote D too.
For question 39, I wrote C, that is CH3COOCH3 and CH3CN.
the answe is B. It came in the previous years as well.anahita16 said:ying27kia said:
Whatever...there are lots of stuff i dont understand. just grasp the concept on the whole n get the mark. i dont like chemistry that's y i dont bother too much abt it.