• We need your support!

    We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
    Click here to Donate Now (View Announcement)

chem p12...hmm that was a tough one !!!

Messages
175
Reaction score
13
Points
28
No it was D
imnt 4 da 40th question
im 100 percent sure
ill tell u the reason also
if some one ask me :p
 
Messages
41
Reaction score
0
Points
0
@ sannikutti if u were refering to me then can u plz explain how its D i think i misread the question due to limited time :(
 
Messages
58
Reaction score
0
Points
0
the ans to 40 was C as Ca carries plus 2 and dioic means it has 2 carboxyl groups at each end 2 and 3 were crct
wht was the ans to 31 in whch water was added to make the acid dilute??
 
Messages
175
Reaction score
13
Points
28
EzioAuditre said:
the ans to 40 was C as Ca carries plus 2 and dioic means it has 2 carboxyl groups at each end 2 and 3 were crct
wht was the ans to 31 in whch water was added to make the acid dilute??
what was the compound formula you tell me
 
Messages
286
Reaction score
4
Points
0
Q 40 , i thought the first option was wrong and choosed C automatically without even reading the other options (and due to limited time was forced to guess few questions , which i left in the beginning , hhhh..)
 
Messages
175
Reaction score
13
Points
28
look till i remember
the compund was CaC2h....
so which one gives this
carboxilic acid 4 sure
and then butan-di-oic acid
gives Ca2C4h....
which if u take emperical formula ull get CaC2h....
back
now i guessed the compund
becouze im asking the compound formula and no one is telling me
But third compound
was 1,2 dimethyle propanedioic acid
which is impossible
then it will have 5 carbon
if u remember the question tell me tough pls
 
Messages
19
Reaction score
0
Points
0
grumpy said:
yaro i need help q 36 of may june 08.
i still dont understand why the nitrogen is not considered to be oxidised.
similar question came in the todays paper.36 When the yellow liquid NCl3 is stirred into aqueous sodium hydroxide, the reaction that occurs
can be represented by the following equation.
2NCl3(l) + 6NaOH(aq) → N2(g) + 3NaCl (aq) + 3NaOCl (aq) + 3H2O(l)
What will be the result of this reaction?
1 The nitrogen is oxidised.
2 A bleaching solution remains after the reaction.
3 The final solution gives a precipitate with acidified silver nitrate.

C is the answer..check the marking scheme..!! and in our ppr it was the precipitate one..!! =)
 
Messages
175
Reaction score
13
Points
28
some body to tell me compund
how much was the number of carbon
limonxter
u know
or EzioAuditre
pls
cuz i need clear some thing
 
Messages
41
Reaction score
0
Points
0
the compound was not CaC2H something it was with 4 carbons thats why i eliminated ethanoic acid as it only has two carbons
 
Top