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ALL CIE CHEMISTRY DOUBTS HERE !!

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komailnaqvi:
Q.22 J10 p11
Both Alcohols are primary alcohols and so both will give same results with KmnO4, Na, and PCl5 while if you notice with Conc.H2so4 it is meant dehydration and hence two different reactions will take place one alcohol will go through dehydration while the other will not. hence
making B the Ans.

komailnaqvi:
P1 Nov02 Q1 Plz. Thanx.
and also in Q24 why cant it be 1-bromobutane???

Deadly_king:

--- Quote from: komailnaqvi on November 18, 2010, 09:36:10 am ---Q.22 J10 p11
Both Alcohols are primary alcohols and so both will give same results with KmnO4, Na, and PCl5 while if you notice with Conc.H2so4 it is meant dehydration and hence two different reactions will take place one alcohol will go through dehydration while the other will not. hence
making B the Ans.


--- End quote ---

Good explanation buddy :)

+rep

Deadly_king:

--- Quote from: komailnaqvi on November 18, 2010, 10:52:01 am ---P1 Nov02 Q1 Plz. Thanx.
and also in Q24 why cant it be 1-bromobutane???

--- End quote ---

Nov 02 p1
1. Write the balanced equations for the reactions.

CH4 + 2O2 -----> CO2 + 2H2O

C2H6 + 7/2O2 -----> 2CO2 + 3H2O

From 1st equation, 10 cm3 of methane will produce 10 cm3 of CO2 which is the only product absorbed by the alkali.

From 2nd equation, 10 cm3 of ethane will produce 20 cm3 of CO2.

So, in all 30 cm3 pf CO2 is produced.

Answer is C

24. It cannot be 1-bromobutane since upon oxidation the primary alcohol resulting from the first reaction will be oxidised into a carboxylic acid which does not have the same formula. ;)

moon:
Can someone please explain me nov.2008 q3,39 i need help in these questions can't gt them at all I would really appreciate in help.....thanx

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