Tuesday, April 16, 2024
04:37 PM (GMT +5)

Go Back   CSS Forums > CSS Past Papers > CSS Papers (1971-2017) > CSS 2013 Papers
Chemistry Papers CE- 2013 Chemistry Papers CE- 2013

Reply Share Thread: Submit Thread to Facebook Facebook     Submit Thread to Twitter Twitter     Submit Thread to Google+ Google+    
Page 2 of 3 1 2 3
 
LinkBack Thread Tools Search this Thread
  #11  
Old Saturday, March 09, 2013
Nate's Avatar
Senior Member
Qualifier: Awarded to those Members who cleared css written examination - Issue reason: CE 2009 - Roll no 8236
  
Join Date: Oct 2009
Location: Quetta Balochistan
Posts: 164
Thanks: 201
Thanked 130 Times in 86 Posts
Nate is on a distinguished road
Default
Quote:
Originally Posted by Chintoo2010 View Post
Best of luck Nate for your last attempt

I left them altogether. I do not know about luminescence and gels. Knew little about gels. But i preferred not to say something wrong. So left them altogether. I was feeling like foot of an elephant on my chest when i had to leave these illogical and unjustified questions in the Organic Paper of CSS. He left all the organic and asked these sort of things.

What you answered about the three orbital thing in Part (a) of Question No. 2?
Thnx for your warm wishes my brother. Yup lets see what happens this time. Fingers crossed.
Anyways regarding that carbon p orbitals wala question. Well to be honest it was a straight bouncer by the examiner. Nonetheless i jus simply wrote amd drew the diagram showing why these three p orbitals r involved in hybridisation in a C atom n the electron being promoted frm 2s to a 2p orbital. Blah blah whatnot. Trust me it was indeeed a bouncer directed straight to the face.
__________________
Whats that Saying...Fortune Favors the Bold ...... Yeah right. Lucky me
Reply With Quote
  #12  
Old Saturday, March 09, 2013
Chintoo2010's Avatar
Senior Member
  
Join Date: Dec 2009
Location: Earth
Posts: 301
Thanks: 94
Thanked 270 Times in 131 Posts
Chintoo2010 will become famous soon enough
Arrow
No brother
It was not a bouncer it was a blow under the belt...........A carbon can never hybridize with p-orbitals only it must and should hybridize s orbital too as s-orbital is lower in energy than the p-orbital hence the question that why we use only 2p orbitals is wrong itself. Carbon can never hybridize without using s-orbital. It was an under the belt hit. He was asking Why on a wrong statement. I told him that Carbon always hybridizes using s-orbital first.


Also, i do not know the method by which a 2ndry alcohol oxidizes to an aldehyde. (As far as i know, 2ndry alcohol hybridizes to give ketone.
Reply With Quote
  #13  
Old Saturday, March 09, 2013
Roqayyah's Avatar
Senior Member
  
Join Date: Oct 2011
Location: Sargodha
Posts: 231
Thanks: 215
Thanked 189 Times in 102 Posts
Roqayyah has a spectacular aura aboutRoqayyah has a spectacular aura aboutRoqayyah has a spectacular aura about
Default
May be Fpsc made mistake in question of oxidation of secondary alcohol into aldehyde as I search this ketone is formed by secondary alcohol this is identification between primary, secondary and tertiary alcohol.
Reply With Quote
  #14  
Old Saturday, March 09, 2013
Nate's Avatar
Senior Member
Qualifier: Awarded to those Members who cleared css written examination - Issue reason: CE 2009 - Roll no 8236
  
Join Date: Oct 2009
Location: Quetta Balochistan
Posts: 164
Thanks: 201
Thanked 130 Times in 86 Posts
Nate is on a distinguished road
Default
Quote:
Originally Posted by Chintoo2010 View Post
No brother
It was not a bouncer it was a blow under the belt...........A carbon can never hybridize with p-orbitals only it must and should hybridize s orbital too as s-orbital is lower in energy than the p-orbital hence the question that why we use only 2p orbitals is wrong itself. Carbon can never hybridize without using s-orbital. It was an under the belt hit. He was asking Why on a wrong statement. I told him that Carbon always hybridizes using s-orbital first.


Also, i do not know the method by which a 2ndry alcohol oxidizes to an aldehyde. (As far as i know, 2ndry alcohol hybridizes to give ketone.
Agreeed it was deathly blow. N True that brother. Thats y i mentioned the s orbital electron being elevated to p orbital. I agreee with u to the whole hog.
N yes regarding secondary alcohols its always ketones. Even a candidate frm my centre objected to the superviser and made him call n check whether its right or wrong. But in the end it was said that its secondary alcohols so u guys have to ans its no typo error.
__________________
Whats that Saying...Fortune Favors the Bold ...... Yeah right. Lucky me
Reply With Quote
  #15  
Old Thursday, March 28, 2013
Ayesha Chemist's Avatar
Member
  
Join Date: Jan 2013
Posts: 40
Thanks: 76
Thanked 4 Times in 3 Posts
Ayesha Chemist is on a distinguished road
Default
what is Kuminisence ? I have never studied this term throught out my whole life . Do u mean luminisence. ?

Chintoo Insh Allah , Allah will bless u with success. Ameen
Reply With Quote
  #16  
Old Thursday, March 28, 2013
Junior Member
  
Join Date: Feb 2013
Location: wah cantt
Posts: 16
Thanks: 0
Thanked 2 Times in 2 Posts
restrain is on a distinguished road
Default
Quote:
Originally Posted by Ayesha Chemist View Post
what is Kuminisence ? I have never studied this term throught out my whole life . Do u mean luminisence. ?


yes. it is luminescence. and related to physical chemistry..
Reply With Quote
  #17  
Old Thursday, April 11, 2013
saddambajwa's Avatar
Junior Member
  
Join Date: Mar 2013
Location: LAHORE
Posts: 3
Thanks: 1
Thanked 0 Times in 0 Posts
saddambajwa is on a distinguished road
Default
yes its was a difficult paper but only part 2, organic chemistry included was a tougher one, and part 1 was just easily solved......
Reply With Quote
  #18  
Old Thursday, April 18, 2013
Junior Member
  
Join Date: Apr 2013
Location: Lahore
Posts: 3
Thanks: 2
Thanked 0 Times in 0 Posts
Naveed Khan Chhina is on a distinguished road
Default
First paper was easy................you just need to go the examination hall with clear concept and general understanding and gud observation you can solve this type of paper .................but for a crammer it's not easy to solve such kind of papers with 100 % accuracy
Reply With Quote
  #19  
Old Sunday, May 19, 2013
comp Engr's Avatar
Senior Member
  
Join Date: Jul 2007
Posts: 531
Thanks: 604
Thanked 267 Times in 198 Posts
comp Engr will become famous soon enough
Default
Salam roqayyah,

Kindly brief me passing marks to qualify in overall written examination.
__________________
God has sent us to do something special,Life is once for all but not to be Repeated by a pendulum.
Reply With Quote
  #20  
Old Tuesday, July 09, 2013
Last Island's Avatar
Royal Queen of Literature
Medal of Appreciation: Awarded to appreciate member's contribution on forum. (Academic and professional achievements do not make you eligible for this medal) - Issue reason: AppreciationBest Moderator Award: Awarded for censoring all swearing and keeping posts in order. - Issue reason: Best ModGold Medal: Awarded to those members with maximum number of reputation points. - Issue reason: For the year 2007, 2008, 2009, 2010, 2011Member of the Year: Awarded to those community members who have made invaluable contributions to the Community in the particular year - Issue reason: 2008Diligent Service Medal: Awarded upon completion of 5 years of dedicated services and contribution to the community. - Issue reason: More than 5 years of dedicated servicesModerator: Ribbon awarded to moderators of the forum - Issue reason:
 
Join Date: May 2005
Location: Forest of Fallen Stars
Posts: 7,585
Thanks: 2,427
Thanked 15,848 Times in 5,006 Posts
Last Island is headed toward stardomLast Island is headed toward stardomLast Island is headed toward stardomLast Island is headed toward stardomLast Island is headed toward stardomLast Island is headed toward stardomLast Island is headed toward stardomLast Island is headed toward stardomLast Island is headed toward stardomLast Island is headed toward stardomLast Island is headed toward stardom
Default


__________________
The Me you have always known, the Me that's a stranger still.
Reply With Quote
The Following User Says Thank You to Last Island For This Useful Post:
Roqayyah (Saturday, August 17, 2013)
Reply
Page 2 of 3 1 2 3

« Previous Thread | Next Thread »
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Chemistry Papers 2010 Last Island CSS 2010 Papers 3 Monday, January 12, 2015 06:14 PM
Chemistry Papers 2004 Last Island CSS 2004 Papers 1 Monday, June 08, 2009 11:53 PM
Chemistry Papers 2003 Last Island CSS 2003 Papers 1 Monday, June 08, 2009 11:53 PM
Chemistry Papers 2002 Last Island CSS 2002 Papers 1 Monday, June 08, 2009 11:52 PM
Chemistry Papers 2001 Last Island CSS 2001 Papers 1 Monday, June 08, 2009 11:51 PM

CSS Forum - Privacy Statement - Terms of Service - Top

CSS Forum on Facebook Follow CSS Forum on Twitter

Disclaimer: All messages made available as part of this discussion group (including any bulletin boards and chat rooms) and any opinions, advice, statements or other information contained in any messages posted or transmitted by any third party are the responsibility of the author of that message and not of CSSForum.com.pk (unless CSSForum.com.pk is specifically identified as the author of the message). The fact that a particular message is posted on or transmitted using this web site does not mean that CSSForum has endorsed that message in any way or verified the accuracy, completeness or usefulness of any message. We encourage visitors to the forum to report any objectionable message in site feedback. This forum is not monitored 24/7.

Sponsors: ArgusVision   vBulletin, Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.