Comments on: O Level Chemistry Questions: Experimental Techniques / Purification & Separation http://www.simplechemconcepts.com/chemistry-questions/ O-Level Chemistry Made Easy Sat, 14 Jan 2012 03:43:17 +0000 hourly 1 http://wordpress.org/?v=3.0.4 By: arbish http://www.simplechemconcepts.com/chemistry-questions/comment-page-1/#comment-7803 arbish Sat, 07 Jan 2012 08:43:13 +0000 http://simplechemconcepts.com/2007/09/06/chemistry-questions/#comment-7803 hmmmmmmmmmm..................nice.......itz mostly sove my proble hmmmmmmmmmm………………nice…….itz mostly sove my proble

]]> By: Harshada Adel http://www.simplechemconcepts.com/chemistry-questions/comment-page-1/#comment-7750 Harshada Adel Mon, 14 Nov 2011 06:08:50 +0000 http://simplechemconcepts.com/2007/09/06/chemistry-questions/#comment-7750 Question 1:Fuels are associated with some ammount of Nitrogen in combination with sulfides.So on combustion it will give rise to oxides of Nitrigen and sulfur when it undergoes cobustion into carbon dioxide and methane..Also PAHs I.e poly aromatic hydrocarbons. Ans 2: Wet litmus paper can be used to test water-soluble gases; the gas dissolves in the water and the resulting solution colors the litmus paper. For instance, ammonia gas, which is alkaline, colors the red litmus paper blue. ANS 3:Pipette is used 4 transfer of small volumes.In this case Burette can be used because if we use pipette then 3 times we have 2 do tranferring.IT WILL INCLUDE ERROR..ALWAYS SHOULD FOLLOW A PATH WHICH WILL HAVE LESS NO. OF STEPS. Question 1:Fuels are associated with some ammount of Nitrogen in combination with sulfides.So on combustion it will give rise to oxides of Nitrigen and sulfur when it undergoes cobustion into carbon dioxide and methane..Also
PAHs I.e poly aromatic hydrocarbons.

Ans 2: Wet litmus paper can be used to test water-soluble gases; the gas dissolves in the water and the resulting solution colors the litmus paper. For instance, ammonia gas, which is alkaline, colors the red litmus paper blue.

ANS 3:Pipette is used 4 transfer of small volumes.In this case Burette can be used because if we use pipette then 3 times we have 2 do tranferring.IT WILL INCLUDE ERROR..ALWAYS SHOULD FOLLOW A PATH WHICH WILL HAVE LESS NO. OF STEPS.

]]> By: zainz http://www.simplechemconcepts.com/chemistry-questions/comment-page-1/#comment-7088 zainz Mon, 11 Oct 2010 14:13:42 +0000 http://simplechemconcepts.com/2007/09/06/chemistry-questions/#comment-7088 burette, caz' thatz more accurate and can even give the reading in points. in laboratories, mostly a burette is considered an appropriate instrument for adding acids. burette, caz’ thatz more accurate and can even give the reading in points.
in laboratories, mostly a burette is considered an appropriate instrument for adding acids.

]]> By: Unknown http://www.simplechemconcepts.com/chemistry-questions/comment-page-1/#comment-2456 Unknown Fri, 31 Jul 2009 08:47:18 +0000 http://simplechemconcepts.com/2007/09/06/chemistry-questions/#comment-2456 basically.. it's doing it 5 times instead of three .. and a burette is a much more accurate apparatus as compared to the pipette. The 25cm3 may be a little vague, resulting in a higher probability of having experimental errors :) basically.. it’s doing it 5 times instead of three .. and a burette is a much more accurate apparatus as compared to the pipette. The 25cm3 may be a little vague, resulting in a higher probability of having experimental errors :)

]]> By: alwaysLovely http://www.simplechemconcepts.com/chemistry-questions/comment-page-1/#comment-30 alwaysLovely Fri, 14 Sep 2007 03:02:00 +0000 http://simplechemconcepts.com/2007/09/06/chemistry-questions/#comment-30 Ans: Pipette. There is 125cm3 pipette to transfer the acid (analyte, etc) into the beaker for acid-base titration. Ans: Pipette. There is 125cm3 pipette to transfer the acid (analyte, etc) into the beaker for acid-base titration.

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