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Michael L. Bishop, Edward P. Fody, Carleen Van Siclen • ISBN 9781284238860
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A electrochemistry test for students who need to review.
ELABORATED OCR A-LEVEL CHEMISTRY PAPER 2 2024 (EXAM QUESTIONS AND ANSWERS) 
What is an alkene and its general formula? - CORRECT ANSWER-It is an unsaturated hydrocarbon with a least one C=C bond. General formula is CnH2n 
 
What is a sigma bond? σ - CORRECT ANSWER-single covalent bond formed when two s orbitals overlap. High electron density 
 
What is a pi bond? - CORRECT ANSWER-sideways overlap of p orbitals that occur in a double or triple bond. Much weaker than sigma, low bond enthalpy...
ADVANCED OCR CHEMISTRY PAPER 2 EXAM QUESTIONS AND ANSWERS 
describe the structure of Benzene - CORRECT ANSWER-• a cyclic hydrocarbon with 6 carbon, and 6 hydrogen atoms. 
• the bond angle and shape around each carbon is 120' trigonal planar. 
• each C has 4 outer shell electrons; 
 
- 3 of these bond to 2 other carbon atoms, and 1 to a hydrogen atom. - these form a Sigma bond. - a fourth outer shell electron in the 2p orbital is left behind above and below the planes of the carbon a...
COMPELETE SOLUTIONS FOR OCR ALEVEL CHEMISTRY EXAM QUESTIONS 
What is needed to carry out "heating under reflux"? - CORRECT ANSWER-Equipment: Vertical condenser (clamps etc), Pear-shaped flask, antibumping granules, grease/vaseline and a heat source 
*Antibumping granules*-used to make the liquid boil calmly and prevent bumping, bubbles and liquid from being expelled. 
*Vaseline*-Makes the join airtight and prevents them from freezing in certain reactions 
 
How do you carry out "heating ...
chemical process safety Questions and answers latest update
Chemical Process Safety Quiz 2 Questions and answers latest update 
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Chemical Process Safety Questions and answers latest update
0	1	This question is about ethanedioic acid (HOOCCOOH) and the 
ethanedioate ion (−OOCCOO−). 
 
0	1	. 1	Ethanedioic acid reacts with propane-1,3-diol (HOCH2CH2CH2OH) to form a polyester. 
 
Draw the repeating unit of this polyester. 
[2 marks] 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
0	1	. 2	Explain why polyesters are biodegradable but polyalkenes are not biodegradable. 
[2 marks] 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
0	1	 
. 3	 
Sodium ethanedioate is used to find the concentration of solutions of potassium ...
This question is about ethanedioic acid (HOOCCOOH) and the ethanedioate ion (−OOCCOO−). 
 
.	Ethanedioic acid reacts with propane-1,3-diol (HOCH2CH2CH2OH) to form a polyester. 
 
Draw the repeating unit of this polyester. 
[2 marks] 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
.	Explain why polyesters are biodegradable but polyalkenes are not biodegradable. 
[2 marks] 
 
 
 
 
 
 
 
 
 
 
 
 
 
.	Sodium ethanedioate is used to find the concentration of solutions of potassium manganate(VII) by titration. ...
GCSE CHEMISTRY 8462/2F Paper 2 Foundation Tier