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OCR_A level Chemistry_Marking Scheme 1_2020 | SPS F108 12.1_Carbonyl Compounds, Carboxylic Acids, Esters & Polyesters
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SPS F108 12.1_Carbonyl Compounds, Carboxylic Acids, Esters & Polyesters_A level_OCR_Chemistry_Marking Scheme 1 Carbonyl Compounds, Carboxylic Acids, Esters & Polyesters Mark Scheme 1 Level A Level Exam Board OCR Sub-Topic Time Allowed: 86 minutes Score: /71 Percentage: /100 Grade Boundaries: A* A B C D E U >85% 77.5% 70% 62.5% 57.5% 45% <45% Question Answer Mark Guidance 1 (a) (Relative) solubility (in stationary phase)  1 ALLOW how well...

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OCR_A level Chemistry_Marking Scheme 2_2020 | SPS F108 12.2_Carbonyl Compounds, Carboxylic Acids, Esters & Polyesters
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SPS F108 12.2_Carbonyl Compounds, Carboxylic Acids, Esters & Polyesters_A level_OCR_Chemistry_Marking Scheme 2 Carbonyl Compounds, Carboxylic Acids, Esters & Polyesters Mark Scheme 2 Level A Level Exam Board OCR Sub-Topic Time Allowed: 76 minutes Score: /63 Percentage: /100 Grade Boundaries: A* A B C D E U >85% 77.5% 70% 62.5% 57.5% 45% <45% Question Answer Mark Guidance 1 (a) monomers join/bond/add/react/form polymer/form chain AND anot...

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Test Bank for Nester’s Microbiology A Human Perspective 9th Edition by Anderson
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Test Bank for Nester’s Microbiology A Human Perspective 9th Edition by Anderson/ Test Bank for Nester’s Microbiology A Human Perspective 9th Edition by Anderson/ Test Bank for Nester’s Microbiology A Human Perspective 9th Edition by Anderson

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OCR_A level Chemistry_Marking Scheme 3_2020 | SPS F108 12.3_Carbonyl Compounds, Carboxylic Acids, Esters & Polyesters
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Carbonyl Compounds, Carboxylic Acids, Esters & Polyesters Mark Scheme 3 Level A Level Exam Board OCR Sub-Topic Time Allowed: 78 minutes Score: /65 Percentage: /100 Grade Boundaries: A* A B C D E U >85% 77.5% 70% 62.5% 57.5% 45% <45% Question er Mark Guidance 1 (a) (CH3CO)2O + CH3CH(OH)CH3  CH3COOCH(CH3)2 + CH3COOH ALLOW correct structural OR displayed OR skeletal formula ALLOW combination of formulae as long as unambiguous DO NOT ALLOW mole...

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