2021 chemistry paper 2 and markigng guide
[PDF File]Mark scheme (A-level) : Paper 2 Organic and physical chemistry ...
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CHEMISTRY 7405/2 Paper 2 Organic and Physical Chemistry Mark scheme June 2021 Version 1.0: Final ... 3.2 Marking procedure for calculations ... MARK SCHEME – A-LEVEL CHEMISTRY – 7405/2 – JUNE 2021 5 3.5 Oxidation states In general, the sign for an oxidation state will be assumed to be positive unless ...
[PDF File]CHEMISTRY PAPER 2
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Section B Materials Chemistry Answer ALL parts of the question. 2. (a) Answer the following short questions : (D Explain why cellulose can absorb water but chitin cannot. (2 marks) (ii) Suggest one use of liquid crystal in daily life. (1 mark) (iii) A portion of the structure of natural rubber is shown below :,CH3 ch3 HC = C HC=C HC = C CH2 h2c (1) Draw the repeating unit of natural rubber.
[PDF File]KCSE TRIAL 2021 CHEMISTRY PAPER 2 - SCHOOLS NET KENYA
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Compiled & distributed by Schools Net Kenya, P.O. Box 15509-00503, Nairobi | Mob: 0734579299 E-mail: infosnkenya@gmail.com | ORDER ANSWERS ONLINE at www.schoolsnetkenya.com KCSE TRIAL 2021 CHEMISTRY PAPER 2 1. A few drops of sulphuric acid were added to four test-tubes containing cations as shown
[PDF File]Cambridge International AS & A Level - GCE Guide
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2(b) CO / it is a polar molecule / it has a (permanent) dipole (but N2 is non-polar) 1 2(c)(i) high temperature AND low pressure 1 2(c)(ii) M1 CO is polar / has a permanent dipole OR N2 is non-polar 1 M2 IMF in CO are (more) significant / larger OR IMF in N2 are smaller / less significant 1 Alternative answer
[PDF File]Chemistry marking guide and solution - Queensland Curriculum and ...
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2 CH 2 and COCH 3+ Fragment at m/z = 71 is CH 3 CH 2 CH 2 CO + Empirical formula = 86. This corresponds to the molecular mass shown on the mass spectrum. Therefore, the molecular formula is C. 5. H. 10. O. identifies IR peak at 1700–1750 a C=O bond in aldehyde or ketone [1 mark] •indicates that X is a ketone [1 mark] •identifies mass ...
[PDF File]0620 w21 ms 21 - GCE Guide
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CHEMISTRY 0620/21 Paper 2 Multiple Choice (Extended) October/November 2021 MARK SCHEME Maximum Mark: 40 Published This mark scheme is published as an aid to teachers and candidates, to indicate the requirements of the examination. Mark schemes should be read in conjunction with the question paper and the Principal Examiner Report for Teachers.
[PDF File]Chemistry marking guide and solution - ATAR CHEMISTRY FOR THE QCE
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Chemistry marking guide and solution . External assessment 2021 . Combination response (108 marks) Assessment objectives . This assessment instrument is used to determine student achievement in the following objectives: 1. describe and explain chemical equilibrium systems, oxidation and reduction, properties and
[PDF File]Chemistry marking guide and solution - Queensland Curriculum and ...
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Chemistry marking guide and solution Sample external assessment 2020 Science (125 marks) ... Paper 2 — Section 1: Short response Question Sample response The response 1 . a) 3 •identifies equilibrium reached 3 times [1 mark] b) No effect on the position of equilibrium.
[PDF File]Chemistry SEE marking guide - Queensland Curriculum and Assessment ...
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Chemistry SEE marking guide External assessment Queensland Curriculum & Assessment Authority 8 of 24 Q Sample response The response: M 4) c) Results indicate that titratable acidity decreases by approximately 0.9 g L –1 for each 1 °C increase in mean daily temperature. The correlation is quite strong, but reliability is
[PDF File]Chemistry marking guide and solution - Queensland Curriculum and ...
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Chemistry marking guide and solution External assessment 2021 Queensland Curriculum & Assessment Authority Page 4 of 13 Q Sample response The response: Notes 23b) Isoleucine is a non-polar amino acid. • The distance travelled by Spot A is similar to the distance travelled by isoleucine; therefore, Spot A is also non-polar.
[PDF File]0620 m21 ms 32 - GCE Guide
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These general marking principles must be applied by all examiners when marking candidate answers. They should be applied alongside the specific content of the mark scheme or generic level descriptors for a question. Each question paper and mark scheme will also comply with these marking principles. GENERIC MARKING PRINCIPLE 1: Marks must be ...
[PDF File]Cambridge O Level - GCE Guide
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2(b) steel making / welding / cutting metals / oxygen tents in hospitals / breathing apparatus / fuel cells 1 2(c)(i) same electronic structure / same electronic configuration 1 2(c)(ii) polonium-210 has one more neutron / polonium-209 has one less neutron / polonium-209 has 125 neutrons and polonium-
[PDF File]November 2021 Chemistry Standard level Paper 2
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2. The maximum mark for each question subpart is indicated in the “Total” column. 3. Each marking point in the “Answers” column is shown by means of a tick ( 7) at the end of the marking point. 4. A question subpart may have more marking points than the total allows.
[PDF File]0620 s21 ms 22 - GCE Guide
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CHEMISTRY 0620/22 Paper 2 Multiple Choice (Extended) May/June 2021 MARK SCHEME Maximum Mark: 40 Published This mark scheme is published as an aid to teachers and candidates, to indicate the requirements of the examination. Mark schemes should be read in conjunction with the question paper and the Principal Examiner Report for Teachers.
Waec Marking Scheme For Chemistry Paper 2
Chemistry Paper 2 Waec Marking Scheme For Chemistry Paper 2 Getting the books waec marking scheme for chemistry paper 2 now is not type of inspiring means. You could not without help going like book stock or library or borrowing from your contacts to entre them. This is an agreed easy means to specifically acquire guide by on-line. This online ...
[PDF File]Cambridge International AS & A Level - GCE Guide
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2(b)(iii) M1 (liquid) H2O molecules are held by stronger hydrogen bonding OR it takes more energy to break the hydrogen bonds between water molecules (in the liquid state) OR each water molecule forms two hydrogen bonds (whereas methanol can (only) form one per molecule
Marking Scheme Chemistry June 2013 Paper 2
Read Book Marking Scheme Chemistry June 2013 Paper 2 ... Archaeology, Anthropology, and Interstellar CommunicationStudent Study Guide and Solutions Manual to accompany Organic Chemistry 2e Binder Ready VersionFish and Fishery ... English Core, Physics, Chemistry & Mathematics (For 2021 Exam)Sterling Test Prep GRE Physics Practice ...
[PDF File]Paper 2 Organic and Physical Chemistry - MME
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CHEMISTRY 7404/2 Paper 2 Organic and Physical Chemistry . Mark scheme . June 2019 . Version 1.0 Final *196A74042/MS* MARK SCHEME – AS CHEMISTRY – 7404/2 – JUNE 2019 . 2 . ... 3.2 Marking procedure for calculations . Full marks should be awarded for a correct numerical answer, without any working
[PDF File]Cambridge International AS & A Level - GCE Guide
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These general marking principles must be applied by all examiners when marking candidate answers. They should be applied alongside the specific content of the mark scheme or generic level descriptors for a question. Each question paper and mark scheme will also comply with these marking principles. GENERIC MARKING PRINCIPLE 1: Marks must be ...
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