Tollens reagent Studienführer, Klassennotizen & Zusammenfassungen
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AQA A-level CHEMISTRY Paper 2 Organic and Physical Chemistry QP 2020.
- Prüfung • 29 Seiten • 2022
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AQA A-level CHEMISTRY Paper 2 
Organic and Physical Chemistry 
QP2020. This question is about rates of reaction. 
Phosphinate ions (H2PO2 
– 
) react with hydroxide ions to produce hydrogen gas as 
shown. 
H2PO2 
– + OH− 
 → HPO3 
2– + H2 
A student completed an experiment to determine the initial rate of this reaction. 
The student used a solution containing phosphinate ions and measured the volume of 
hydrogen gas collected every 20 seconds at a constant temperature. 
Figure 1 shows ...
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CHEM 210- EXAM 1- CHAPTERS 10, 11, 12, 13, and 14 + QUIZZES /PP QUESTIONS AND ANSWERS
- Prüfung • 2 Seiten • 2023
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Im Paket-Deal erhältlich
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Choose the most CORRECT property of an organic compound. 
 
A) low boiling point 
B) high melting point 
C) conducts current 
D) flammable 
E) A and D 
Answer: E) A and D 
 
A) Low boiling point AND 
D) Flammable 
 
 
 
Which of the following compounds will have double bond(s) in it? 
 
A) octane 
B) heptyne 
C) benzene 
D) A and C 
E) A and B 
Answer: D) 
 
A)Octane AND 
C)Benzene 
 
 
 
What is the molecular formula of cyclohexane? 
 
A) C6H8 
B) C6H12 
C) C6H10 
D) C6H14 
Answer: B) C6H12 
 
...
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AQA A-level CHEMISTRY 7405/1 Paper 1Mark Scheme Inorganic and Physical Chemistry LATEST UPDATE 2024
- Prüfung • 32 Seiten • 2024
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Mark schemes are prepared by the Lead Assessment Writer and considered, together with the relevant questions, by a panel of subject teachers. This mark scheme includes any amendments made at the standardisation events which all associates participate in and is the scheme which was used by them in this examination. The standardisation process ensures that the mark scheme covers the students’ responses to questions and that every associate understands and applies it in the same correct way. 
As ...
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AQA A-level CHEMISTRY Paper 2 Organic and Physical Chemistry QP 2020.
- Prüfung • 29 Seiten • 2022
-
- 3,33 €
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AQA A-level CHEMISTRY Paper 2 
Organic and Physical Chemistry 
QP 2020.This question is about rates of reaction. 
Phosphinate ions (H2PO2 
– 
) react with hydroxide ions to produce hydrogen gas as 
shown. 
H2PO2 
– + OH− 
 → HPO3 
2– + H2 
A student completed an experiment to determine the initial rate of this reaction. 
The student used a solution containing phosphinate ions and measured the volume of 
hydrogen gas collected every 20 seconds at a constant temperature. 
Figure 1 shows ...
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AQA A-LEVEL CHEMISTRY 7405/2 PAPER 2 MARK SCHEME
- Prüfung • 37 Seiten • 2022
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- 13,83 €
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AQA A-LEVEL CHEMISTRY 7405/2 PAPER 2 MARK SCHEME 
 
 
 
 
 
 
 
 
 
 
 
A-level 
CHEMISTRY 
7405/2 
Paper 2 Organic and Physical Chemistry 
Mark scheme 
 
Version: 1.0 Final 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
*6A7405/2/MS* 
 
 
Mark schemes are prepared by the Lead Assessment Writer and considered, together with the relevant questions, by a panel of subject teachers. This mark scheme includes any amendments made at the standardisation events which all associates p...
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AQA A-LEVEL CHEMISTRY 7405/2 PAPER 2 MARK SCHEME
- Prüfung • 37 Seiten • 2022
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AQA A-LEVEL CHEMISTRY 7405/2 PAPER 2 MARK SCHEME 
 
 
 
 
 
 
 
 
 
 
 
A-level 
CHEMISTRY 
7405/2 
Paper 2 Organic and Physical Chemistry 
Mark scheme 
 
Version: 1.0 Final 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
*206A7405/2/MS* 
 
 
Mark schemes are prepared by the Lead Assessment Writer and considered, together with the relevant questions, by a panel of subject teachers. This mark scheme includes any amendments made at the standardisation events which all associates...
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HELP TO DEAL WITH ORGANIC CHEMISTRY
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his chapter introduces students to the organic compounds known as aldehydes and ketones, which are characterized by the carbonyl functional group (C=O). Here's an overview of what is usually covered in this chapter: 
 
Introduction to Aldehydes and Ketones: 
 
Aldehydes and ketones are organic compounds with a carbonyl group, which consists of a carbon atom doubly bonded to an oxygen atom. 
In aldehydes, the carbonyl group is at the end of the carbon chain, while in ketones, it is found within ...
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A-level CHEMISTRY 7405/2 Paper 2 Organic and Physical Chemistry
- Prüfung • 35 Seiten • 2023
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A-level 
CHEMISTRY 
7405/2 
Paper 2 Organic and Physical Chemistry 
3.2	Marking procedure for calculations 
Full marks should be awarded for a correct numerical answer, without any working shown, unless the question states ‘Show your working’ or ‘justify your answer’. In this case, the mark scheme will clearly indicate what is required to gain full credit. 
If an answer to a calculation is incorrect and working is shown, process mark(s) can usually be gained by correct substitution / wor...
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AQA A-level CHEMISTRY 7405-1 Paper 1 Inorganic and Physical Chemistry Mark scheme June 2023 Exams for Chemistry
- Prüfung • 29 Seiten • 2024
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Mark schemes are prepared by the Lead Assessment Writer and considered, together with the relevant 
questions, by a panel of subject teachers. This mark scheme includes any amendments made at the 
standardisation events which all associates participate in and is the scheme which was used by them in 
this examination. The standardisation process ensures that the mark scheme covers the students‟ 
responses to questions and that every associate understands and applies it in the same correct way. ...
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AQA A-LEVEL CHEMISTRY 7405/1 INORGANIC AND PHYSICAL CHEMISTRY MARKING SCHEME JUNE 2021 VERSION: 2.0 FINAL.
- Prüfung • 29 Seiten • 2023
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- 4,76 €
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For example, in a question requiring 2 answers for 2 marks: 
Correct 
answers 
Incorrect 
answers (ie 
incorrect rather 
than neutral) 
Mark (2) Comment 
1 0 1 
1 1 1 
They have not exceeded the maximum 
number of responses so there is no 
penalty. 
1 2 0 
They have exceeded the maximum number 
of responses so the extra incorrect 
response cancels the correct one. 
2 0 2 
2 1 1 
2 2 0 
3 0 2 The maximum mark is 2 
3 1 1 
The incorrect response cancels out one of 
the two correct responses that g...
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