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0620/42/F/M/21 -Q2 -solved.i
IGCSE chemistry topic wise solved questions and answers
The following link gives you access to IGCSE Solved Questions of Past Exam Papers. When We say " Solved" we mean Solved and we are not referring to " Mark Schemes". Many Websites sell mark Schemes and Say that They are providing you with Solved Past Exam Papers . Visit the following links to understand the quality of our services better.
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IGCSE Physics Solved Past Papers [ Solved Questions and Answers pdf] Paper Code 0625
Paper 2 Multiple Choice Paper [ Extended Syllabus] - Sample Copies
Paper 2-0625-Physics-May-June-2017-Solved.pdf
Paper 4 Structured Theory Paper [ Extended Syllabus] - Sample Copies
Paper-6-October-November-2018-physics-Solved-V-62.pdf
Paper 6 Alternative to Practical Paper [ Extended Syllabus] - Sample Copies
Paper-4-May-June-2017-physics-solved-v-42.pdf.pdf
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IGCSE Chemistry Solved Past Papers [ Solved Questions and Answers pdf] Paper Code 0620
Paper 2 Multiple Choice Paper [ Extended Syllabus] - Chemistry Sample Copies
0620_w18_qp_62-IGCSE-Chemistry-Solved-Past-Paper.pdf
Paper 4 Structured Theory Paper [ Extended Syllabus] - Chemistry Sample Copies
0620_w18_qp_42-IGCSE-Chemistry-Solved-Past-Paper.pdf
Paper 6 Alternative to Practical Paper [ Extended Syllabus] - Chemistry Sample Copies
0620_s18_qp_22-IGCSE-Chemistry-Solved-Past-Paper.pdf
If you like the above copies of solved past papers and want to buy more solved papers, then you have two buying options: Follow the links to know more]
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IGCSE Biology Solved Past Papers [ Solved Questions and Answers pdf] Paper Code 0610
Paper 2 Multiple Choice Paper [ Extended Syllabus] - Biology Sample Copies
Paper 4 Structured Theory Paper [ Extended Syllabus] - Biology Sample Copies
0610_s19_qp_42- IGCSE-Biology-Solved-Past-Paper-Questions-And-Answers.pdf
Paper 6 Alternative to Practical Paper [ Extended Syllabus] -Biology Sample Copies
0610_s19_qp_62-IGCSE-Biology-Solved-Past-Paper-Questions-And-Answers.pdf
If you like the above copies of solved past papers and want to buy more solved papers, then you have two buying options: Follow the links to know more]
- First option is to buy only the IGCSE Solved Past Papers for Biology [0610]
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Selected questions as per student requests have been solved in the following space
0620/42/F/M/21 -Q2 -solved Note: 2a belongs to topic :diffusion and 2(b) belongs to topic : air and water
Topic Diffusion solved past papers
Q2(a)The elements shown are gases at room temperature and pressure.
- hydrogen
- nitrogen
- oxygen
- chlorine
(a) State which one of these gases is green.
chlorine
(b) The gases shown exist as diatomic molecules. State the name of another element which has diatomic molecules and is a gas at room temperature and pressure.
fluorine
(c) When separate samples of each of these gases are placed in a container they will diffuse.
(i) Describe why these gases diffuse
Due to the random motion of molecules.
(ii) State which of these four gases has the highest rate of diffusion. Explain your answer.
Hydrogen because it has the lowest (relative) molecular mass
Topic Air and water solved past papers
(d) Nitrogen, oxygen and other substances are found in clean, dry air.
(i) State the percentage of nitrogen in clean, dry air.
78
(ii) Other than nitrogen and oxygen, identify another element found in clean, dry air.
argon
(iii) Identify a compound found in clean, dry air.
carbon dioxide
(iv) Nitrogen and oxygen can be separated from liquid air. State the name of this process.
fractional distillation