GCSE OCR Chemistry Papers 1 and 3

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OCR Chemistry A Papers 1 and 3

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OCR Chemistry A Papers 1 and 3

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#1. Which of the following are strong acids?

Select all that apply:

#2. What are positive ions called?

#3. What is the charge of an electron?

#4. What is the chemical symbol for iodine?

#5. Paper chromatography is used to separate which types of materials?

#6. Which types of atoms can be found in a pure piece of gold?

Select all that apply:

#7. What is graphene?

#8. Which process can be used to separate water from dissolved salts, whilst keeping both substances?

#9. Since metallically bonded atoms have a delocalised pool of electrons, these electrons are able to conduct ……

Select all that apply:

#10. Oxygen is in group 6 and fluorine is in group 7. How many fluorine atoms bond with one oxygen atom?

#11. Neutralisation reactions which occur between an acid and a base are always:

#12. Lead has 4 stable isotopes. ²⁰⁴Pb (abundance – 1.4%), ²⁰⁵Pb (abundance – 24.1%), ²⁰⁷Pb (abundance – 22.1%) and ²⁰⁸Pb (abundance – 52.4%). Calculate the Aᵣ of lead. Answer to 2 decimal places.

#13. What is the symbol for relative formula mass (also known as relative molecular mass)?

#14. What is the formula for nitric acid?

#15. True or false – Precipitation reactions can be either exothermic or endothermic.

#16. Which of the following are 3 of the adaptations of leaves for efficient photosynthesis?

Select all that apply:

Remember to carefully read the question, if you selected Root hair cells, you were mistaken because the question asked about leaves, not roots.

#17. What is the chemical symbol for mercury?

#18. What is the name of the phase change from solid to liquid?

#19. What is the formula for the polyatomic ion nitrate?

#20. Why did Ernest Rutherford’s experiments with gold foil demonstrate that most of atoms consists of empty space?

#21. What is the chemical symbol for carbon?

#22. The table shows 3 substances and their melting points. What common substance, in particular, could substance Z be?

#23. Which of the following are uses for paper chromatography?

Select all that apply:

#24. What is the chemical symbol for iron?

#25. Which of the following are properties of ionic compounds?

#26. How do sodium and chlorine atoms bond? ? you might need a periodic table to answer this question

#27. Can Rf values be higher than 1?

#28. What is the chemical symbol for chlorine?

#29. During a neutralisation reaction which salt is formed from hydrochloric acid?

#30. What are negative ions called?

#31. Are metals usually good conductors of electricity?

#32. What is a simple molecular structure?

#33. Why is magnesium a better electrical conductor than sodium?

#34. What the the most dense state of matter?

#35. Do non-metals usually have a high or low density?

#36. How many sulfur atoms will react with two lithium atoms to form an ionic compound?

#37. Fractional distillation is used to separate which types of materials?

#38. What is a solution called when it contains the maximum amount of solute that can dissolve in a solvent at a particular temperature?

#39. Do metals usually have a high or low density?

#40. What state of matter has particles which are close together and move around each other?

#41. Which of the following describes the Plum Pudding Model of atomic structure?

#42. When using inert electrodes to perform electrolysis with water acidified with sulfuric acid, which products will be produced at the anode and cathode?

#43. What is the formula for the compound calcium nitrate which is made of calcium and nitrate ions (NO₃⁻)?

#44. Complete the equation: NaOH(aq) → Na⁺(aq) + ….

#45. What is the relative mass of a neutron?

#46. Can strong and weak acids have the same pH?

#47. Relative atomic mass used to have a different name. What was that name?

#48. Complete the following equation describing a reaction with a metal and an acid: metal + acid → …. + ….

Select all that apply:

#49. What is the chemical symbol for silver?

#50. What is the name of the phase change from liquid to gas?

#51. Why does diamond not conduct electricity?

#52. Filtration and crystallisation are used to separate which types of materials?

#53. What is the formula for sulfuric acid?

#54. Which of the following are the 4 factors that affect the rate of photosynthesis?

Select all that apply:

#55. What state of matter has particles which are far apart and move around independently?

#56. Complete the following equation describing a neutralisation reaction with a metal oxide: metal oxide + acid → …. + ….

Select all that apply:

#57. What is the chemical symbol for helium?

#58. Why is diamond hard?

#59. What is the chemical symbol for nitrogen?

#60. Determine the empirical formula for Cyclopentane – C₅H₁₀?

#61. What temperature is the boiling point of water?

#62. What is the approximate radius of an atom?

#63. What are ions?

#64. What are giant covalent structures?

#65. What do group 2 atoms do when they bond with group 6 atoms?

#66. What is the chemical symbol for fluorine?

#67. What type of substance is carbon dioxide (CO₂ )?

#68. Which of these is the mobile phase in paper chromatography?

#69. What is the chemical symbol for hydrogen?

#70. Which of the following things were hypothesised by John Dalton in 1805? ? select 4 answers

Select all that apply:

#71. Where is most of the mass of an atom?

fractional distillation diagram

#72. This image shows the apparatus used during fractional distillation. What is function of the fractionating column?

#73. What is the chemical symbol for sodium?

#74. In aqueous solutions such as sodium chloride solution, there will be negatively charged ions from the salt (Cl⁻) as well as hydroxide ions (OH⁻). What is the rule that determines which will be discharged at the anode.

#75. What is the chemical symbol for sulfur?

#76. The melting point of gallium is 29.8˚C and the boiling point is 2204˚C. What state is gallium at 25˚C?

#77. Which type of reaction takes in energy, making the surroundings cooler?

#78. What do we use fullerenes for?

#79. In 1897 JJ. Thomson did a series of experiments that led to the discovery of which particles?

#80. Complete the following half equation for a reaction the cathode during electrolysis of molten zinc chloride. Zn²⁺ + ….. → Zn

#81. Which of these is the stationary phase in paper chromatography?

#82. What is the formula for the polyatomic ion carbonate?

#83. Calculate the relative formula mass of carbon monoxide (CO) to 2 decimal places. Carbon Aᵣ = 12, Oxygen Aᵣ = 16.

#84. Is water an example of a covalent compound?

#85. In which sub-cellular structure inside plant cells does photosynthesis occur?

#86. Fill in the blanks: Oxidation refers to the …… of electrons and it occurs at the ……..

#87. Which of the following was the Rutherford Model of atomic structure?

#88. What is the chemical symbol for lithium?

#89. What is the formula for hydrochloric acid?

#90. During Ernest Rutherford’s experiments with gold foil, why did some of the particles bounce back?

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