Mock test. 1 hour and 45 minutes. 90 marks available.
Each time the test is taken it will present different questions.
GCSE OCR Chemistry Papers 1 and 3
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#1. Displacement reactions sometimes occur between a metal and a compound of a less reactive metal. Are these reactions endothermic or exothermic?
#2. Complete the following half equation for a reaction the cathode during electrolysis of molten zinc chloride. Zn²⁺ + ..... → Zn
#3. What do group 2 atoms do when they bond with group 6 atoms?
#4. What is the equation for Rf values in paper chromatography?
#5. Calcium nitrate contains the polyatomic ion NO₃⁻ (nitrate) and calcium. How many nitrate ions will be needed to make one molecule of calcium nitrate?
#6. In aqueous solutions such as sodium chloride solution, there will be positively charged ions from the salt (Na⁺) as well as hydrogen ions (H⁺). What is the rule that determines which will be discharged at the cathode.
#7. 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.
#8. What is a simple molecular structure?
#9. Calculate the relative formula mass of carbon monoxide (CO) to 2 decimal places. Carbon Aᵣ = 12, Oxygen Aᵣ = 16.
#10. When using inert electrodes to perform electrolysis with copper chloride solution, which products will be produced at the anode and cathode?
#11. What is the formula for the compound calcium nitrate which is made of calcium and nitrate ions (NO₃⁻)?
#12. Why is magnesium a better electrical conductor than sodium?
#13. Why are metals malleable?
#14. Which of these descriptions best describes fullerenes?
#15. Relative atomic mass used to have a different name. What was that name?
#16. Which of the following describes the Plum Pudding Model of atomic structure?
#17. Are non-metals usually good conductors of heat?
#18. What is the formula for the polyatomic ion carbonate?
#19. What state of matter has particles which are close together and move around each other?
#20. How many sulfur atoms will react with two lithium atoms to form an ionic compound?
#21. Do non-metals usually have a high or low melting point?
#22. Are gases fluids?
#23. Which of the following descriptions matches the term molecular formula?
#24. What is the symbol for relative atomic mass?
#25. What is the chemical symbol for magnesium?
#26. What is the formula for the polyatomic ion ammonium?
#27. What is the name of the phase change from gas to liquid?
#28. Determine the empirical formula for Cyanuric triazide - C₃N₁₂.
#29. Which description best describes mixtures?
#30. Which of these best describes metallic bonding?
#31. What are ions?
#32. Are non-metals usually shiny or dull in colour?
#33. What are giant covalent structures?
#34. What is a polymer?
#35. Is photosynthesis an endothermic or an exothermic reaction?
#36. What state of matter has particles which are close together and vibrate around fixed positions?
#37. 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.
#38. Which type of reaction is photosynthesis?
#39. Isotopes of atoms have different numbers of which particles?
#40. Which of these is a problem with metallic models?
#41. Which type of reaction takes in energy, making the surroundings cooler?
#42. Copper can be purified using electrolysis of copper sulfate solution. For this process we use the setup in the image below. Complete the half equation for the reaction at the anode. Cu → ..... + .....
#43. Strong acids do what in water? ? two words
#44. Determine the empirical formula of glucose - C₆H₁₂O₆.
#45. Fill in the blanks: Reduction refers to the ...... of electrons and it occurs at the ........
#46. Which of these is the stationary phase in paper chromatography?
#47. What is the formula for nitric acid?
#48. After filtering a mixture containing sand, salt and water using filter paper. What do we call what is left in the filter paper?
#49. What is the formula for the polyatomic ion sulfate?
#50. Reaction profiles are used to show the energy transfers during reactions. Which type of reaction is shown in this reaction profile?
#51. What is the freezing point of water?
#52. What temperature is the boiling point of water?
#53. What is the approximate radius of an atom?
#54. What is the formula for the polyatomic ion nitrate?
#55. Why does diamond not conduct electricity?
#56. Complete the equation: HCl (aq) + KOH(s) → ..... + .....
Select all that apply:
#57. This image shows the apparatus used during fractional distillation. What is function of the fractionating column?
#58. Which of the following things were hypothesised by John Dalton in 1805? ? select 4 answers
Select all that apply:
#59. What is the relative mass of a proton?
#60. What is the relative mass of an electron?
#61. Which description most accurately describes covalent bonding
#62. What type of substance is pure gold (Au)?
#63. Where is most of the mass of an atom?
#64. Complete the equation: H⁺(aq) + OH⁻(aq) → ....
Remember:
acids produce an excess of hydrogen ions
alkalis produce an excess of hydroxide ions
hydrogen ions and hydroxide ions come together to make water which is neutral.
#65. Complete the following equation describing a reaction with a metal and an acid: metal + acid → .... + ....
Select all that apply:
#66. What is the chemical symbol for oxygen?
#67. Which process can be used to separate water from dissolved salts, whilst keeping both substances?
#68. What method can we use to separate multiple types of liquids?
#69. In which sub-cellular structure inside plant cells does photosynthesis occur?
#70. Which of the following descriptions matches the term empirical formula?
#71. What is the balanced chemical equation for photosynthesis?
#72. What is the chemical symbol for copper?
#73. Ernest Rutherford fired positive particles at a thin gold foil and showed that most of atoms is empty space. Which particles did he fire at the gold foil?
#74. The table shows 3 substances and their melting points. Which types of substances could Y be?
Select all that apply:
#75. Which of the following are weak acids?
Select all that apply:
#76. Which of these is a problem with 3D ball and stick models?
#77. Complete the following half equation for a reaction the cathode during electrolysis of molten lead bromide. Pb²⁺ + 2e → .....
#78. Are non-metals usually good conductors of electricity?
#79. Match the following description to the correct term. X is a mixture made of dissolved substances in a liquid.
#80. Which description best describes a compound?
#81. What is the chemical symbol for silver?
#82. The graph shows a heating curve for substance X (red) and substance Y (blue). Is substance X a pure or impure substance?
#83. What is the name of the phase change from liquid to gas?
#84. If covalent bonds are very strong, then why does water have a low melting point?
#85. What is the approximate radius of a nucleus?
#86. Fill in the gap. Metal atoms bond forming a giant ......... of ions.
#87. Which of the following are uses for paper chromatography?
Select all that apply:
#88. What is the chemical symbol for chlorine?
#89. During a neutralisation reaction which salt is formed from hydrochloric acid?
#90. What is a solution called when it contains the maximum amount of solute that can dissolve in a solvent at a particular temperature?
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