GCSE OCR Chemistry B Paper 1

Mock test. 1 hour and 45 minutes. 90 marks available.

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OCR Chemistry B Paper 1

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OCR Chemistry B Paper 1

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

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

#3. How could we accurately monitor the rate of a reaction? ? Three answers

Select all that apply:

#4. 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 → ….. + …..

#5. Complete the equation: HCl (aq) → H⁺(aq) + …..

#6. Why is graphite softer than diamond?

#7. Which of the following are strong acids?

Select all that apply:

#8. Why may our attempts to mitigate the effects of climate change cause further damage to the environment?

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

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

#11. What is the formula for calcium hydroxide?

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

#13. Can compounds be pure, for example, carbon dioxide?

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

#15. Which of the following items would you need to perform crystallisation by heating? ? 6 items

Select all that apply:

#16. Why is there a minimum energy required for reactions to occur?

#17. What is the formula for hydrochloric acid?

#18. Fill in the blanks: Electrolysis is a process in which ………. energy from a ………. current supply is used to decompose electrolytes.

#19. Does increasing the pressure of gases increase the rate of reaction?

#20. How could you separate a mixture of sand and salt?

#21. Why did the concentration of carbon dioxide in the atmosphere decrease after the oceans formed?

#22. What is the chemical symbol for sodium?

#23. Temperature affects the rate of reaction. Which of the following is the correct description of what happens when temperature changes?

#24. What is the name of the process by which salt is removed from water?

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

Select all that apply:

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

#27. Determine the empirical formula of glucose – C₆H₁₂O₆.

#28. Are metals usually good conductors of electricity?

#29. Why do we use distilled water for chemical analysis?

#30. What does the atomic number of an element mean?

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

Select all that apply:

#32. Which of the following examples matches the composition of Earth’s early atmosphere?

#33. Which scientist proposed the Plum Pudding Model?

#34. Which geological process formed Earth’s atmosphere?

#35. Greenhouse effect 2) Fill in the blanks: Greenhouse gases such as ……….. , …………. and ……….. absorb infrared radiation from the Earth and re-emit it back to the Earth’s surface, causing warming.

#36. Which of these are common properties of simple molecular (covalent) materials?

Select all that apply:

#37. What is a polymer?

#38. What is a simple molecular structure?

#39. What is the relative mass of a proton?

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

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

Select all that apply:

#42. Which of the following are the main sources of drinking water in the UK?

Select all that apply:

#43. What is the current composition of the Earth’s atmosphere?

#44. Reaction profiles are used to show the energy transfers during reactions. Which type of reaction is shown in this reaction profile?

#45. What is the chemical symbol for nitrogen?

#46. Why is diamond hard?

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

#48. What is the formula for sodium hydroxide?

#49. What is the chemical symbol for iodine?

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

#51. What is the chemical symbol for carbon?

#52. Why is a spark often needed to start a combustion reaction?

#53. During a neutralisation reaction which salt is formed from nitric acid?

#54. What is the formula for the polyatomic ion hydroxide?

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

#56. What is the chemical symbol for hydrogen?

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

#58. Are metals usually shiny or dull in colour?

#59. On the early Earth, there was a lot of volcanic activity as the planet was cooling down. How can we link this to the formation of the atmosphere?

#60. When using inert electrodes to perform electrolysis with sodium chloride solution, which products will be produced at the anode and cathode?

#61. What is the electronic configuration of a nitrogen atom? ? you might need a periodic table to answer this question

#62. What is the chemical symbol for fluorine?

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

#64. The graph shows a heating curve for substance X (red) and substance Y (blue). Is substance Y a pure or impure substance?

#65. What is the name of the phase change from gas to solid?

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

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

#68. Because mixtures contain more than one substance and each has its own melting point, mixtures melt in which way?

#69. Which type of reaction is aerobic respiration?

#70. What is the chemical symbol for lithium?

#71. Why do both graphite and diamond have high melting points?

#72. Are non-metals usually shiny or dull in colour?

#73. Iron is turned into iron oxide when exposed to the air. This is a process also known as rusting. Is the rate of reaction fast or slow in rusting?

#74. Which of the following are commonly used as methods of sterilising fresh water? ? 3

Select all that apply:

#75. Isotopes of atoms have different numbers of which particles?

#76. How did the oceans form?

#77. What is the chemical symbol for mercury?

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

#79. What is the chemical symbol for calcium?

#80. The table shows 3 substances and their melting points. Which types of substances could Y be?

Select all that apply:

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

#82. What is the name of the apparatus used for distillation?

#83. The graph shows a heating curve for substance X (red) and substance Y (blue). Is substance X a pure or impure substance?

#84. Calculate the relative formula mass of water. Hydrogen Aᵣ = 1, Oxygen Aᵣ = 16.

#85. What is the formula for potassium hydroxide?

#86. How many atoms of potassium (group 1) are needed to bond ionically with oxygen (group 6)?

#87. During crystallisation, there is a risk of spitting which could cause harm. Which of the following could reduce the risk?

Select all that apply:

#88. A paper chromatography experiment is carried out in a lab. The distance moved by the spot was 6cm and the solvent had moved by 8cm. Calculate the Rf value.

#89. Which of these reasons explains why temperature affects rate of reaction?

#90. Surface area to volume ratio affects rate of reaction. Why is that the case?

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