GCSE OCR Chemistry B Paper 2

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

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OCR Chemistry B Paper 2

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OCR Chemistry B Paper 2

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

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

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

Endothermic reaction graph

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

#5. What is the chemical symbol for radon?

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

#7. Complete the equation: H₂SO₄(aq) + ZnO(s) → …. + ….

Select all that apply:

#8. What is a simple molecular structure?

#9. Why does the temperature of a material stay constant during the transition from liquid to gas?

#10. If covalent bonds are very strong, then why does water have a low melting point?

#11. Is it possible to control the rate of reaction?

#12. What is the chemical symbol for hydrogen?

#13. What state of matter has particles which are close together and vibrate around fixed positions?

#14. Solutions of more than pH 7 are?

#15. Which of the following are strong acids?

Select all that apply:

exothermic reaction graph

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

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

#18. Determine the empirical formula for Cyanuric triazide – C₃N₁₂.

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

#20. After filtering a mixture containing sand, salt and water using filter paper. What do we call what is left in the filter paper?

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

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

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

#24. Solutions of less than pH 7 are?

#25. Why do simple molecules not conduct electricity?

#26. Are gases fluids?

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

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

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

#30. What is the chemical symbol for sulfur?

#31. Solutions of pH 7 are?

#32. What is the chemical symbol for gold?

#33. What is the charge of a proton?

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

Select all that apply:

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

#36. Which description best describes a compound?

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

#38. During a neutralisation reaction which salt is formed from sulfuric acid?

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

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

#41. What the the least dense state of matter?

#42. Which of the following are problems that would arise from measuring an extremely slow rate of reaction?

Select all that apply:

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

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

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

Select all that apply:

#46. Are metals usually malleable or brittle?

#47. What is the chemical symbol for calcium?

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

#49. Which of these is a problem with 3D ball and stick models?

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

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

Select all that apply:

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

#53. Complete the following equation: MgO (s) + H₂SO₄ (aq) → …. + ….

Select all that apply:

Neutralisation reactions follow the general structure –

metal oxide acid = salt water

the acid produces hydrogen ions and the metal oxide produces oxide ions – these combine to make the water

the salt is comprised of the remaining products – the metal and the other element from the acid

in this case, the other element is chlorine

The naming convention is to put the metal first for the salt created

#54. What are giant covalent structures?

#55. In which type of reaction would the temperature of a solution increase?

#56. When using inert electrodes to perform electrolysis with molten lead bromide, which products will be produced at the anode and cathode?

#57. A soluble base is called?

#58. What is the formula for nitric acid?

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

Select all that apply:

#60. Which of these best describes metallic bonding?

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

#62. What is the formula for hydrochloric acid?

#63. 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.

#64. What is the chemical symbol for magnesium?

#65. What is the chemical symbol for silver?

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

#67. What is the chemical symbol for lithium?

#68. Which of the following are weak acids?

Select all that apply:

#69. What is the relative mass of an electron?

#70. Complete the equation: HCl (aq) + KOH(s) → ….. + …..

Select all that apply:

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

#72. Which of these are common properties of giant covalent materials?

#73. Which of the following are effects of climate change?

Select all that apply:

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

#75. Which of these is a fast reaction?

#76. What method can we use to separate multiple types of liquids?

#77. What type of substance is pure gold (Au)?

#78. What is graphene?

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

#80. What are positive ions called?

#81. Which evidence provides information about carbon dioxide concentration and global temperatures?

#82. Which of these is a problem with dot and cross diagrams?

#83. Which description most accurately describes covalent bonding

#84. What is the chemical symbol for mercury?

#85. What is the chemical symbol for helium?

#86. How did the oceans form?

#87. Greenhouse effect 1) Fill in the blanks: Energy from the sun in the form of …….. hits the Earth’s surface and ……. are emitted back towards the atmosphere.

#88. What is the chemical symbol for carbon?

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

#90. 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.

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