GCSE OCR Chemistry B Paper 2 Automarked

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

#2. What is the formula for sodium hydroxide?

HNO₃

KOH

Ca(OH)₂

H₂SO₄

HCL

NaOH

#3. What is the formula for the polyatomic ion ammonium?

NH₄⁺

OH⁻

NO₃⁻

SO₄²⁻

CO₃²⁻

SO₃²⁻

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

2

1

3

#5. Which description best describes an element?

contains only one type of atom

contains more than one type of atoms, chemically bonded together

contains more than one type of atoms, but not chemically bonded together

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

Select all that apply:

Lower pH of oceans due to dissolving carbon dioxide producing carbonic acid

Rising sea levels due to ice in the south pole and in glaciers melting

Extinctions of species unable to migrate or adapt to higher temperatures

More extreme weather events (stronger storms, rainfall and droughts)

Rising ocean temperatures causing coral bleaching and other adverse effects

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

Rate of reaction is highest at very high and very low temperatures

As temperature increases, rate of reaction increases

As temperature increases, rate of reaction decreases

#8. 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 → ….. + …..

SO₃²⁻ + 2e

Cu²⁺ + 2e

Cu⁺ + e

#9. Solutions of less than pH 7 are?

alkaline

neutral

acidic

#10. Which steps can we take to reduce the impact of climate change on humanity or prevent further climate change?

Select all that apply:

Building flood defences

Using renewable energies instead of fossil fuels

Cutting down forests to give humans a new place to live

Ensuring clean water supplies for vulnerable communities

Carbon capture from the atmosphere and storage underground

Pumping water to the Sahara Desert and creating a new place to live

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

Shiny

Dull

#12. 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.

Carbon dioxide, methane and water vapour

Carbon dioxide, oxygen and water vapour

Carbon dioxide, water vapour and nitrogen

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

Cathode: Bromine (Br₂) (g) Anode: Lead (Pb) (s)

Cathode: Lead (Pb) (s) Anode: Bromine (Br₂) (g)

Cathode: Hydrogen (H₂) (g) Anode: Lead (Pb) (s)

#14. Are non-metals usually good conductors of heat?

Yes

No

#15. What is the chemical symbol for lithium?

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

Select all that apply:

seawater

aquifers

lakes

rivers

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

1 x 10⁻³

1 x 10⁻¹⁵

1 x 10⁻¹⁰

1 x 10⁻³

#18. Do non-metals usually have a high or low melting point?

High

Low

#19. What is a simple molecular structure?

Ionically bonded substances such as sodium bromide

a giant structure where each atom has a covalent bond to its neighbour

a compound which contains atoms covalently bonded together, but with weak intermolecular forces between molecules

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

the temperature is not relevant to states of matter

the particles are breaking the bonds with surrounding particles - this takes energy

the particles are figuring out what to do

#21. What is the chemical symbol for gold?

#22. Will exothermic reactions continue if there is no energy input?

No, even if reactants have not run out

Yes, until reactants run out

#23. True or false. All atoms of the same element have the same atomic number.

False

True

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

saturated

flaccid

dilute

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

Low

High

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

Electrons

Alpha particles

Protons

Neutrons

#27. What is the equation for Rf values in paper chromatography?

distance moved by solvent / distance moved by spot

distance moved by solvent x distance moved by spot

distance moved by spot / distance moved by solvent

#28. Acids produce an excess of what when they dissolve in water?

hydrogen ions

carbonate ions

sulfate ions

hydroxide ions

#29. Which of these best describes metallic bonding?

Metal atoms share their electrons in order to fill their electron shells, this causes an attraction between the positive nuclei and shared electrons.

Metal atoms lose their electrons to a delocalised pool and all of the metal ions are mutually attracted to the delocalised pool, holding all of the ions together.

Metal atoms lose their electrons to non-metal atoms which then creates positive and negative ions which are attracted by electrostatic attraction.

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

yes

not sure

no

#31. What is the chemical symbol for calcium?

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

With lower surface area to volume ratio, objects are much hotter and travel faster

With higher surface area to volume ratio, the overall temperature of reactants is lower, this leads to increased collision impact when struck

With higher surface area to volume ratio, there is more surface where collisions can take place

#33. Which type of reaction is aerobic respiration?

Endothermic

Ectothermic

Mesothermic

Exothermic

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

C₄N₄

CN₄

CN

C₂N₄

#35. Calculate the relative formula mass of copper oxide (CuO) to 2 decimal places. Copper Aᵣ = 63.5, Oxygen Aᵣ = 16.

#36. Why does diamond not conduct electricity?

Because it has no delocalised electrons

Because it has a very high resistance

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

C₂OH

CH₂O

CHO₂

C₂H₂O

#38. What evidence supports the notion that human activities are contributing to climate change?

Gradual climate warming has occurred since the evolution of our species

Correlation between increases in atmospheric temperatures and historic releases of greenhouse gases, due to combustion of fossil fuels

#39. What is the formula for calcium hydroxide?

KOH

HNO₃

Ca(OH)₂

HCL

H₂SO₄

NaOH

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

Mainly water vapour, some oxygen, little or no carbon dioxide and small amounts of other gases

Mainly oxygen, some water vapour, little or no carbon dioxide and small amounts of other gases

Mainly carbon dioxide, some water vapour, little or no oxygen and small amounts of other gases

#41. Which of the following descriptions matches the Mᵣ of a compound?

The mean mass of an atom compared with carbon-12

The simplest whole number ratio of atoms

The sum of the relative atomic masses of all of the atoms or ions in its formula

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

Select all that apply:

mixture

element

compound

#43. A soluble base is called?

a biscuit

an antacid

an alkali

#44. What is the chemical symbol for helium?

#45. 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 cathode. Cu²⁺ + 2e →

Cu

CuO

SO₄²⁻

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

Select all that apply:

tripod

filter paper

a beaker

filter funnel

a bunsen burner

an evaporating basin

gauze

a heatproof mat

#47. What is the approximate radius of a nucleus?

1 x 10⁻³

1 x 10⁻⁴

1 x 10⁻¹⁵

1 x 10⁻⁵

#48. What is the mass number of an element?

the total number of subatomic particles in an atom

the number of protons plus neutrons

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

78% oxygen, 21% nitrogen, 0.9% argon, and 0.1% other gases

78% nitrogen, 21% oxygen, 0.9% argon, and 0.1% other gases

78% carbon dioxide, 21% oxygen, 0.9% argon, and 0.1% other gases

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

Reactant particles at higher temperatures move more quickly, collide more often and with enough energy to react

Reactant particles at lower temperatures are struck by rapidly moving electrons, causing the reaction to happen faster

Reactant particles are unaffected by temperature, but the bonds at higher temperatures become weaker leading to an increased rate of reaction

#51. Solutions of more than pH 7 are?

neutral

alkaline

acidic

#52. Which of the following items would you need to perform filtration?

Select all that apply:

gauze

filter funnel

an evaporating basin

a beaker

a bunsen burner

a tripod

filter paper

#53. What do we use fullerenes for?

nanoelectronics, delivery of medicines within the body and strengthening tennis racket frames

as fuel in high performance internal combustion engines and in electric car batteries

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

Select all that apply:

trace amounts of other elements

gold atoms

carbon atoms

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

Select all that apply:

identifying substances by comparing chromatogram patterns to patterns formed by known substances

separating insoluble solids

determining the boiling point of a substance

identifying substances by calculating Rf values

distinguishing between pure and impure substances

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

distilled water is warmer so it is better for conducting chemical analysis

distilled water is cheaper than tap water

tap water contains small amounts of dissolved salts which could contaminate the results

#57. Chemical reactions require a high enough collision energy for reactions to take place. What do we call the minimum amount of energy needed for a reaction?

Reactionary energy

Activation energy

The Introactive energy minimum

PR energy

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

carbonate

chloride

nitrate

borate

sulfate

#59. Are non-metals usually good conductors of electricity?

Yes

No

#60. What is the freezing point of water?

66.5˚C

25˚C

30˚C

0˚C

55˚C

100˚C

#61. H₂SO₄(aq) + Na₂O(s) → …. + ….

Select all that apply:

H₂O (l)

MgOH

NaOH

Na₂SO₄(aq)

2H₂O (l)

#62. Which of the following descriptions matches the term molecular formula?

Represents the simplest integer ratio of atoms or ions of each element in a compound

Is the sum of the relative atomic masses

Represents the actual number of atoms of each element in a molecule

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

The model shows the atoms as being too far apart and there are no sticks

The model does not show that the ions will be constantly vibrating

They do not show how the structure formed and suggest that the electrons in different atoms are different, but they are actually the same

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

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

separating soluble compounds

separate different types of liquids

separate soluble materials from insoluble materials

#66. Which type of reaction transfers energy to the surroundings?

Endothermic

Mesothermic

Exothermic

#67. What is the formula for the polyatomic ion sulfate?

OH⁻

SO₃²⁻

CO₃²⁻

NH₄⁺

SO₄²⁻

NO₃⁻

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

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

solids

liquids

plasma

gases

#70. Which of the following are strong acids?

Select all that apply:

sulfuric acid

hydrochloric acid

carbonic acid

boric acid

nitric acid

ethanoic acid

#71. Which scientist proposed the Plum Pudding Model?

Ernest Rutherford

JJ. Thomson

John Dalton

#72. What is the chemical symbol for hydrogen?

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

Select all that apply:

H₂O (l)

HO (l)

MgSO₄ (aq)

MgS (g)

MgS₂

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

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

CH₄

2CH

C₂H₂

CH₂

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

Carbon dioxide escaped the atmosphere as the Earth's spin increased in speed, causing an increase the centrifugal force

Carbon dioxide dissolved into the oceans and sea organisms used carbon in their shells as calcium carbonate

Carbon dioxide was split by photolysis, producing pure carbon which rained down as a solid.

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

separate soluble materials from insoluble materials

separating soluble compounds

separate different types of liquids

#77. Fill in the gap. Metal atoms bond forming a giant ……… of ions.

Lettuce

Anchor

Lattice

Ball

#78. In an experiment to measure the rate of photosynthesis of pondweed in a test tube, the number of bubbles (oxygen) produced per minute is used to determine the rate of reaction. What is this experiment actually measuring?

The mass of the reactants of the reaction

The concentration of the products of the reaction

The volume of the products of the reaction

The mass of the products of the reaction

The volume of the reactants of the reaction

#79. What is the charge of a proton?

0

-1

+1

#80. What is the chemical symbol for nitrogen?

#81. Match the following description to the correct term. X is a mixture made of dissolved substances in a liquid.

solute

solvent

solution

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

High energies cause spontaneous rearrangement of particles without impacts between them

High collision energies are more likely to break chemical bonds

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

Select all that apply:

Electricity

Sound

Heat

Electromagnetic waves

#84. When a mixture of rocks, salt and water is filtered, what will be the residue?

sand

salt

rocks

water

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

Select all that apply:

H₂SO₄ (aq)

H₂SO₄ (l)

H₂O (l)

HZnO₄ (s)

ZnSO₄ (aq)

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

A central nucleus containing protons and neutrons, surrounded by electrons at discrete energy levels (shells)

A mass of positively charged material with negatively charged electrons distributed throughout it

#87. What is the formula for potassium oxide? ? you might need a periodic table to answer this question

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

Select all that apply:

do not conduct electricity

high melting/boiling points

are good conductors of electricity

low melting/boiling points

#89. 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?

Slow

Fast

GCSE OCR Chemistry B Paper 2

Good Luck!

Results

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

#2. What is the formula for sodium hydroxide?

#3. What is the formula for the polyatomic ion ammonium?

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

#5. Which description best describes an element?

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

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

#8. 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 → ….. + …..

#9. Solutions of less than pH 7 are?

#10. Which steps can we take to reduce the impact of climate change on humanity or prevent further climate change?

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

#12. 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.

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

#14. Are non-metals usually good conductors of heat?

#15. What is the chemical symbol for lithium?

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

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

#18. Do non-metals usually have a high or low melting point?

#19. What is a simple molecular structure?

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

#21. What is the chemical symbol for gold?

#22. Will exothermic reactions continue if there is no energy input?

#23. True or false. All atoms of the same element have the same atomic number.

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

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

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

#27. What is the equation for Rf values in paper chromatography?

#28. Acids produce an excess of what when they dissolve in water?

#29. Which of these best describes metallic bonding?

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

#31. What is the chemical symbol for calcium?

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

#33. Which type of reaction is aerobic respiration?

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

#35. Calculate the relative formula mass of copper oxide (CuO) to 2 decimal places. Copper Aᵣ = 63.5, Oxygen Aᵣ = 16.

#36. Why does diamond not conduct electricity?

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

#38. What evidence supports the notion that human activities are contributing to climate change?

#39. What is the formula for calcium hydroxide?

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

#41. Which of the following descriptions matches the Mᵣ of a compound?

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

#43. A soluble base is called?

#44. What is the chemical symbol for helium?

#45. 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 cathode. Cu²⁺ + 2e →

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

#47. What is the approximate radius of a nucleus?

#48. What is the mass number of an element?

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

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

#51. Solutions of more than pH 7 are?

#52. Which of the following items would you need to perform filtration?

#53. What do we use fullerenes for?

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

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

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

#57. Chemical reactions require a high enough collision energy for reactions to take place. What do we call the minimum amount of energy needed for a reaction?

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

#59. Are non-metals usually good conductors of electricity?

#60. What is the freezing point of water?

#61. H₂SO₄(aq) + Na₂O(s) → …. + ….

#62. Which of the following descriptions matches the term molecular formula?

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

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

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

#66. Which type of reaction transfers energy to the surroundings?

#67. What is the formula for the polyatomic ion sulfate?

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

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

#70. Which of the following are strong acids?

#71. Which scientist proposed the Plum Pudding Model?

#72. What is the chemical symbol for hydrogen?

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

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

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

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

#77. Fill in the gap. Metal atoms bond forming a giant ……… of ions.