GAMSAT Section III Chemistry - Part 2

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Chemistry - Part 2

Chemistry - Part 2

Your score:

Average score:

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Speed as well as accuracy is important in this section. Work quickly, or you might not finish the paper. There are no penalties for incorrect responses, only marks for correct answers, so you should attempt all questions. Each question is worth one mark.

You must complete the answers within the time limit. Calculators are NOT permitted.

Good Luck!

Maxwell distribution plot

Image reference: https://homepages.abdn.ac.uk/j.s.reid/pages/Maxwell/Legacy/MaxDistrb.html

1. Which gas has the sharpest rise in probable speed?

A. CO₂ at 0°

B. O₂ at 0°

C. O₂ at 127°

D. All are equal

Explanation

The correct answer is A.

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Maxwell distribution plot

Image reference: https://homepages.abdn.ac.uk/j.s.reid/pages/Maxwell/Legacy/MaxDistrb.html

2. Which gas has the greatest probable speed at 600 velocity?

A. CO₂ at 0°

B. O₂ at 0°

C. O₂ at 127°

D. Both O₂ are equal.

Explanation

The correct answer is C.

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Maxwell distribution plot

Image reference: https://homepages.abdn.ac.uk/j.s.reid/pages/Maxwell/Legacy/MaxDistrb.html

3 What is the peak probable speed of O2 at 0°?

A. 0.04

B. >0.04

C. <0.04

D. 0.39

Explanation

The correct answer is B.

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Maxwell distribution plot

Image reference: https://homepages.abdn.ac.uk/j.s.reid/pages/Maxwell/Legacy/MaxDistrb.html

4. What does the graph indicate about oxygen?

A. It has a higher RMM compared to CO2

B. It is faster than CO2

C. It has a higher temperature than O2

D. O2 has a higher kinetic energy compared to CO2

Explanation

The correct answer is A.

Post Comment

Charlotte Medicmind Tutor

Fri, 12 Aug 2022 08:01:47

I think this answer is wrong?

Big dick Medicmind Tutor

Sun, 29 Oct 2023 05:54:25

Y’all crackers be trippin

Raoult’s law

Psolution = Xsolvent x Psolvent

P solution = vapour pressure of solution

X solvent = mole fraction of solvent

P solvent = vapour pressure of solvent

5. What is the vapor pressure of a solution at 25°C containing 300.0 grams of substance A (MM = 150 g/mol) in 500 grams of water? The vapor pressure of this water is 25 mm Hg and the MM = 10.00 g/mol. Round to the nearest whole number as you work through the equation.

A. 20mmHg

B. 25mmHg

C. 10mmHg

D. 15mmHg

Explanation

The correct answer is B.

Moles of water: 500g/10.00g/mol = 50 moles

Moles of substance A: 300g/150g/mol = 2 moles

50 moles/(50 + 2) moles = 0.96 moles. This is the mole fraction of the solvent. Round to 1

Now enter this into Raoult’s law: 1 x 25 = 25mmHg

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Solubility

6. Which of the following compounds would not form a precipitate when added into a saturated solution of potassium nitrate?

A. KOH

B. Ag₂SO₄

C. NH₄NO₃

D. Hg₂(NO₃)₂

Explanation

The correct answer is B.

Any compound containing nitrogen or potassium would form a precipitate.

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Solubility

Use the graph below to answer the following questions.

7. Which of the following describes the solubility of NaNO₃?

A. The compound is insoluble at a temperature of 0.

B. The compounds solubility is temperature dependant.

C. The compound is highly dissolvable at low temperatures.

D. The compound is only partially soluble in water.

Explanation

The correct answer is C.

From the graph it is clear that this is a highly soluble compound and does not need a high temperature to boost its solubility.

Post Comment

unistudent Medicmind Tutor

Tue, 31 Aug 2021 15:33:16

This question is incorrect. The graph clearly shows a temperature dependence of the solubility of NaNO3. Phrases such as "highly dissolvable" can be considered true however B is a much more scientifically correct statement.

Hyoshin Medicmind Tutor

Wed, 26 Oct 2022 14:46:28

I agree with unistudent, B is objectively more valid based solely on the graph.

Solubility

Use the graph below to answer the following questions.

8. How much KCl is soluble at a temperature of 60C?

A. 50g

B. 45g

C. 40g

D. 38g

Explanation

The correct answer is B.

Candidates should read the graph carefully.

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Solubility

Use the graph below to answer the following questions.

9. Which of the following statements are true?

A. Ce₂(SO₄)₃ has the lowest degree of solubility.

B. NH₃ is always less soluble than NaNO₃.

C. At 20C KNO₃ has 35g solubility.

D. NaCl has lower solubility than Pb(No₃)₂.

Explanation

The correct answer is D.

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Phase diagrams

Using the above phase diagram of helium answer the following questions.

10. At what temperature range does helium exist as He-II, gas and solid?

A. 1.5-2K

B. 2K

C. 1K

D. They do not co-exist

Explanation

The correct answer is A.

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Phase diagrams

Using the above phase diagram of helium answer the following questions.

11. At what pressure range does Helium exist as a solid?

A. ~10 atm

B. ~100 atm

C. ~30 atm

D. ~50 atm

Explanation

The correct answer is C.

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Phase diagrams

Using the above phase diagram of helium answer the following questions.

12. At 1atm what states does helium exist as?

A. Liquid He-II, Liquid He-I

B. Liquid He-I, Liquid He-II, Gas

C. Gas, solid and He-II

D. Solid, both liquids and gas

Explanation

The correct answer is B.

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Phase diagrams

Using the above phase diagram of helium answer the following questions.

13. Are solid and gaseous helium able to exist simultaneously?

A. Yes

B. No

C. Yes if temperature is kept below 3 K

D. Yes if temperature is kept between 1.5 and 3 K

Explanation

The correct answer is B.

Candidates should read the graph carefully to answer these questions, no prior knowledge is needed.

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Periodic table

Image reference: https://en.wikipedia.org/wiki/Periodic_table

14. Which is true regarding effective nuclear charge?

A. Increases as you go across the table, decreases as you move down.

B. Increases as you go across the table, increases as you move down.

C. Decreases as you go across the table, decreases as you move down.

D. Decreases as you go across the table, increases as you move down.

Explanation

The correct answer is A.

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Periodic table

Image reference: https://en.wikipedia.org/wiki/Periodic_table

15. Which of the following will have the greatest electronegativity charge?

A. Be

B. B

C. Nh

D. Ra

Explanation

The correct answer is A.

Electronegativity increases moving across and decreases moving down the table.

Post Comment

unistudent Medicmind Tutor

Tue, 31 Aug 2021 15:36:06

Assuming this question wasn't written by the actual GAMSAT examiners, the phrase 'electronegativity charge' is incorrect. It is not a charge, but a relative value describing the tendency of a nucleus to attract the bonding pair of electrons in a covalent bond.

student Medicmind Tutor

Mon, 28 Feb 2022 12:35:59

B is more electronegative than Be

Periodic table

Image reference: https://en.wikipedia.org/wiki/Periodic_table

16. Which of the following statements regarding transition elements is untrue?

A. Formation of coloured ions.

B. Incomplete delta sub-level.

C. Variable oxidation states.

D. Low and unstable melting points.

Explanation

The correct answer is D.

Transition metals have high melting points.

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Thermodynamics

17. On heating a solution a temperature increase is noted over a period of time. Which of the following statements is most accurate for characterising the solution during this period?

A. The solution has reached boiling point

B. The solution is undergoing a phase change

C. The velocity of the molecules in the solution is increasing

D. The temperature increase of the solution is proportional to the vaporisation that occurs.

Explanation

The correct answer is C.

A substance can absorb heat and use to either increase its temperature or undergo a phase change. As temperature has been increasing over a period of time we can rule out B. We cannot know that the solution is at boiling point so this can also rule out A and D. As temperature increases the velocity of the molecules also increases.

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Thermodynamics

18. What will happen if this solution continues to be heated for another half hour?

A. Boil and evaporate

B. Molecule velocity continues to increase, a maximum of velocity may be reached.

C. The solution switches from increasing molecule velocity to boiling and phase change.

D. The solution switches from boiling and changing phase to increasing molecule velocity.

Explanation

The correct answer is B.

We cannot know if a phase change or boiling would be reached.

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Thermodynamics

19. Equal amounts of heat are absorbed by 50g solid metal samples, each has a different specific heat value however. Which of the following regarding metals and their specific heat values are true?

A. The metal with the smallest specific heat value will undergo the smallest amount of temperature change.

B. The metal with the smallest specific heat value will resist melting better than that with a greater specific heat value.

C. The metal with the greatest specific heat value will resist melting better than that with a smaller specific heat value.

D. The metal with the greatest specific heat value will undergo the smallest change in temperature.

Explanation

The correct answer is D.

Specific heat capacity value refers to the amount of heat needed to cause a unit of mass to change its temperature by 1C. Therefore, the greater the specific heat capacity the smaller the temperature change a metal will undergo for a given heat.

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Titration

20. HCl + NaOH -> H₂O + NaCl. If 33ml of 3M HCl is required for this titration how many mmol of NaOH are required?

A. ~100mmol

B. ~33mmol

C. ~66mmol

D. ~50mmol

Explanation

The correct answer is A.

Candidates should do 33 x 3 to ascertain that ~100mmol of HCl will be required. This same idea can be used to answer the other questions in this section.

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Titration

21. If the M of the HCl were raised to 5M, how would this affect the amount of NaOH required for the titration?

A. 150mmol

B. 125mmol

C. 165mmol

D. 200mmol

The correct answer is D.

Alkenes contain double bonds which rules out C. Double bonds are more reactive and easier to break open and add new atoms to.

Post Comment

Isabella Medicmind Tutor

Fri, 24 Feb 2023 15:18:22

This is not worded well. Double bonds are stronger than single bonds present in alkanes, and therefore harder to break.

Alkanes and alkenes

34. What is the correct test for an alkene?

A. Turn universal indicator purple

B. Turn bromide water colourless

C. Turn limewater cloudy

D. Turn chloride acetate blue

Explanation

The correct answer is B.

Universal indicator identifies pH. Limewater is the test for carbon dioxide. Option D is made up.

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Aromatic compounds

35. Benzene ring (C₆H₆) is an example of what?

A. Alcohol

B. Acetyl compound

C. Valence structure

D. Aromatic compound

Explanation

The correct answer is D.

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Aromatic compounds

36. Which of the following shows the correct structure for a benzene ring?

Explanation

The correct answer is A.

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Aromatic compounds

37. Which of the following is true about the length and strength of the carbon bonds?

A. They are equal and intermediate between double and single bonds.

B. Double bonds are long and stronger.

C. Single bonds are shorter and stronger.

D. Double bonds are shorter but single bonds are stronger.

Explanation

The correct answer is A.

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Aromatic compounds

38. What is the angle of the bond between the carbon rings?

A. 80°

B. 100°

C. 120°

D. 145°

Explanation

The correct answer is C.

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Aromatic compounds

39. What is the correct name for the following compound?

A. Nitrogen-benzene

B. Nitric-benzene

C. Nitrobenzene

D. Nitrogenised benzene

Explanation

The correct answer is C.

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Aromatic compounds

40. What is the name for the process that forms the compound above?

A. Hydrogenation

B. Nitration

C. Halogenation

D. Nitrogenation

Explanation

The correct answer is B.

H is substituted for NO2.

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Aromatic compounds

41. What is the correct name for the following compound?

A. Benzene chloride

B. Hydrochloride benzene

C. Benzene chlorine

D. Chlorobenzene

Explanation

The correct answer is D.

Post Comment

anonymous Medicmind Tutor

Tue, 08 Feb 2022 19:04:11

why is this wrong and the explanation does not answer this either

Aromatic compounds

42. What is the name of the process which forms the compound above?

A. Halogenation

B. Chlorinification

C. Chlorine acidification

D. Hydrogenation with chloride

Explanation

The correct answer is A.

Addition of a halogen.

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Carboxylic acids

Look at the following list of carboxylic acids and use them to answer the questions below.

• Pentanoic acid

• Hexanoic acid

• Heptanoic acid

• Octoanoic acid

• Nonanoic acid

• Decanoic acid

43. Which of the following will have the highest boiling point?

A. Pentanoic acid

B. Heptanoic acid

C. Nonanoic acid

D. Decanoic acid

Explanation

The correct answer is D.

The longer the chain the higher the boiling point.

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Carboxylic acids

Look at the following list of carboxylic acids and use them to answer the questions below.

• Pentanoic acid

• Hexanoic acid

• Heptanoic acid

• Octoanoic acid

• Nonanoic acid

• Decanoic acid

44. Which of the list will have the lowest boiling point?

A. Pentanoic acid

B. Hexanoic acid

C. Nonanoic acid

D. Decanoic acid

Explanation

The correct answer is A.

The shorter chains will have a lower boiling point.

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Carboxylic acids

Look at the following list of carboxylic acids and use them to answer the questions below.

• Pentanoic acid

• Hexanoic acid

• Heptanoic acid

• Octoanoic acid

• Nonanoic acid

• Decanoic acid

45. Which of the following would dissolve most easily in water?

A. Decanoic acid

B. Hexanoic acid

C. Heptanoic acid

D. Octanoic acid

Explanation

The correct answer is B.

The shorter the chain the easier it is to dissolve the acid.

Post Comment

Carboxylic acids

Look at the following list of carboxylic acids and use them to answer the questions below.

• Pentanoic acid

• Hexanoic acid

• Heptanoic acid

• Octoanoic acid

• Nonanoic acid

• Decanoic acid

46. Which of the following would have the greatest impact on raising the boiling and melting point for a carboxylic acid?

A. Reducing the number of hydrogens and carbons.

B. Increasing the number of oxygens and carbons.

C. Mixing it with water.

D. Combining it with ketone bodies.

Explanation

The correct answer is B.

The longer the chain the higher the melting and boiling point. We cannot know based on the table whether adding ketones or mixing it with water would increase melting and boiling points.

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Carboxylic acids

Look at the following list of carboxylic acids and use them to answer the questions below.

• Pentanoic acid

• Hexanoic acid

• Heptanoic acid

• Octoanoic acid

• Nonanoic acid

• Decanoic acid

47. Which of the carboxylic acids would be the most reactive?

A. Decanoic acid

B. Octanoic acid

C. Hexanoic acid

D. Nonanoic acid

Explanation

The correct answer is A.

The longer the chain the more reactive the carboxylic acid.

Post Comment

Carboxylic acids

Look at the following list of carboxylic acids and use them to answer the questions below.

• Pentanoic acid

• Hexanoic acid

• Heptanoic acid

• Octoanoic acid

• Nonanoic acid

• Decanoic acid

48. Which of the following statements is true?

A. Decanoic acid is less reactive that nonanoic acid.

B. Heptanoic acid is less reactive than octanoic acid.

C. Hexanoic acid is not as reactive as nonanoic acid.

D. Decanoic acid is an example of an unreactive carboxylic acid.

Explanation

The correct answer is B.

The longer the chain the more reactive the carboxylic acid.

Post Comment

Carboxylic acids

Look at the following list of carboxylic acids and use them to answer the questions below.

• Pentanoic acid

• Hexanoic acid

• Heptanoic acid

• Octoanoic acid

• Nonanoic acid

• Decanoic acid

49. The addition of certain compounds and elements to a carboxylic acid can increase it’s reactivity. Which of the following would cause the greatest increase in reactivity?

A. C

B. Br

C. Mg

D. Cl

Explanation

The correct answer is D.

The addition of an electronegative substituent increases acidity and thus reactivity. Of all the elements listed Cl is the most electronegative and the most reactive.

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Carboxylic acids

Look at the following list of carboxylic acids and use them to answer the questions below.

• Pentanoic acid

• Hexanoic acid

• Heptanoic acid

• Octoanoic acid

• Nonanoic acid

• Decanoic acid

50. Which of the following statements are correct?

A. The more neutral the carboxylic acid the more reactive it is.

B. The more basic the carboxylic acid the more reactive it is.

C. The more acidic the carboxylic acid the more reactive it is.

D. Acidity and alkalinity have no bearing on reactivity.

Explanation

The correct answer is C.

The more electronegative and therefore the more acidic a substance the more reactive it is.

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Elimination reaction

An elimination reaction is shown below.

Image reference: https://www.chemguide.co.uk

51. Which of the following statements is correct?

A. One of the lone oxygen pairs of the hydroxide ion moves to bind with a hydrogen atom on one of the CH3 groups resulting in a water molecule.

B. One electron moves from the hydroxide ion to bind with a hydrogen atom on one of the CH3 groups resulting in a water molecule.

C. Two oxygen pairs of the hydroxide ion moves to bind with a hydrogen atom on one of the CH3 groups resulting in a water molecule.

D. One of the lone oxygen pairs of the hydroxide ion moves to bind with a hydrogen atom on one of the CH3 groups resulting in a hydroxide molecule.

Explanation

The correct answer is A.

Candidates should use the help of the equation diagram to be able to determine that of the statements only A is correct.

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Elimination reaction

An elimination reaction is shown below.

Image reference: https://www.chemguide.co.uk

52. What happens to the bromine in this elimination equation?

A. It gains an electron pair from the carbon-bromide bond and as a result produces a bromide ion.

B. It loses an electron pair from the carbon-bromine bond and as a result produces a bromide ion.

C. It gains an electron pair from the carbon-bromine bond and as a result produces a bromide ion.

D. It loses an electron pair from the carbon-bromine bond and as a result produces a bromine ion.

Explanation

The correct answer is C.

Candidates should be able to see that bromine gains electrons thus ruling out B and D. Candidates should read carefully and identify the inaccuracy in statement A saying carbon-bromide bond.

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Elimination reaction

An elimination reaction is shown below.

Image reference: https://www.chemguide.co.uk

53. Which of the following statements are true?

A. Water and the hydrocarbon are negative, bromide is neutral.

B. Water and the hydrocarbon are neutral, bromide is negative.

C. Water, the hydrocarbon and bromide are neutral.

D. Water and the hydrocarbon are positive, bromide is negative.

Explanation

The correct answer is B.

Candidates can see that the water and hydrocarbon are not charged and that bromide is negative.

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Free radicals

54. Which of the following is the correct definition of a free radical?

A. An unstable and highly reactive chemical species with a paired electron in the valence shell of the molecules.

B. An unstable and highly reactive chemical species with an unpaired electron in the valence shell of the molecule.

C. A stable and unreactive chemical species with a paired electron in the valence shell of the molecule.

D. A stable and unreactive chemical species with an unpaired electron in the valence shell of the molecule.

Explanation

The correct answer is B.

Free radicals are unstable and highly reactive species, this reactivity stems from an unpaired electron.

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Free radicals

55. Under what conditions does the human body make free radicals?

A. Normal cellular respiration

B. Exclusively in high levels of skeletal muscle usage

C. Exclusively in anaerobic respiration

D. Exclusively at times of hypoxia.

Explanation

The correct answer is A.

A free radicals are a naturally occurring phenomemon and are the result of normal cellular respiration, therefore all other answers are false.

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Free radicals

56. Which of the following would increase the production of free radicals?

A. High fibre diet

B. Multivitamin use

C. Eating unwashed fruit and vegetables

D. Any and all medication usage

Explanation

The correct answer is C.

Pesticide exposure can increase free radicals and this is what candidates should be able to think of when reading unwashed fruit and veg consumption, options A and B are considered part of a healthy lifestyle and candidates cannot know if all medication usage produces free radicals.

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Free radicals

57. Considering that free radicals are harmful which of the following would be the most harmful to the human body?

A. Oxygen

B. Iron

C. Acetylcholine

D. Cholesterol

Explanation

The correct answer is D.

Candidates should know the hazards cholesterol can pose to health.

Post Comment

Isabella Medicmind Tutor

Fri, 24 Feb 2023 15:27:31

Yes excess cholesterol is bad for your health but does it not act in anti-free radical activity? Does it not neutralize them?

Oxidation and reduction

Ascorbic acid protects the body against free radicals, the following equation takes place in the stomach. Use this information to answer the following questions

C₆H₈O₆ + 2H+ +2NO₂¯ -> C₆H₆O₆ + 2H₂0 + 2NO

58. What is the oxidising agent?

A. NO₂¯

B. C₆H₈O₆

C. NO

D. 2H⁺

Explanation

The correct answer is B.

See answer below.

Oxidation is the loss of electrons. Reduction is the gain of electrons. In light of this the reducing agent is the one that becomes oxidised (ascorbic acid) and the oxidising agent is the one that gets reduced.

Post Comment

Emma Medicmind Tutor

Mon, 11 Mar 2024 21:14:34

Asorbic acid is a reducing agent surely? Asorbic acid has lost H+ and so has been oxidised. And so NO2- is the oxidising agent as it has been reduced?

Oxidation and reduction

Ascorbic acid protects the body against free radicals, the following equation takes place in the stomach. Use this information to answer the following questions

C₆H₈O₆ + 2H+ +2NO₂¯ -> C₆H₆O₆ + 2H₂0 + 2NO

59. What is the reducing agent?

A. NO₂¯

B. C₆H₈O₆

C. NO

D. 2H⁺

Explanation

The correct answer is A.

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Oxidation and reduction

Ascorbic acid protects the body against free radicals, the following equation takes place in the stomach. Use this information to answer the following questions

C₆H₈O₆ + 2H+ +2NO₂¯ -> C₆H₆O₆ + 2H₂0 + 2NO

60. Which of the following is not a way for electrons to be transferred?

A. Directly as electrons

B. Through combining with oxygen

C. As hydride ions

D. As hydrogen ions

Explanation

The correct answer is D.

A hydrogen ion would be H+, devoid of electrons and is thus incorrect.

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Oxidation and reduction

MnO4¯ +C2O4¯² -> Mn2⁺² + CO₂²

61. To balance the following equation which shows the redox reaction to produce manganese (II), what coefficient infront of manganese (II) would be needed?

A. 2

B. 3

C. 1

D. 5

Explanation

The correct answer is A.

Candidates must balance the equation to determine the coefficient.

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Spectroscopy

Spectroscopy is the study of the interaction between matter and light using infrared light.

Image reference: https://www.compoundchem.com/2015/02/05/irspectroscopy/

62. Considering how spectroscopy measures the interaction between light and matter which of the following is correct about how it works?

A. Infrared light is shone through the compound and the light that passes through rather than being absorbed is measured and from this the frequency of absorption can be used to identify the species of atoms within a molecule.

B. Infrared light is shone on a compound and the amount of light absorbed is measured to identify the species of atoms present in the molecule.

C. Infrared light is shone on a compound and the amount of light reflected off of the compound is measured and used to identify the atoms present in the molecules.

D. By knowing how much light is allowed to pass through a compound we can know how much is reflected and therefore what the molecule is.

Explanation

The correct answer is A.

Of all the options only A is correct, the other three options contain faults and flaws that make them inaccurate and incorrect.

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Spectroscopy

Spectroscopy is the study of the interaction between matter and light using infrared light.

Image reference: https://www.compoundchem.com/2015/02/05/irspectroscopy/

63. What is correct regarding absorption?

A. The higher up the graph a compound the worse it’s absorption capacity.

B. The lower the compound on the graph the more reflective it is.

C. The higher up the graph a compound sits the more light it absorbs.

D. The higher up the graph a compound the less light it absorbs.

Explanation

The correct answer is C.

Of all the options, only C makes sense considering how spectroscopy works.

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Spectroscopy

Spectroscopy is the study of the interaction between matter and light using infrared light.

Image reference: https://www.compoundchem.com/2015/02/05/irspectroscopy/

64. Which one has strong wavelength absorption ability?

A. Carbonyls

B. Esters

C. Aldehyde

D. Nitrile

Explanation

The correct answer is C.

Post Comment

Isabella Medicmind Tutor

Wed, 03 Aug 2022 07:39:44

Esters also have a strong wavelength absorption as it is also a carbonyl so all carbonyls should be the answer actually

Isabella Medicmind Tutor

Fri, 24 Feb 2023 15:32:45

Why is carbonyls not the answer? Aldehydes have a medium absorption

Spectroscopy

Spectroscopy is the study of the interaction between matter and light using infrared light.

Image reference: https://www.compoundchem.com/2015/02/05/irspectroscopy/

65. Which of the following absorbs the shortest wavelength?

A. Ester

B. Alkene

C. Carboxylic acid

D. Alkane

Explanation

The correct answer is B.

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Spectroscopy

Spectroscopy is the study of the interaction between matter and light using infrared light.

Image reference: https://www.compoundchem.com/2015/02/05/irspectroscopy/

66. Which of the following absorbs the longest wavelength?

A. Alcohols, phenols

B. Alkanes

C. Alkynes

D. Alkene aromatics

Explanation

The correct answer is A.

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Spectroscopy

Spectroscopy is the study of the interaction between matter and light using infrared light.

Image reference: https://www.compoundchem.com/2015/02/05/irspectroscopy/

67. What wavelength would ethanol not absorb according to the graph?

A. 3200-3500

B. 1650-1750

C. 1000-1300

D. 3200-3400

Explanation

The correct answer is B.

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Spectroscopy

Spectroscopy is the study of the interaction between matter and light using infrared light.

Image reference: https://www.compoundchem.com/2015/02/05/irspectroscopy/

68. What wavelength would butane not absorb according to the graph?

A. 2800-3000

B. 1400-1440

C. 1350-1450

D. 2600-2700

Explanation

The correct answer is D.

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Spectroscopy

Spectroscopy is the study of the interaction between matter and light using infrared light.

Image reference: https://www.compoundchem.com/2015/02/05/irspectroscopy/

69. What wavelength could ethene not absorb according to the graph?

A. 750-1000

B. 3000-3180

C. 3200-3500

D. 600-700

Explanation

The correct answer is C.

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Spectroscopy

Spectroscopy is the study of the interaction between matter and light using infrared light.

Image reference: https://www.compoundchem.com/2015/02/05/irspectroscopy/

70. What has weak absorption?

A. Alkane

B. Alkene

C. Alkyne

D. Carbonyls

Explanation

The correct answer is C.

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Spectroscopy

Spectroscopy is the study of the interaction between matter and light using infrared light.

Image reference: https://www.compoundchem.com/2015/02/05/irspectroscopy/

71. Which has variable absorption?

A. Aliphatic amines

B. Alkanes

C. Alkynes

D. Aldehydes

Explanation

The correct answer is A.

Candidates should use the graph to answer all the above questions.

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Substitution reactions

72. Look at the following answers and select which is most likely to undergo an SN1 reaction.

A. t-butyl bromide with ethanol

B. 2-bromo-4-methypentane with LiBr

C. 1-bromopropane with ethanol

D. 1-bromopropane with LiBr

Explanation

The correct answer is A.

SN1 reactions are those involving weak nucleophiles. A large, branched electrophile with significant leaving groups will lead to an SN1 reaction, an example is a tertiary alkyl halide. Answer A matches this description.

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Substitution reactions

73. Which of the following would undergo an SN2 reaction?

A. 2-bromo-2-methylbutane with LiOH

B. 1-bromobutane with KOH

C. t-butyl brome with H₂O

D. 2-chloro-3-methylhexane with HCl

Explanation

The correct answer is B.

SN2 reactions are preferred by reactants that are strong nucleophiles along with a primary electrophile present. The reactants in option B are in keeping with this requirement.

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Chemistry - Part 2 Review Screen

Instructions

Below is a summary of your answers. You can review your questions in three (3) different ways.

The buttons in the lower right-hand corner correspond to these choices:

1. Review all of your questions and answers.
2. Review questions that are incomplete.
3. Review questions that are flagged for review. (Click the 'flag' icon to change the flag for review status.)

You may also click on a question number to link directly to its location in the exam.

Chemistry - Part 2 Section

Final Answer Review Screen

Instructions

This review section allows you to view the answers you made and see whether they were correct or not. Each question accessed from this screen has an 'Explain Answer' button in the top left hand side. By clicking on this you will obtain an explanation as to the correct answer.

At the bottom of this screen you can choose to 'Review All' answers, 'Review Incorrect' answers or 'Review Flagged' answers. Alternatively you can go to specific questions by opening up any of the sub-tests below.

Chemistry - Part 2 Section

TI-108

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GAMSAT Section III Chemistry – Part 2

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