Chem & Physics II - Quiz 1

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  • 1/80 Questions

    The positively charged particles in the nucleus of the atom are called:

    • Protons
    • Neutrons
    • Electrons
    • Quantums
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About This Quiz


A quiz reviewing the material for the first test of chem and physics II. Included is inorganic review, organic review, and inhalatational agents.

Chem & Physics II - Quiz 1 - Quiz

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  • 2. 

    Avogadro’s number states  that a mole is 6.022 x 1023 molecules of any given substance.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Avogadro's number is a fundamental constant in chemistry that represents the number of particles (atoms, molecules, ions, etc.) in one mole of a substance. It is defined as 6.022 x 10^23, which means that there are 6.022 x 10^23 molecules in one mole of any given substance. Therefore, the statement that "Avogadro’s number states that a mole is 6.022 x 10^23 molecules of any given substance" is true.

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  • 3. 

    Which of the following prefixes indicates a 6 carbon chain?

    • Hept

    • Dec

    • Hex

    • Pent

    Correct Answer
    A. Hex
    Explanation
    The prefix "hex" indicates a 6 carbon chain. In organic chemistry, prefixes are used to indicate the number of carbon atoms in a molecule. The prefix "hex" specifically refers to a 6 carbon chain. Therefore, "hex" is the correct answer in this case.

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  • 4. 

    Comic Relief:

    • Dude!!! That is messed up!!!

    • Love that movie

    • I feel the same way sometimes......

    • All The Above

    Correct Answer
    A. All The Above
    Explanation
    The given answer, "All The Above," is correct because it encompasses all the options mentioned in the previous statements. The statement "Dude!!! That is messed up!!!" suggests that something unusual or unexpected has occurred, which can be a characteristic of comic relief. The statement "Love that movie" indicates a positive reaction to a humorous film, further supporting the idea of comic relief. Lastly, the statement "I feel the same way sometimes..." implies that the individual can relate to the need for comic relief in certain situations. Therefore, "All The Above" is the correct answer.

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  • 5. 

    In a chemical reaction, an enzyme is generally an example of a…

    • Polyatomic Ion

    • Inhibitor

    • Entropic Molecule

    • Catalyst

    Correct Answer
    A. Catalyst
    Explanation
    An enzyme is generally an example of a catalyst. Catalysts are substances that increase the rate of a chemical reaction without being consumed in the process. Enzymes are biological catalysts that speed up specific biochemical reactions in living organisms. They lower the activation energy required for the reaction to occur, allowing it to proceed more quickly. Enzymes are highly specific in their function and can catalyze a wide range of reactions in cells.

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  • 6. 
    Name the following compound.   - ProProfs

    Name the following compound.  

    • 3,5- diethyl 2-methyl octane

    • 4,6-diethyl 7-methyl octane

    • Trentane

    • 2-ethyl 3-ethyl 5-methyl octane

    Correct Answer
    A. 3,5- diethyl 2-methyl octane
    Explanation
    The correct answer is 3,5-diethyl 2-methyl octane. This is because the compound is named based on the longest carbon chain, which in this case is an octane. The substituents are then numbered based on their position on the chain, with the diethyl groups at positions 3 and 5, and the methyl group at position 2.

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  • 7. 

    What functional group is shown here?  CH3—CH2—OH

    • Alcohol

    • Amine

    • Ether

    • Aldehyde

    Correct Answer
    A. Alcohol
    Explanation
    The functional group shown in the given structure is an alcohol. This is indicated by the -OH group attached to the carbon chain. Alcohols are organic compounds that contain a hydroxyl group (-OH) bonded to a carbon atom. In this case, the -OH group is attached to the second carbon atom in the chain, making it an alcohol.

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  • 8. 

    Which of the following prefixes indicates a 4 carbon chain?

    • But

    • Prop

    • Non

    • Hex

    Correct Answer
    A. But
    Explanation
    The prefix "But" indicates a 4 carbon chain. The prefix "But" is derived from the word "butane," which is a hydrocarbon with a 4 carbon chain.

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  • 9. 

    Which of the following prefixes indicates a 9 carbon chain?

    • Prop

    • Hex

    • Dec

    • Non

    Correct Answer
    A. Non
    Explanation
    The prefix "non" indicates a 9 carbon chain. This is because the prefix "non" is derived from the Latin word "nonus" which means "nine". Therefore, when used as a prefix in chemistry, "non" indicates a compound or molecule with a chain of 9 carbon atoms.

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  • 10. 

    Today you car caring for Mr. Fahrenheit whose temperature is currently 98.6 degrees Fahrenheit. What is his temperature in Celsius?

    • 36

    • 37

    • 35

    • 38

    Correct Answer
    A. 37
    Explanation
    To convert a temperature from Fahrenheit to Celsius, you subtract 32 from the Fahrenheit temperature and then multiply the result by 5/9. In this case, subtracting 32 from 98.6 gives 66.6, and multiplying that by 5/9 gives approximately 37. Therefore, Mr. Fahrenheit's temperature in Celsius is 37.

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  • 11. 

    Cl− is an example of :

    • Cation

    • Isomer

    • Anion

    • None of above

    Correct Answer
    A. Anion
    Explanation
    Cl- is an example of an anion because it is a negatively charged ion. Anions are formed when an atom gains electrons, resulting in a negative charge. In the case of Cl-, chlorine gains one electron to achieve a stable electron configuration, making it an anion. Cations, on the other hand, are positively charged ions formed when an atom loses electrons. Isomers are different forms of the same compound, and none of the above refers to options other than cation, isomer, or anion, which do not apply in this case.

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  • 12. 

    According to it’s charge, how many electrons has K+  gained or lost?

    • None, this element is stable

    • It has lost one electron

    • It has gained one electron

    Correct Answer
    A. It has lost one electron
    Explanation
    The correct answer is "It has lost one electron." The question is asking about the charge of K+. The "+" sign indicates that the element has lost one electron, resulting in a positive charge.

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  • 13. 

    How would you name this compound?                    CH2                                                                                 /      \                                                                            CH2 --- CH2

    • Isopropyl

    • Cyclopropane

    • Cyclobutane

    • SecButyl

    Correct Answer
    A. Cyclopropane
    Explanation
    The compound shown in the question has three carbon atoms arranged in a cyclic structure. This type of compound is called cyclopropane. Cyclopropane consists of a three-membered ring, where each carbon atom is bonded to two hydrogen atoms. Therefore, the correct name for this compound is Cyclopropane.

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  • 14. 
    Name the following compound.   - ProProfs

    Name the following compound.  

    • Hexane

    • Heptane

    • Butane

    • Pentane

    Correct Answer
    A. Pentane
    Explanation
    The compound being named in this question is pentane. This is because pentane is the only compound listed among the options. Hexane, heptane, and butane are not the correct answers as they do not match the name provided in the question.

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  • 15. 
    Name this compound: - ProProfs

    Name this compound:

    • 2-bromo-2-chloro-1,1,1-trifluoro-ethyl ether

    • 2-bromo-2-chloro-1,1,1-trifluoro-ethane

    • Penthalide ether

    • Ethyl Halide

    Correct Answer
    A. 2-bromo-2-chloro-1,1,1-trifluoro-ethane
    Explanation
    The compound is named 2-bromo-2-chloro-1,1,1-trifluoro-ethane because it contains a chain of four carbon atoms with a bromine atom and a chlorine atom attached to the second carbon, and three fluorine atoms attached to the third carbon. The suffix "-ane" indicates that it is an alkane, and the prefixes "bromo," "chloro," and "trifluoro" indicate the presence of bromine, chlorine, and trifluoromethyl groups, respectively. The prefix "2-" indicates the position of the substituents on the carbon chain.

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  • 16. 

    You are SRNA for Mr. Celsius today. When reading his temperature the monitor reads 35 degrees Celsius. What is his temperature in Fahrenheit?

    • 95

    • 94

    • 97

    • 99

    Correct Answer
    A. 95
    Explanation
    To convert Celsius to Fahrenheit, you can use the formula: (°C × 9/5) + 32. In this case, we have 35 degrees Celsius. Plugging this value into the formula, we get (35 × 9/5) + 32 = 95 degrees Fahrenheit. Therefore, the correct answer is 95.

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  • 17. 

    Metals are more likely to form which type of Ion?

    • Anion

    • Cation

    • Polyatomic

    • Isotopic

    Correct Answer
    A. Cation
    Explanation
    Metals are more likely to form cations because they tend to lose electrons in chemical reactions. Cations are positively charged ions, formed when an atom loses one or more electrons. Since metals have relatively low ionization energies, they can easily lose electrons from their outermost energy level, resulting in a more stable electron configuration. This loss of electrons creates a positively charged cation.

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  • 18. 

    What is the difference between an Alkyne and an Alkane?

    • The alkane possesses a triple bond

    • The alkane possesses a functional group attached to it.

    • The alkyne possesses a triple bond.

    • The alkyne possesses a double bond.

    Correct Answer
    A. The alkyne possesses a triple bond.
    Explanation
    The correct answer is that the alkyne possesses a triple bond. Alkynes are hydrocarbons that contain a carbon-carbon triple bond, whereas alkanes are hydrocarbons that only contain single bonds between carbon atoms. This triple bond in alkynes gives them different chemical properties and reactivity compared to alkanes.

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  • 19. 

    What functional Group is shown here?                                  O                                                                                                 II                                                                                              CH3 – C – O – H

    • Carboxylic Acid

    • Acid Halide

    • Ester

    • Thiol

    Correct Answer
    A. Carboxylic Acid
    Explanation
    The functional group shown in the given structure is a carboxylic acid. This can be identified by the presence of the carboxyl group, which consists of a carbonyl group (C=O) and a hydroxyl group (OH) attached to the same carbon atom. In the given structure, the carboxyl group is represented by the -COOH group. Carboxylic acids are organic compounds that are characterized by their acidic properties and are commonly found in many biological and chemical processes.

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  • 20. 

    An atom with identical Atomic numbers but different mass numbers is known as:

    • Isomers

    • Isotopes

    • Stereoisomers

    • Chiral

    Correct Answer
    A. Isotopes
    Explanation
    Isotopes are atoms of the same element that have the same number of protons (atomic number) but different numbers of neutrons (mass number). This means that isotopes have different atomic masses. Isotopes can have similar chemical properties due to their identical number of protons, but their physical properties may vary due to differences in mass. Therefore, an atom with identical atomic numbers but different mass numbers is known as isotopes.

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  • 21. 

    Which of the following is not a property of metals?

    • Many exist as diatomic molecules

    • Tend to lose electrons in reactions with non-metals

    • Good conductors of heat and electricity

    • Malleable and Ductile

    Correct Answer
    A. Many exist as diatomic molecules
  • 22. 
    Name this compound: - ProProfs

    Name this compound:

    • 1-ethyl 2-methyl pentane

    • 2,3-dimethyl hexane

    • Octane

    • 4-methyl 5-methyl hexane

    Correct Answer
    A. 2,3-dimethyl hexane
    Explanation
    The correct answer is 2,3-dimethyl hexane. This compound is named based on the longest carbon chain, which is hexane. The methyl groups are located on the second and third carbons of the chain, hence the name 2,3-dimethyl.

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  • 23. 

    Which of the following is a halogenated alkane?

    • Sevoflurane

    • Desflurane

    • Halothane

    • Isoflourane

    Correct Answer
    A. Halothane
    Explanation
    Halothane is a halogenated alkane because it contains a halogen atom (in this case, fluorine) bonded to a carbon atom. It is commonly used as an inhalation anesthetic in medical procedures. Sevoflurane, desflurane, and isoflurane are also inhalation anesthetics, but they are not halogenated alkanes as they do not contain a halogen atom.

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  • 24. 

    Which of the following elements is likely to form an Anion easily?

    • Flourine

    • Helium

    • Potassium

    • Sodium

    Correct Answer
    A. Flourine
    Explanation
    Fluorine is likely to form an anion easily because it is a highly electronegative element. It has seven valence electrons and only needs one more electron to achieve a stable electron configuration, which it can easily gain by accepting an electron from another atom. This results in the formation of a negatively charged ion, or an anion. Helium, potassium, and sodium are unlikely to form anions easily as they have low electronegativity and tend to lose electrons to form cations instead.

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  • 25. 

    What functional Group is shown here?   CH3—Br

    • Thiol

    • Aldehyde

    • Ketone

    • Halide

    Correct Answer
    A. Halide
    Explanation
    The functional group shown in the given compound CH3—Br is a halide. This is indicated by the presence of the halogen atom (Br) bonded to a carbon atom (CH3). Halides are organic compounds that contain a halogen atom, such as fluorine, chlorine, bromine, or iodine, bonded to a carbon atom. In this case, the halogen atom is bromine, so the compound is a bromide or halide.

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  • 26. 

    How would you name this compound?  CH3 – CH2 – O – CH2 – CH3

    • Diethyl Ether

    • Butane Ether

    • Diethyl Ketone

    • Cyclopentane

    Correct Answer
    A. Diethyl Ether
    Explanation
    The correct answer is Diethyl Ether. This compound is named as diethyl ether because it consists of two ethyl groups (CH3-CH2-) attached to an oxygen atom (O). Ether is a class of organic compounds that have an oxygen atom bonded to two alkyl or aryl groups. In this case, the two ethyl groups are attached to the oxygen atom, hence the name diethyl ether.

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  • 27. 
    Name this compound: - ProProfs

    Name this compound:

    • Halothane

    • Desflurane

    • Sevoflurane

    • Isoflurane

    Correct Answer
    A. Halothane
    Explanation
    Halothane is the correct answer because it is one of the compounds listed and the question asks for the name of the compound.

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  • 28. 

    How would you name this compound?  H3C–CH2–CH2–CH2–CH2–CH2–CH3

    • Hexane

    • Nonane

    • Heptane

    • Butane

    Correct Answer
    A. Heptane
    Explanation
    The given compound has a total of 7 carbon atoms, which corresponds to the prefix "hept-" in the IUPAC naming system. The compound also has only single bonds between the carbon atoms, indicating that it is an alkane. Therefore, the correct name for this compound is heptane.

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  • 29. 

    Which of the following is not a property of non-metals?

    • Many exist as diatomic molecules

    • Gain electrons when reacting with metals

    • Malleable and Ductile

    • Poor conductors of heat and electricity

    Correct Answer
    A. Malleable and Ductile
    Explanation
    The property of being malleable and ductile refers to the ability of a material to be hammered into thin sheets or drawn into wires, which is a characteristic of metals. Non-metals, on the other hand, are generally brittle and cannot be easily shaped or stretched. Therefore, the property of being malleable and ductile does not apply to non-metals.

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  • 30. 

    Specific heat is defined as:

    • The energy required to transform a given quantity of a substance into a gas

    • The amount of thermal energy which must be absorbed or evolved for 1 mole of a substance to change states from a solid to a liquid or vice versa

    • The amount of energy in the form of heat released or absorbed by a chemical substance during a change of state

    • The amount of energy needed to increase a substance’s temperature by 1 degree C.

    Correct Answer
    A. The amount of energy needed to increase a substance’s temperature by 1 degree C.
    Explanation
    The correct answer is the amount of energy needed to increase a substance's temperature by 1 degree C. This definition of specific heat refers to the amount of energy required to raise the temperature of a substance by a certain amount. It is a measure of how much heat energy is needed to cause a temperature change in a given amount of substance.

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  • 31. 

    Name this compound.   CH3-CH2-OH

    • Ethyl Aldehyde

    • Ethyl Ketone

    • Ethyl Ether

    • Ethyl Alcohol

    Correct Answer
    A. Ethyl Alcohol
    Explanation
    The compound CH3-CH2-OH is named ethyl alcohol. This is because it consists of an ethyl group (CH3-CH2-) attached to a hydroxyl group (-OH). Ethyl alcohol is also commonly known as ethanol and is a type of alcohol that is commonly used as a solvent, fuel, and in the production of alcoholic beverages.

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  • 32. 
    Name This Compound: - ProProfs

    Name This Compound:

    • Halothane

    • Sevoflurane

    • Isoflurane

    • Desflurane

    Correct Answer
    A. Isoflurane
    Explanation
    Isoflurane is the correct answer because it is one of the compounds listed that is commonly used as an inhalation anesthetic. Halothane, Sevoflurane, and Desflurane are also commonly used anesthetics, but the question specifically asks for the compound named "Isoflurane".

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  • 33. 

    You are donating blood today! Hurray to you for being a super citizen. As the blood comes out of your arm and flows into the bag it contains your RBC’s, WBC’s, and Plasma. This would be an example of what type of mixture?

    • Compound

    • Homogenous

    • Heterogenous

    • Elemental

    Correct Answer
    A. Heterogenous
    Explanation
    The blood in the bag contains different components - red blood cells, white blood cells, and plasma. These components are not evenly distributed throughout the mixture, making it heterogeneous.

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  • 34. 

    The molecular mass of NaCl is approximately 58 grams. How many molecules of NaCl would be contained in 29 grams?

    • 3.01 x 10(23)

    • 28

    • 6.02 x 10(23)

    • 58

    Correct Answer
    A. 3.01 x 10(23)
    Explanation
    The molecular mass of NaCl is approximately 58 grams. This means that one mole of NaCl weighs 58 grams. The Avogadro's number states that there are 6.02 x 10^23 molecules in one mole of any substance. To find the number of molecules in 29 grams of NaCl, we can set up a proportion: 58 grams is to 6.02 x 10^23 molecules as 29 grams is to x molecules. Solving this proportion, we find that x is approximately 3.01 x 10^23 molecules. Therefore, there are approximately 3.01 x 10^23 molecules of NaCl in 29 grams.

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  • 35. 

    Which type of chemical bond is present in Cl2?

    • Ionic

    • Polyatomic

    • Covalent

    • Both A & B

    Correct Answer
    A. Covalent
    Explanation
    The type of chemical bond present in Cl2 is covalent. This is because Cl2 consists of two chlorine atoms that share electrons to form a stable molecule. In a covalent bond, atoms share electrons in order to achieve a full outer electron shell and increase stability. Ionic bonds involve the transfer of electrons from one atom to another, while polyatomic bonds involve the sharing of electrons between multiple atoms. Therefore, the correct answer is covalent.

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  • 36. 
    Name this compound: - ProProfs

    Name this compound:

    • Halothane

    • Isoflurane

    • Desflurane

    • Sevoflurane

    Correct Answer
    A. Desflurane
    Explanation
    The correct answer is Desflurane. Desflurane is a volatile inhalation anesthetic that is commonly used in surgery. It is a halogenated ether compound that is administered via inhalation to induce and maintain general anesthesia. Desflurane has a low blood-gas solubility, which allows for rapid onset and offset of anesthesia. It is also known for its low metabolism, making it a preferred choice in certain patient populations.

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  • 37. 

    Dry ice is an example of what sort of reaction?

    • Exothermic

    • Sublimation

    • Melting

    • Vaporization

    Correct Answer
    A. Sublimation
    Explanation
    Dry ice is an example of sublimation because it undergoes a phase change directly from a solid to a gas without passing through the liquid phase. Sublimation occurs when a substance absorbs enough energy to break the intermolecular forces holding its particles together, causing them to transition from a solid to a gas. In the case of dry ice, which is solid carbon dioxide, it sublimes at a temperature of -78.5 degrees Celsius (-109.3 degrees Fahrenheit).

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  • 38. 

    Name This Compound:  F                                   I                            F -- C -- F     H                                   I            I                            H -- C -- O -- C -- F                                   I            I                            F -- C -- F     H                                  I                                  F

    • Halothane

    • Desflurane

    • Sevoflurane

    • Isoflurane

    Correct Answer
    A. Sevoflurane
    Explanation
    Sevoflurane is the correct answer because it matches the molecular structure given in the question. The structure consists of fluorine (F) atoms attached to a central carbon (C) atom, with hydrogen (H) atoms also attached. Additionally, there are iodine (I) atoms attached to the carbon atoms in the structure. Sevoflurane is a commonly used inhalation anesthetic.

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  • 39. 

    What functional group is shown here? CH3 – CH2—NH2

    • Sulfide

    • Halide

    • Amine

    • Nitro Compound

    Correct Answer
    A. Amine
    Explanation
    The functional group shown in the given compound CH3 – CH2—NH2 is an amine. Amines are organic compounds that contain a nitrogen atom bonded to one or more alkyl or aryl groups. In this case, the compound has an alkyl group (CH3 – CH2) bonded to an amino group (NH2), which consists of a nitrogen atom bonded to two hydrogen atoms. Therefore, the correct answer is Amine.

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  • 40. 

    Name This Compound:  F                                   I                            F -- C -- F     H                                   I            I                            H -- C -- O -- C -- F                                   I            I                            F -- C -- F     H                                  I                                  F

    • 2,2,2-trifluoro-1-(trifluoromethyl) ethyl fluoromethyl ether

    • 1,1,1,3,3,3, hexafluoropropyl methyl halide ether

    • 1,1,1,3,3,3,4 heptafluoro butyl ether

    • 1,1,1-trifluoro-2-(trifluoromethyl) ethyl fluoromethyl ether

    Correct Answer
    A. 2,2,2-trifluoro-1-(trifluoromethyl) ethyl fluoromethyl ether
    Explanation
    The correct answer is 2,2,2-trifluoro-1-(trifluoromethyl) ethyl fluoromethyl ether. This compound is named based on the substituents attached to the main carbon chain. The prefix "2,2,2-trifluoro" indicates that there are three fluorine atoms attached to the second carbon atom. The prefix "1-(trifluoromethyl)" indicates that there is a trifluoromethyl group attached to the first carbon atom. The word "ethyl" indicates that there is an ethyl group attached to the main carbon chain. Finally, the suffix "fluoromethyl ether" indicates that there is a fluoromethyl ether group present.

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  • 41. 

    What functional Group is shown here?  CH3CH2OCH2CH3

    • Ester

    • Ether

    • Ketone

    • Carboxylic Acid

    Correct Answer
    A. Ether
    Explanation
    The functional group shown in the given chemical structure is an ether. An ether is characterized by an oxygen atom bonded to two alkyl or aryl groups. In this case, the oxygen atom is bonded to two ethyl (CH3CH2) groups, indicating the presence of an ether functional group.

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  • 42. 

    What functional group is shown here?  CH3 – CH2 – NO2

    • Amine

    • Aldehyde

    • Carboxylic Acid

    • Nitro Compound

    Correct Answer
    A. Nitro Compound
    Explanation
    The functional group shown in the given chemical structure is a nitro compound. This is indicated by the presence of the NO2 group, which consists of a nitrogen atom bonded to two oxygen atoms. Nitro compounds are characterized by this functional group and are commonly found in organic chemistry.

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  • 43. 

    How would you name this compound? H3C–CH2–CH(CH2CH3)–CH2–CH3

    • 3 methyl hexane

    • Heptane

    • 3 ethyl heptane

    • 3 ethyl pentane

    Correct Answer
    A. 3 ethyl pentane
    Explanation
    The compound is named as 3 ethyl pentane because it contains a pentane backbone with an ethyl group attached to the third carbon atom. The other options, 3 methyl hexane and heptane, do not accurately describe the structure of the compound.

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  • 44. 

    How would you name this compound? CH3 – CH = CH – CH2 – CH3

    • Pentyne

    • 2 Pentene

    • Pentene

    • 3 Pentyne

    Correct Answer
    A. 2 Pentene
    Explanation
    The compound CH3 - CH = CH - CH2 - CH3 is named as 2-pentene. This is because it is a five-carbon chain with a double bond between the second and third carbon atoms. The prefix "pent" indicates that there are five carbon atoms, and the suffix "-ene" indicates the presence of a double bond. The number "2" indicates the position of the double bond in the chain.

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  • 45. 
    Which of the following displays the proper orbital filling of Sulfur? - ProProfs

    Which of the following displays the proper orbital filling of Sulfur?

    • 1s2 2s2 2p6 3s2 3p6 4s1

    • 1s2 2s2 2p6 3s2 3p4

    • [Ar] 3p4

    • 1s2 2s2 2d6 3s2 3d4

    Correct Answer
    A. 1s2 2s2 2p6 3s2 3p4
    Explanation
    The correct answer is 1s2 2s2 2p6 3s2 3p4. This represents the proper orbital filling of Sulfur because it follows the Aufbau principle, which states that electrons fill the lowest energy orbitals first before moving to higher energy orbitals. In this case, the electrons fill the 1s, 2s, 2p, and 3s orbitals completely with 2 electrons each. The remaining 4 electrons are then placed in the 3p orbital, resulting in a total of 6 electrons in the outermost energy level.

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  • 46. 

    Which of the following will have the greatest length between atoms?

    • Single bond

    • Double bond

    • Triple bond

    • All are Equal

    Correct Answer
    A. Single bond
    Explanation
    A single bond will have the greatest length between atoms because it consists of only one shared pair of electrons. In a double bond, there are two shared pairs of electrons, which creates more electron density and pulls the atoms closer together. Similarly, a triple bond has three shared pairs of electrons, resulting in even greater electron density and a shorter bond length. Therefore, the single bond will have the greatest distance between the atoms.

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  • 47. 

    What functional group is shown here? CH3 – S – CH3

    • Sulfide

    • Thiol

    • Halide

    • Aldehyde

    Correct Answer
    A. Sulfide
    Explanation
    The functional group shown in the given structure is a sulfide. A sulfide is a compound that contains a sulfur atom bonded to two carbon atoms. In this case, the sulfur atom is bonded to two methyl (CH3) groups.

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  • 48. 

    How many significant figures are in this number? 2077.50

    • 6

    • 4

    • 5

    • 3

    Correct Answer
    A. 6
    Explanation
    The number 2077.50 has six significant figures. Significant figures are the digits in a number that carry meaning and contribute to its precision. In this case, all the digits (2, 0, 7, 7, 5, and 0) are significant and contribute to the overall precision of the number.

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  • 49. 

    The ____ the molecule the _____ the boiling point.

    • Larger, lower

    • Smaller, higher

    • Larger, higher

    • It has no effect

    Correct Answer
    A. Larger, higher
    Explanation
    The size of the molecule directly affects its boiling point. Larger molecules have more atoms and stronger intermolecular forces, which require more energy to break and therefore have a higher boiling point.

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