Chem & Physics II - Quiz 1
A quiz reviewing the material for the first test of chem and physics II. Included is inorganic review, organic review, and inhalatational agents.
Questions and Answers
- 1.
You are SRNA for Mr. Celsius today. When reading his temperature the monitor reads 35 degrees Celsius. What is his temperature in Fahrenheit?
- A.
95
- B.
94
- C.
97
- D.
99
Correct Answer
A. 95Explanation
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.Rate this question:
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- 2.
Today you car caring for Mr. Fahrenheit whose temperature is currently 98.6 degrees Fahrenheit. What is his temperature in Celsius?
- A.
36
- B.
37
- C.
35
- D.
38
Correct Answer
B. 37Explanation
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.Rate this question:
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- 3.
How many significant figures are in this number? 0.0584
- A.
5
- B.
4
- C.
3
- D.
None
Correct Answer
C. 3Explanation
The number 0.0584 has three significant figures. Significant figures are the digits in a number that carry meaningful information. In this case, the digits 5, 8, and 4 are significant because they are non-zero digits and they are not trailing zeros. The leading zero before the decimal point is not significant. Therefore, the number has three significant figures.Rate this question:
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- 4.
How many significant figures are in this number? 10,000
- A.
1
- B.
2
- C.
5
- D.
4
Correct Answer
C. 5Explanation
The number 10,000 has five significant figures because all the non-zero digits are significant, and there are no trailing zeros.Rate this question:
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- 5.
How many significant figures are in this number? 2077.50
- A.
6
- B.
4
- C.
5
- D.
3
Correct Answer
A. 6Explanation
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.Rate this question:
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- 6.
Hemoglobin is an example of a…
- A.
Element
- B.
Compound
- C.
Homogenous mixture
- D.
Heterogenous mixture
Correct Answer
B. CompoundExplanation
Hemoglobin is a compound because it is composed of different elements, namely carbon, hydrogen, oxygen, nitrogen, and iron. It is a complex protein found in red blood cells that is responsible for carrying oxygen throughout the body. Compounds are formed when two or more elements chemically combine in fixed ratios, and hemoglobin fits this definition as it is made up of specific elements in a specific arrangement.Rate this question:
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- 7.
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?
- A.
Compound
- B.
Homogenous
- C.
Heterogenous
- D.
Elemental
Correct Answer
C. HeterogenousExplanation
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.Rate this question:
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- 8.
Which of the following is not an observed property of matter?
- A.
Density
- B.
Shape
- C.
Compressibility
- D.
Volume
- E.
Thermal Expansion
Correct Answer
D. VolumeExplanation
Volume is an observed property of matter. It refers to the amount of space that a substance occupies. It can be measured and is a characteristic property of different substances. Density is also an observed property of matter, which is the mass of a substance per unit volume. Shape, compressibility, and thermal expansion are all observed properties of matter as well.Rate this question:
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- 9.
The Tec 6 Vaporizer, used for Desflurane, provides us an example of what type of reaction?
- A.
Endothermic
- B.
Sublimation
- C.
Exothermic
- D.
Condensation
Correct Answer
A. EndothermicExplanation
The Tec 6 Vaporizer is used for Desflurane, which is a volatile liquid anesthetic. When Desflurane is administered through the vaporizer, it undergoes a phase change from liquid to gas, which requires an input of heat energy. This process is known as vaporization or evaporation, and it is an example of an endothermic reaction.Rate this question:
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- 10.
Dry ice is an example of what sort of reaction?
- A.
Exothermic
- B.
Sublimation
- C.
Melting
- D.
Vaporization
Correct Answer
B. SublimationExplanation
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).Rate this question:
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- 11.
After intubating your patient for see condensation within the patient ETT. This is an example of what sort of reaction?
- A.
Endothermic
- B.
Crystallization
- C.
Exothermic
- D.
Evaporation
Correct Answer
C. ExothermicExplanation
When intubating a patient, if condensation is observed within the patient's endotracheal tube (ETT), it indicates an exothermic reaction. Exothermic reactions release heat energy to the surroundings. In this case, the warm, moist air exhaled by the patient is cooling down and condensing within the ETT, causing the formation of water droplets. This reaction is exothermic because heat is being transferred from the warm air to the surrounding environment.Rate this question:
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- 12.
Specific heat is defined as:
- A.
The energy required to transform a given quantity of a substance into a gas
- B.
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
- C.
The amount of energy in the form of heat released or absorbed by a chemical substance during a change of state
- D.
The amount of energy needed to increase a substance’s temperature by 1 degree C.
Correct Answer
D. 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.Rate this question:
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- 13.
The positively charged particles in the nucleus of the atom are called:
- A.
Protons
- B.
Neutrons
- C.
Electrons
- D.
Quantums
Correct Answer
A. ProtonsExplanation
Protons are positively charged particles found in the nucleus of an atom. They have a mass of approximately 1 atomic mass unit and are responsible for determining the atomic number of an element. Protons play a crucial role in defining the chemical properties of an atom and are involved in chemical reactions. Neutrons, on the other hand, are neutral particles found in the nucleus, while electrons are negatively charged particles orbiting the nucleus. Quantums is not a term used to describe particles in the nucleus of an atom.Rate this question:
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- 14.
An atom with identical Atomic numbers but different mass numbers is known as:
- A.
Isomers
- B.
Isotopes
- C.
Stereoisomers
- D.
Chiral
Correct Answer
B. IsotopesExplanation
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.Rate this question:
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- 15.
Cl− is an example of :
- A.
Cation
- B.
Isomer
- C.
Anion
- D.
None of above
Correct Answer
C. AnionExplanation
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.Rate this question:
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- 16.
According to it’s charge, how many electrons has K+ gained or lost?
- A.
None, this element is stable
- B.
It has lost one electron
- C.
It has gained one electron
Correct Answer
B. It has lost one electronExplanation
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.Rate this question:
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- 17.
Which of the following elements is likely to form an Anion easily?
- A.
Flourine
- B.
Helium
- C.
Potassium
- D.
Sodium
Correct Answer
A. FlourineExplanation
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.Rate this question:
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- 18.
Metals are more likely to form which type of Ion?
- A.
Anion
- B.
Cation
- C.
Polyatomic
- D.
Isotopic
Correct Answer
B. CationExplanation
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.Rate this question:
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- 19.
OH- is an example of a:
- A.
Cation
- B.
Isotope
- C.
Polyatomic Ion
- D.
Covalent Bond
Correct Answer
C. Polyatomic IonExplanation
OH- is an example of a polyatomic ion because it is a charged molecule composed of two or more atoms that are covalently bonded together. In this case, the hydroxide ion (OH-) consists of one oxygen atom and one hydrogen atom, with a negative charge. Polyatomic ions are commonly found in chemical compounds and play important roles in various chemical reactions and processes.Rate this question:
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- 20.
How many molecules of Neon are in one mole?
- A.
10
- B.
20.18
- C.
3.01 x 10(23)
- D.
6.022 x 10(23)
Correct Answer
D. 6.022 x 10(23)Explanation
One mole of any substance contains Avogadro's number of particles, which is approximately 6.022 x 10^23. Therefore, there are 6.022 x 10^23 molecules of Neon in one mole.Rate this question:
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- 21.
The molecular mass of NaCl is approximately 58 grams. How many molecules of NaCl would be contained in 29 grams?
- A.
3.01 x 10(23)
- B.
28
- C.
6.02 x 10(23)
- D.
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.Rate this question:
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- 22.
Which of the following is a Molecular Formula?
- A.
CH3COCH3
- B.
C3H6O
- C.
H3C-C(O)-CH3
- D.
None of the above
Correct Answer
B. C3H6OExplanation
The correct answer is C3H6O. This is a molecular formula because it represents the actual number and types of atoms present in a molecule. The formula C3H6O indicates that the molecule contains 3 carbon atoms, 6 hydrogen atoms, and 1 oxygen atom. Molecular formulas provide important information about the composition of a compound and can be used to determine its structure and properties.Rate this question:
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- 23.
Which of the following elements are in the same period of the periodic table?
- A.
F & Br
- B.
H & Ne
- C.
Na & Cl
- D.
None of the above
Correct Answer
C. Na & ClExplanation
Na (sodium) and Cl (chlorine) are in the same period of the periodic table because they both have the same number of electron shells. In the periodic table, elements in the same period have the same number of electron shells, which determines their chemical properties and reactivity. Sodium and chlorine are both in the third period of the periodic table, meaning they have three electron shells. Therefore, they are in the same period.Rate this question:
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- 24.
Which of the following elements is a Halogen?
- A.
Helium
- B.
Potassium
- C.
Magnesium
- D.
Iodine
Correct Answer
D. IodineExplanation
Iodine is a halogen because it belongs to Group 17 of the periodic table, also known as the halogens. Halogens are highly reactive nonmetals that have seven valence electrons and readily form compounds with other elements. Iodine specifically is a dark purple solid at room temperature and is commonly used in disinfectants and as a nutrient in some diets.Rate this question:
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- 25.
Which of the following is not a property of metals?
- A.
Many exist as diatomic molecules
- B.
Tend to lose electrons in reactions with non-metals
- C.
Good conductors of heat and electricity
- D.
Malleable and Ductile
Correct Answer
A. Many exist as diatomic molecules -
- 26.
How valence electrons does Aluminum have? 1s2 2s2 2p6 3s2 3p1
- A.
3
- B.
1
- C.
2
- D.
6
Correct Answer
A. 3Explanation
The electron configuration provided for aluminum shows that it has 3 valence electrons. Valence electrons are the electrons in the outermost energy level of an atom, and in this case, the outermost energy level is the 3rd energy level. The 3s2 and 3p1 electrons in the configuration are the valence electrons for aluminum, giving it a total of 3 valence electrons.Rate this question:
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- 27.
How would you properly express the electron filling of Bromine?
- A.
[He][Ne][Ar] 3d10 4s2 4p5
- B.
[Ar] 4s2 4p5
- C.
[Ar] 3d10 4s2 4p5
- D.
[Ar] 4s2 3d10 4p5
Correct Answer
D. [Ar] 4s2 3d10 4p5Explanation
The correct answer is [Ar] 4s2 3d10 4p5. This answer represents the electron filling of Bromine by indicating the electron configuration of the atom. The [Ar] represents the noble gas configuration of Argon, which includes the filled 3p and 3s orbitals. The 4s2 indicates that the 4s orbital is filled with 2 electrons, and the 3d10 indicates that the 3d orbital is filled with 10 electrons. Finally, the 4p5 indicates that the 4p orbital is filled with 5 electrons.Rate this question:
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- 28.
Which Orbital would be the next to get filled after orbital 3s?
- A.
2d
- B.
2p
- C.
3p
- D.
4s
Correct Answer
C. 3pExplanation
After filling the 3s orbital, the next orbital to be filled would be the 3p orbital. Electrons fill orbitals in order of increasing energy, and the 3p orbital has a slightly higher energy than the 3s orbital. Therefore, it would be the next orbital to receive electrons.Rate this question:
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- 29.
Which orbital is the next to get filled after orbital 5s?
- A.
4d
- B.
5p
- C.
3f
- D.
6s
Correct Answer
A. 4dExplanation
After the 5s orbital, the next orbital to get filled is the 4d orbital. This is because in the filling order of orbitals, the energy levels increase as the principal quantum number (n) increases. The 4d orbital has a higher energy level than the 5p and 3f orbitals, but a lower energy level than the 6s orbital. Therefore, the 4d orbital is the next to get filled.Rate this question:
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- 30.
How would you properly write the electron distribution for Argon?
- A.
[Ar]
- B.
[Ne] 3s2 3p6
- C.
[Ne] 3s2 2d10 3p6
- D.
[He][Ne] 3s2 3p6
Correct Answer
B. [Ne] 3s2 3p6Explanation
The electron distribution for Argon is represented by the configuration [Ne] 3s2 3p6. This means that Argon has a total of 18 electrons. The [Ne] represents the electron configuration of the noble gas Neon, which has 10 electrons. The 3s2 and 3p6 represent the remaining 8 electrons in the 3rd energy level.Rate this question:
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- 31.
Why are Halogens among the most reactive of the elements?
- A.
Due to the number of neutrons in the nucleus which makes these atoms highly unstable
- B.
They need to lose one electron before having a full valence shell
- C.
They need to gain only one electron to before having a full valence shell
- D.
Because their lighter atomic weight and high kinetic energy.
Correct Answer
C. They need to gain only one electron to before having a full valence shellExplanation
Halogens are among the most reactive elements because they need to gain only one electron to have a full valence shell. This makes them highly reactive as they readily form compounds by gaining electrons from other elements. This electron gain is driven by the halogens' strong desire to achieve a stable electron configuration, similar to the noble gases. As a result, halogens have a high affinity for electrons and readily react with other elements to achieve a full valence shell.Rate this question:
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- 32.
Which type of chemical bond is present in Cl2?
- A.
Ionic
- B.
Polyatomic
- C.
Covalent
- D.
Both A & B
Correct Answer
C. CovalentExplanation
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.Rate this question:
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- 33.
In a chemical reaction, an enzyme is generally an example of a…
- A.
Polyatomic Ion
- B.
Inhibitor
- C.
Entropic Molecule
- D.
Catalyst
Correct Answer
D. CatalystExplanation
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.Rate this question:
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- 34.
Which of the following will have the greatest length between atoms?
- A.
Single bond
- B.
Double bond
- C.
Triple bond
- D.
All are Equal
Correct Answer
A. Single bondExplanation
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.Rate this question:
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- 35.
What are these an example of: 1) H3C—CH2—CH2 – CH3 2) CH3 I CH3—CH—CH3
- A.
Enantiomers
- B.
Structural Isomers
- C.
Chiral Compounds
- D.
Butane
Correct Answer
B. Structural IsomersExplanation
The given compounds have the same molecular formula, but different structural arrangements. They have different connectivity of atoms, which results in different chemical and physical properties. Therefore, they are examples of structural isomers.Rate this question:
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- 36.
What is the difference between an Alkyne and an Alkane?
- A.
The alkane possesses a triple bond
- B.
The alkane possesses a functional group attached to it.
- C.
The alkyne possesses a triple bond.
- D.
The alkyne possesses a double bond.
Correct Answer
C. 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.Rate this question:
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- 37.
What functional Group is shown here? CH3—Br
- A.
Thiol
- B.
Aldehyde
- C.
Ketone
- D.
Halide
Correct Answer
D. HalideExplanation
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.Rate this question:
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- 38.
What functional group is shown here? CH3—CH2—OH
- A.
Alcohol
- B.
Amine
- C.
Ether
- D.
Aldehyde
Correct Answer
A. AlcoholExplanation
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.Rate this question:
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- 39.
What functional Group is shown here? CH3CH2OCH2CH3
- A.
Ester
- B.
Ether
- C.
Ketone
- D.
Carboxylic Acid
Correct Answer
B. EtherExplanation
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.Rate this question:
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- 40.
What functional group is shown here? CH3 – CH2—NH2
- A.
Sulfide
- B.
Halide
- C.
Amine
- D.
Nitro Compound
Correct Answer
C. AmineExplanation
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.Rate this question:
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- 41.
What functional group is shown here? CH3 – CH2 – NO2
- A.
Amine
- B.
Aldehyde
- C.
Carboxylic Acid
- D.
Nitro Compound
Correct Answer
D. Nitro CompoundExplanation
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.Rate this question:
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- 42.
What functional group is shown here? CH3 – SH
- A.
Sulfide
- B.
Thiol
- C.
Halide
- D.
Nitrite
Correct Answer
B. ThiolExplanation
The functional group shown in the given compound CH3 – SH is a thiol. Thiols are organic compounds that contain a sulfur atom bonded to a hydrogen atom. In this compound, the sulfur atom is bonded to a methyl group (CH3) and a hydrogen atom (H), indicating the presence of a thiol functional group.Rate this question:
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- 43.
What functional group is shown here? CH3 – S – CH3
- A.
Sulfide
- B.
Thiol
- C.
Halide
- D.
Aldehyde
Correct Answer
A. SulfideExplanation
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.Rate this question:
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- 44.
Which functional group is shown here? O II CH3 – CH2 – C – H
- A.
Ketone
- B.
Alcohol
- C.
Aldehyde
- D.
Carboxylic Acid
Correct Answer
C. AldehydeExplanation
The functional group shown in the structure is an aldehyde. This is indicated by the presence of a carbonyl group (C=O) attached to a carbon atom, which is also bonded to a hydrogen atom. Aldehydes are organic compounds that have a carbonyl group located at the end of a carbon chain. In this case, the carbon chain consists of two carbon atoms (CH3-CH2-C=O), with the aldehyde group (C=O) at the end.Rate this question:
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- 45.
What functional group is shown here? O II CH3 – CH2—CH – CH3
- A.
Aldehyde
- B.
Amide
- C.
Ether
- D.
Ketone
Correct Answer
D. KetoneExplanation
The functional group shown in the given structure is a ketone. A ketone is characterized by a carbonyl group (C=O) bonded to two carbon atoms. In the given structure, the carbonyl group is bonded to two carbon atoms, indicating that it is a ketone.Rate this question:
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- 46.
What functional Group is shown here? O II CH3 – C – O – H
- A.
Carboxylic Acid
- B.
Acid Halide
- C.
Ester
- D.
Thiol
Correct Answer
A. Carboxylic AcidExplanation
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.Rate this question:
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- 47.
How would you name this compound? CH2 / \ CH2 --- CH2
- A.
Isopropyl
- B.
Cyclopropane
- C.
Cyclobutane
- D.
SecButyl
Correct Answer
B. CyclopropaneExplanation
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.Rate this question:
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- 48.
How would you name this compound? H3C–CH2–CH2–CH2–CH2–CH2–CH3
- A.
Hexane
- B.
Nonane
- C.
Heptane
- D.
Butane
Correct Answer
C. HeptaneExplanation
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.Rate this question:
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- 49.
How would you name this compound? H3C–CH2–CH(CH2CH3)–CH2–CH3
- A.
3 methyl hexane
- B.
Heptane
- C.
3 ethyl heptane
- D.
3 ethyl pentane
Correct Answer
D. 3 ethyl pentaneExplanation
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.Rate this question:
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- 50.
How would you name this compound? CH3 – CH2 – O – CH2 – CH3
- A.
Diethyl Ether
- B.
Butane Ether
- C.
Diethyl Ketone
- D.
Cyclopentane
Correct Answer
A. Diethyl EtherExplanation
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.Rate this question:
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