Free Chemistry of Hydrocarbons MCQs with Answers
1,091 Chemistry of Hydrocarbons MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Hydrocarbons are studied through the structures and reactions of alkanes, alkenes, alkynes and aromatic compounds. Coverage includes free radical substitution in alkanes, electrophilic addition to carbon-carbon multiple bonds, benzene substitution, aromatic stability and the difference between addition reactions of alkenes and substitution reactions of benzene.
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Read the Chemistry of Hydrocarbons notesFree MDCAT chapter notes with key terms1,091 questions · page 44 of 55
- A. The headline read; 'Local Women Saves Geese'.
- B. The headline read, 'Local Women Saves Geese'.
- C. The headline read: 'Local Woman Saves Geese'.
- D. The headline read: "Local Women Saves Geese'
Explanation: This sentence correctly uses a colon to introduce the quotation, which is a common and appropriate use of the colon.
Correct answer: The headline read: 'Local Woman Saves Geese'.- A. The poor reader must be as confused as Media Watch about who has done which to whom.
- B. The poor reader must be as confused as Media Watch about which has done what to whom.
- C. The poor reader must be as confused as Media Watch about whom has done what to who.
- D. The poor reader must be as confused as Media Watch about who has done what to whom.
Explanation: This option is correct. "Who" is used correctly to refer to the subject (people), and "what" and "whom" are used correctly to refer to…
Correct answer: The poor reader must be as confused as Media Watch about who has done what to whom.- A. Propagation
- B. Free radical substitution
- C. Addition
- D. Elimination
Explanation: The correct answer is 'Free radical substitution.' This mechanism involves the substitution of hydrogen atoms in alkanes with halogen…
Correct answer: Free radical substitution- A. Ethane
- B. Ethyne
- C. Ethyl benzene
- D. Ethene
Explanation: Option A is correct as Alkanes are generally unreactive towards oxidizing reagents.
Correct answer: Ethane- A. Carbon, carbon monoxide and hydrogen
- B. Carbon and oxygen
- C. Carbon monoxide and hydrogen
- D. Carbon and carbon monoxide
Explanation: a) Carbon, carbon monoxide, and hydrogen:During the incomplete combustion of a hydrocarbon, if there is not enough oxygen available, the…
Correct answer: Carbon, carbon monoxide and hydrogen- A. Ethene
- B. Ethane
- C. Ethyne
- D. Benzene
Explanation: The explanation for this question will be added soon.
Correct answer: Ethane- A. C2H4
- B. C2H2
- C. C2H6
- D. C2H2Br
Explanation: Higher the s− character means that the Bonded pair electrons are held more closely, ensuring a smaller Bond length and a stronger bond.So…
Correct answer: C2H6- A. 1-Ethyl-2, 4-dimethlycyclohexane
- B. 2-Ethyl-1,4-dimethylcyclohexene
- C. 2-Ethyl-1, 1-dimethylcyclohexane
- D. 4-Ethyl-1, 2-dimethylcyclohexane
Explanation: The IUPAC name of the compound is 1-ethyl-2,4-dimethylcyclohexane. The parent compound is cyclohexane.
Correct answer: 1-Ethyl-2, 4-dimethlycyclohexane- A. C3 - C5 alkanes
- B. C15 - C20 alkanes
- C. C11 - C15 alkanes
- D. C7 - C9 alkanes
Explanation: C7-C9 alkanes: This range of alkanes is the ideal range for use in gasoline.
Correct answer: C7 - C9 alkanes- A. Methane
- B. Ethane
- C. Butane
- D. Nitrogen
Explanation: Natural gas has Methane and ethane contributing to large portions with Methane being 90%, approximately, and ethane, up to 5%.
Correct answer: Butane- A. CnH2n=2
- B. CnH2n
- C. CnH2n-1
- D. CnCH2n-2
Explanation: Option B shows the general formula of cycloalkane, n Is number of carbon is ring
Correct answer: CnH2n- A. CnH2n+2
- B. CnH2n
- C. CnH2n - 1
- D. CnH2n - 2
Explanation: It is because cycloalkane has the same generic formula as the alkenes which is CnH2n.
Correct answer: CnH2n- A. 2, 3 - tetramethyl butane
- B. 2, 2, 3, 3 - tetramethyl pentane
- C. 3, 3, 4, 4 - tetramethyl butane
- D. 3, 4 - bis (dimethyl butane)
Explanation: The longest carbon chain in the compound above is of five carbons as shown in the figure below, hence the correct option must have a…
Correct answer: 2, 2, 3, 3 - tetramethyl pentane- A. Isobutane
- B. Pentane
- C. Neo- pentane
- D. Isopentane
Explanation: Option C: Neo-pentane (CH3-C(CH3)3) does not have secondary or tertiary hydrogens.
Correct answer: Neo- pentane- A. 80%
- B. 5%
- C. 65%
- D. 20%
Explanation: Gasoline produced by fractional distillation is 20% .
Correct answer: 20%- A. Reforming
- B. Distillation
- C. Cracking
- D. Decomposition
Explanation: Reforming is a process in which hydrocarbons are converted into more branched or cyclic hydrocarbons by rearranging the carbon-carbon…
Correct answer: Cracking- A. Cracking
- B. Reforming
- C. Decomposition
- D. Isomerisation
Explanation: Fuels with a higher octane number can be produced by reforming. Reforming is a refining process used in the petroleum industry to increase…
Correct answer: Reforming- A. 100
- B. 95
- C. 9
- D. 89
Explanation: The octane number is a measure of a fuel's ability to resist knocking or detonation during combustion in an internal combustion engine.
Correct answer: 100- A. Reduction reaction
- B. Kolbe's reaction
- C. Clemmensen Reaction
- D. Hydrogenolysis
Explanation: OPTION A: Reduction reactions produce alkanes with unsymmetrical carbon chains, not symmetrical alkanes.OPTION B: Kolbe's Electrolysis…
Correct answer: Kolbe's reaction- A. 0.8
- B. 0.85
- C. 0.7
- D. 0.98
Explanation: Natural gas typically contains about 75-90% methane. So, the correct answer would be 0.85.
Correct answer: 0.85