Concept explainers
Interpretation:
Concerning alkane and cycloalkane boiling points, the incorrect ones has to be chosen from the given options.
Concept Introduction:
Organic compounds are represented shortly by the molecular formula and structural formula. Each and every compound has its own molecular formula. Compounds can have same molecular formula but not same structural formula.
Alkanes and cycloalkanes are hydrocarbons. They are nonpolar molecules. Water is a polar molecule. Therefore, alkanes and cycloalkanes do not get solubilized in water. In other words, alkanes and cycloalkanes are insoluble in water.
Regarding density, alkanes and cycloalkanes have density lower than water. When alkanes and cycloalkanes are mixed with water, two layers are formed which is a result of insolubility. Alkanes and cycloalkanes are present on top of water layer which is due to lesser density.
Boiling point of alkanes and cycloalkanes increase with an increase in carbon‑chain length or the ring size. When considering the continuous‑chain alkanes, the boiling point of alkanes increases about
When branching happens in the carbon chain, it lowers the boiling point of alkanes. In simple words, unbranched alkanes have more boiling point than branched alkanes with the same number of carbon atoms.
Cycloalkanes have more boiling point compared to noncyclic alkanes with the same number of carbon atoms. This is due to the more rigid and more symmetrical structures that occur in cyclic systems. Cyclopropane and cyclobutane are gases at room temperature. Cyclopentane to cyclooctane are liquids at room temperature.
Want to see the full answer?
Check out a sample textbook solutionChapter 12 Solutions
General, Organic, and Biological Chemistry
- How many primary methylenes are in structure A? Numeric response only. Answer: Ne: Optical cice pring Rotation ump to Warrow_forwardThe IUPAC name for the alkane is a. methane pentane b. methylpentane c. 2-methylpentane d. no correct responsearrow_forwardWhich of the following is a structural isomer of 2-methylbutane? a. 2,2-dimethylpropane b. butane c. 2,3-dimethylbutane d. more than one response is correct e. no correct responsearrow_forward
- 19. What is the correct IUPAC name for the hydrocarbon with the following carbon-skeleton formula? C-c-C.c a. 2-ethyl-2-methylethene Ob. 2-ethyl-1-propene c. 2-methyl-1-butene d. 2-methylbutane e. no correct responsearrow_forwardPartial Question 14 Which of the following statements is true? (Select all that apply.) None of these The higher the molar mass of an alkane, the higher the boiling point. The shorter the carbon chain in a straight chain alkane, the higher the melting point of the alkane. The presence of branches off the main chain in an alkane will have no affect on the melting point of the alkane. .. 10 When comparing the melting points of isomers of an alkane, the more branches an isomer has the lower the melting point.arrow_forwardWhat functional groups are present in gingerol? gingerol Check all that apply. ester ether O phenol ketone Oaldehyde O alcohol Oalkene Submit Request Answer Part D What functional groups are present in shogaol? Check all that apply. O alkene O alcohol O ketone O aldehyde Ophenol ether esterarrow_forward
- Choices a) carotene is the most non polar. b) Xantophyll is yellow spot. c) carotene has the highest rf value. d) ch b has the highest rf valuearrow_forward10. Which of the following structural formulas represents a normal alkane? CH;-CH2-CH-CH; CH CH3-CH,-CH2 CH, CH3 b. c. SH-CH, CH-CH, CH3 od. CH3-C-CH3 e. no correct responsearrow_forwardHow many isomers of octane have only 1°, 2°, and 4° carbon atoms (in the same molecule)? O 2 O 1 4 Correct Answer: 3 O 3arrow_forward
- 12. Which of the following cannot possibly be a correct IUPAC name? a. 2-methylpentane b. 2-ethylpentane c. 3-methylpentane d. 3-ethylpentane e. no correct responsearrow_forward12. Which of the following cannot possibly be a correct IUPAC name? a. 2-methylpentane b. 2-ethylpentane Oc. 3-methylpentane O d. 3-ethylpentane O e. no correct responsearrow_forward
- General, Organic, and Biological ChemistryChemistryISBN:9781285853918Author:H. Stephen StokerPublisher:Cengage LearningOrganic And Biological ChemistryChemistryISBN:9781305081079Author:STOKER, H. Stephen (howard Stephen)Publisher:Cengage Learning,