Free Alkanes MCQs with Answers
127 Alkanes MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Alkanes are saturated hydrocarbons containing only carbon-carbon and carbon-hydrogen single bonds, with the general formula CnH2n+2 for open chains. Their structure, isomerism, IUPAC nomenclature, physical properties, combustion, free-radical halogenation and conformations are covered, including the difference between substitution in alkanes and addition in unsaturated hydrocarbons.
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127 questions · page 7 of 7
- A. Cyclopropane and cyclobutane are liquids at room temperature.
- B. Cycloalkanes are insoluble in ethanol and ether but soluble in water.
- C. Their melting and boiling points show a gradual increase with increases molecular weight.
- D. Both (B) & (C) are correct
Explanation: The longer the alkane gets (higher molecular weight), the more intermolecular forces are present (London Dispersion), and this increases…
Correct answer: Their melting and boiling points show a gradual increase with increases molecular weight.- A. Cyclobutane
- B. Hex-1-ene
- C. Cyclopropane
- D. Propene
Explanation: Hex-1-ene is more stable because the stability of unsaturated hydrocarbons like nitriles, alkenes effects with hyper conjugation.
Correct answer: Hex-1-ene- A. C6H12
- B. C6H14
- C. C5H10
- D. C5H12
Explanation: The equation is as follows: 2 C3H7COONa + 2 H2O→ C6H14 + 2 CO2 + 2 NaOH + H2
Correct answer: C6H14- A. More stable
- B. Less energetic
- C. More reactive
- D. Obey the general formula of normal alkanes
Explanation: Angle strain occurs when bond angles deviate from the ideal bond angles to achieve maximum bond strength in a specific chemical…
Correct answer: More reactive- A. Haber process
- B. Destructive distillation
- C. Fischer - Tropsch process
- D. Fractional distillation
Explanation: Coal can be converted to petroleum through a process known as destructive distillation.
Correct answer: Destructive distillation- A. CO and H2
- B. CO2 and H2
- C. C and H2
- D. All of these
Explanation: The Fischer-Tropsch synthesis involves the formation of alkanes by the combination of carbon monoxide (CO) and hydrogen gas (H2).
Correct answer: CO and H2- A. Coal
- B. Carbon black
- C. Petroleum
- D. Coal tar
Explanation: The term "black gold" is commonly used to refer to petroleum. This nickname comes from the fact that petroleum is a valuable natural…
Correct answer: Petroleum