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Alkanes Answer Key

Hydrogenation involves the production of ethane by reacting hydrogen with ethene. Classify ethene and ethane as being either saturated or unsaturated, and explain your answer.
  • Ethene is unsaturated, because it consists of a double bond. Ethane is saturated, because it consists of only single bonds.
Which of the following alkanes contains a [math](CH_3)_2CH-[/math] group?
  1. 2, 2-Dimethylpentane
  2. 3,3-Dimethylpentane
  3. 2,3-Dimethylpentane
  4. 3,4-Dimethylhexane
A student named an alkane 2-ethylpropane. The correct IUPAC name of the alkane is
  1. 2-Methylbutane.
  2. 2,2-Dimethylbutane.
  3. 2,3-Dimethylbutane.
  4. 2,3-Dimethylpentane.
Paraffin wax contains alkanes ranging from
  1. [math]C_5 to C_9[/math]
  2. [math]C_10 to C_15[/math]
  3. [math]C_16 to C_20[/math]
  4. [math]C_21 to C_30[/math]
An alkane is obtained by decarboxylation of sodium propionate. The same alkane can be obtained by
  1. catalytic hydrogenation of propene.
  2. action of sodium metal on iodomethane.
  3. reduction of 1-chloropropane.
  4. reduction of bromomethane.
Which of the following alkanes is a liquid at room temperature?
  1. [math]C_4H_10[/math]
  2. [math]C_10H_22[/math]
  3. [math]C_22H_46[/math]
  4. [math]C_46H_94[/math]
Which of the following alkanes cannot be prepared by the Wurtz reaction?
  1. Methane
  2. Ethane
  3. Propane
  4. Butane
Which of the following is an aliphatic saturated hydrocarbon?
  1. [math]C_6H_6[/math]
  2. [math]C_6H_10[/math]
  3. [math]C_6H_12[/math]
  4. [math]C_6H_14[/math]
Which of the following represents a saturated hydrocarbon?
  1. ethene
  2. butane
  3. propyne
  4. methanol
Which of the following conversions is an example of a substitution reaction?
  1. Acetylene [math]rarr[/math] Ethane
  2. Sodium acetate [math]rarr[/math] Methane
  3. Propylene [math]rarr[/math] Propane
  4. Ethane [math]rarr[/math] Chloroethane

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