Chemistry · Hydrocarbons
Work through this past-paper style MCQ, then read the full explanation. Practice more chemistry questions on mMCQ with adaptive practice and topic analytics.
In following molecules which one has the shortest C-C bond length?
- A
C3H8
- B
C2H6
- C
C2H4
- D
C2H2
The bond lengths in the given molecules are:
- C3H8 (propane): 1.54 Å (single bond)
- C2H6 (ethane): 1.53 Å (single bond)
- C2H4 (ethylene): 1.33 Å (double bond)
- C2H2 (acetylene): 1.20 Å (triple bond)
The shortest C-C bond length is found in acetylene (C2H2), which has a triple bond between the two carbon atoms. This is because triple bonds are shorter than double bonds, which are shorter than single bonds.
C3H8 (propane): has single bonds, which are longer than triple bonds.
C2H6 (ethane): has single bonds, which are longer than triple bonds.
C2H4 (ethylene): has a double bond, which is longer than a triple bond
The bond lengths in the given molecules are:
- C3H8 (propane): 1.54 Å (single bond)
- C2H6 (ethane): 1.53 Å (single bond)
- C2H4 (ethylene): 1.33 Å (double bond)
- C2H2 (acetylene): 1.20 Å (triple bond)
The shortest C-C bond length is found in acetylene (C2H2), which has a triple bond between the two carbon atoms. This is because triple bonds are shorter than double bonds, which are shorter than single bonds.
Tagged under Chemistry · Hydrocarbons · 2023