Chemical Bonding and Molecular Structure questions
1784 published questions with worked solutions.
- Select the strongest bond among the following:
- Which of the following compounds is most polar?
- Carbon tetrachloride has no net dipole moment because of
- As the hybridisation of a carbon atom changes from sp³ to sp² and then to sp, the bond angle between the hybrid orbitals
- The hybridisation state of a carbene carbon in its singlet state is
- Which structure below carries a formal positive charge on the oxygen atom?
- The C–C bond order in benzene is close to
- The correct symbol relating the two Kekulé structures of benzene is
- Benzene is a resonance hybrid mainly of two Kekulé structures. Hence
- The carbon–carbon orbital overlap in benzene (forming the σ-framework of the ring) is of the type
- In benzene, the C–C bond length is 1.39 Å; the C–H bond length is close to
- The dipole moment of *p*-nitroaniline, compared with that of nitrobenzene (X) and aniline (Y), is
- The number of σ- and π-bonds in a molecule of benzene is
- Which of the following has the greatest (total) resonance energy?
- Among the following, how many have at least one *sp³*-hybridised carbon atom: acetylene, dimethyl ether, propan-1-ol, ethane,...
- Total number of sigma and pi bonds present in C₆H₅–CH=CH–CHO (cinnamaldehyde) are ________.
- Total number of lone pairs and bond pairs present on/around the carbon of the methyl carbanion, CH₃⁻, is ________.
- Some reaction intermediates are given: CH₃⁺, CH₃•, CH₃⁻. In how many of these does the carbon atom undergo *sp²* hybridisation?
- How many resonance structures are possible for the allyl carbocation, CH₂=CH–CH₂⁺?
- How many σ-bonds are present in the enolic form of acetaldehyde, CH₂=CH–OH (vinyl alcohol)?
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