Question

22. The bond length decreases from C-C to C=C d ie to
(a) Increase in of 'H' atom
(c) Increase in 'p' character
23 Which of the following statements is correct ?
(b) Decrease 's character
(d) Decrease 'p' character​

Answer 1

Answer:

Decrease 's character

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Answer 2

The bond length decreases from $C-C$ to $C=C$ due to a decrease in p character.

1. Alkenes have the strongest bond This is because in alkenes there are 2 bonds between at least two carbons (that is 4 electrons). So the bond enthalpy (energy required to break the bond) is maximum
2. Since the Bond Strength of Aleynes is strongest among them, Alkanes have the least Bond Length and Alkenes have the highest Bond Length in comparison to Alkanes
3. In Alkenes the hybridization is $sp^{2}$ hybridization ie. it is the mixing of one $s$ and two $p$ atomic orbitals.
4. Whereas in Alkanes , the hybridization is $sp^{3}$ hybridization ie. it is the mixing of one $s$ and three $p$ atomic orbitals.