Question

hybridization of propane and propyne​

Answer 1

Answer:

Propene is: CH2=CH-CH3. The 1st and 2nd carbon atoms are in sp2 hybridization as they had to form 3 sigma bonds each. The 3rd one had to form all 4 sigma bonds. Hence it undergoes sp3 hybridization.

Any electron groups that are lone pairs can make more bonds. Thus, they all count towards the total number of possible bonds that can be made in the future. Since the left carbon has four electron groups (what is the electron geometry?), it has sp3 hybridization ( 1+3=4 ).