Question

1. which molecule is associated with sp hybridization and has a linear geometry?

a. phosphorus pentachloride (pcl₅)
b. ethene (c₂h₄)
c. methane (ch₄)
d. acetylene (c₂h₂)

Explanation:

1. Phosphorus pentachloride ($PCl_5$) has $sp^3d$ hybridization and trigonal - bipyramidal geometry.
2. Ethene ($C_2H_4$) has $sp^2$ hybridization and planar geometry.
3. Methane ($CH_4$) has $sp^3$ hybridization and tetrahedral geometry.
4. Acetylene ($C_2H_2$) has $sp$ hybridization and linear geometry.

Answer:

d. Acetylene ($C_2H_2$)