Which of the following statements is false?

Question

Which of the following statements is false? (A) HCl molecule has one sigma bond (B) Acetylene molecule has three pi bonds and three sigma bonds (C) Ethylene molecule has five sigma bonds and one pi bond (D) Water molecule has two sigma bonds and two lone pairs

Tardigrade Admin · Accepted Answer

Here

Acetylene molecule has 3σ bonds and 2π bonds. H-Cl has only one sigma bond so it is correct. In water there are 2 sigma bond and 2 lp electrons so it is also correct. Solution

Ethylene has also 5 sigma and one pi bonds so it is also correct. Solution

Q. Which of the following statements is false?

HCl molecule has one sigma bond

Acetylene molecule has three pi bonds and three sigma bonds

Ethylene molecule has five sigma bonds and one pi bond

Water molecule has two sigma bonds and two lone pairs

Here
Acetylene molecule has $3 σ$ bonds and $2 π$ bonds.
H-Cl has only one sigma bond so it is correct.
In water there are 2 sigma bond and 2 lp electrons so it is also correct.

Ethylene has also 5 sigma and one pi bonds so it is also correct.