which-of-the-following-is-not-a-characteristic-of-quaternary-ammonium-compounds

Question

Which of the following is NOT a characteristic of quaternary ammonium compounds?

Accepted Answer

Strong bactericidal activity against gram-negative bacteria

Answer

Bactericidal action mainly due to disruption of the cell membrane

Answer

Derived from the four-valence ammonium ion

Answer

Pseudomonas species are resistant to them