Question

Which of the following is not a Lewis base ?
ag+
H20
CN-
NH3 ,​

Answer 1

Answer:

Lewis base is any species, that donates a pair of electrons to a Lewis acid to form a Lewis adduct, e.g.,hydroxyl ion and ammonia are bases, as they can donate a pair of electrons. Silver cation cannot donate any electron as it is electron deficient while others can donate them

Answer 2

Solution : Lewis base is a species that has at least one nonbonding valence shell electron pair that can be donated to form a coordinate covalent bond. CH4 is not a Lewis base because no atom inCH4 can donate a pair of electrons