Structural formulas (A) to (F) of species with the formula HNCO (isocyanic acid, its contributors and its isomers) are given below.
How many of the structures (A) to (F) contain at least one formal charge ?

Question

Structural formulas (A) to (F) of species with the formula HNCO (isocyanic acid, its contributors and its isomers) are given below.

How many of the structures (A) to (F) contain at least one formal charge ?

resonance structures HNCO

TestHub · Accepted Answer

B ( O + , N − ), C ( O − , N + ), D ( O − , C + ) and F ( N + , O − ) are charged. A and E are neutral. Number = 4.

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