it sounds wrong and its incorrect english
"That was wrong" is a grammatically correct sentence.
There is nothing wrong with that sentence.
There is no wrong with sentence to end with also. For example, We can do this work also.
In the sentence, "In your opinion the president was wrong about that." "that" is a pronoun. Its antecedent is presumably in a preceding sentence.
The answer I gave was wrong.
Nothing is wrong with that
It is NOT a sentence.
The sentence is correct. There is nothing wrong with it.
"What"
Nothing is wrong with that
Nothing is wrong the sentence is good
There is nothing wrong.