Sentence: The police fired a round of tear gas shells.

[Kamnashish]

I want to ask a question

Here is the usage of the word round.

Which of the sentence is incorrect.

Round
1. The police fired a round of tear gas shells.
2. The shop is located round the corner.
3. We took a round on the merry-go-round.
4. The doctor is on a hospital round.
5. I shall proceed further only after you come round to admitting it.

Please tell me the reason also.
I think the (5) one is incorrect.
Another one.

which one of the two sentences is correct or is both the sentences correct.

In response to the allegations and condemnation
or
In response to the allegations and condemnationS

Is the plural of condemnation required here. Please pour in your views.