Difference between ''round'' and ''around''

I'm copying the following text from some other source:

Round can work as a noun, an adjective, a verb, an adverb and a preposition. Around can work as an adverb or a preposition.

Examples given for each word, when they act as prepositions, are:

around the corner.

round the corner.

Question 1: Please give me an example where around is used as an adverb.

Question 2: Is around being used as a preposition in the following sentence?

Phileas Fogg circumnavigated around the world in 80 days.

Question 3: Which of the following sentences is more correct to say?

1: Is around being used as a preposition in the following sentence?

2: Is around used as a preposition in the following sentence?

Conchita57 wrote:

Jackson6612 wrote: Question 1: Please give me an example where around is used as an adverb. 1.  In the sense of 'surrounding a place': all around was an expanse of white snow. 2.  Meaning 'in an indefinite place': the newspaper must be somewhere around.

Round can work as a noun, an adjective, a verb, an adverb and a preposition. Around can work as an adverb or a preposition. Round and around both can be used as adverb and preposition.

Then are the following sentences if round is used instead of around?

1.  In the sense of 'surrounding a place': all round was an expanse of white snow.

2.  Meaning 'in an indefinite place': the newspaper must be somewhere round.

Jackson6612 wrote:

the newspaper must be somewhere round.

Bokeh wrote:

No! The newspaper is somewhere round. It's on the round table. The newspaper is somewhere green. It's on the lawn.

The newspaper must be somewhere round = The newspaper must be somewhere on the round table.

Would you give an explanation for the above equality?