"The only country..." By Continent

Do you know the countries that are the only ones of their kind per each continent?
If I have made any errors please correct me, or suggestions for better ideas are welcome.
Quiz by HelveticaBold
Last updated: November 21, 2016
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First submittedApril 27, 2016
Times taken961
Average score62.5%
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North America
The only country that has four borders
The only country without red, white or blue on its flag
The only country with Creole as an official language
The only country that does not have a coast on the Atlantic
El Salvador
South America
The only country who's capital begins with a vowel
The only country with coast on the Atlantic & Pacific oceans
The only country with Dutch as an official language
The only country that is a member of OECD
The only country with the death penalty
The only country where the capital city contains the word 'city'
Vatican City
The only country that has won Eurovision but never hosted it
The only country with '&' in its name
Bosnia & Herzegovina
The only country that doesn't use the metric system
The only diarchy (country with two leaders)
The only country where Malagasy is an official language
The only enclave country
The only country where the capital is the same name as the country
The only neutral country
The only country with Portuguese as an official language
The only doubly landlocked country
The only country with gay marriage
New Zealand
The only country that shares a land border
Papua New Guinea
The only country with a king
The only country that Britain hasn't invaded
Marshall Islands
Level 70
Apr 28, 2016
Great quiz. Could use another minute, but it's cool
Level 65
Apr 28, 2016
Ecuador also doesn't border Brazil.
Level 76
Apr 28, 2016
esatto - also, in what sense is Turkmenistan 'neutral'? nice quiz!
Level 71
Apr 28, 2016
Thanks very much. I've added more time and fixed the error. It's easy to miss little Ecuador all tucked away down there. And Turkmenistan is one of the 'permanently neutral' countries which are ones that are bound by international treaty (I think the Hague Convention) to be neutral in future wars, Turkmenistan's neutrality was formally recognised by the UN in 1995. ^_^ Thanks again lovely quizzers.
Level 71
Apr 29, 2016
Ironically the guess rate for Chile has actually gone down since changing the clue from an incorrect one to a correct one! I must have not been the only one to make that error.
Level 73
May 27, 2016
I love the one about "the only country that Britain hasn't invaded" lol that could be an idea for another quiz, countries that haven't been invaded by Britain by continent
Level 83
Jul 23, 2016
Interesting quiz! I didn't know that about Belarus.
Level 65
Aug 28, 2016
Awesome quiz! I learned a lot.
Level 44
Nov 20, 2016
This really is an excellent quiz. Another minute would be great for first-time-takers, I think.
Level 37
Aug 24, 2018
Lesotho is not the only enclave country in Africa. Gambia is also an enclave country. It is surrounded by Senegal.
Level 71
Aug 24, 2018
You are quite right in a practical sense, however Gambia does have a minute amount of coast on the Atlantic.
Level 75
Feb 16, 2020
About "The only country with coast on the Atlantic & Pacific oceans", Chile definitely touches both oceans. Even Argentina is counted in here, List of countries bordering on two or more oceans.
Level 58
Apr 1, 2020
Kuwait also has the same name is it's capital
Level 61
Apr 3, 2020
chile has a small coast on the atlantic ocean
Level 61
Apr 6, 2020

Kuwait's capital is kuwait city.

Level 39
May 8, 2020
Eswatini could be accepted now
Level 52
Jun 20, 2020
Australia now has gay marriage