What is the largest country in the Commonwealth by area?

Which of the following countries is NOT one of the top 10 largest countries by land area? Which country is the 8th largest country by land area? Which country is the 9th largest country by land area? What is the largest country in the Middle East by area? Which country is the largest in the Arab world by area? What is the smallest country in the world, both in terms of population and land area? Which of the following countries is an independent city-state with a land area of approximately 2.02 km²? What is the smallest country in South America by land area?