Statement-I says that Switzerland is one of the leading exporters of gold in terms of value, which is correct. Switzerland is a top exporter of gold due to its prominent refining industry. It refines a significant portion of the gold production around the world before exporting it.

Statement-II states that Switzerland has the second-largest gold reserves in the world, which is not accurate. Although Switzerland has substantial gold reserves, it does not rank second. Countries like the United States, Germany, Italy, and France have larger gold reserves.

So, dispelling the incorrect claim in Statement-II, we have the correct answer as option-3: Statement-I is correct but Statement-II is incorrect.