Q. Consider the following:

1. Gold is classified as a metal
2. Sulphur is classified as a non-metal
3. Silicon is classified as a metalloid

Which of the above statements is / are correct?
Answer: 1, 2 and 3
Notes: All the given statements are correct. Gold is a well-known metal, sulphur is a typical non-metal, and silicon is correctly classified as a metalloid due to its intermediate properties between metals and non-metals. Thus, all three are correctly matched according to their standard chemical classifications.