Choose the correct answer:
  
1. Riya put a puzzle to solve for her friends. Help them to solve Riya’s puzzle. “X is a homogeneous mixture. X do not shows the path of the light that passes through it. X's particle size is \(>1 nm\). What is X?”
 
2.__________ is the name of the substance where the dispersed phase is gas and dispersed medium is solid.