Frank ICSE Solutions for Class 9 Chemistry - Practical Work PAGE NO :170 Solution 1: On heating certain solids they don't melt and directly get converted to their gaseous form, this process of direct conversion of solids to their gaseous form is called as sublimation. For ex: camphor and ammonium chloride undergo sublimation.Solution 2: Decrepitation is a process of … [Read more...] about Frank ICSE Solutions for Class 9 Chemistry – Practical Work