Question

a substance on heating leaves no residue in test tube

Answer 1

Answer:

Ammonium nitrate leaves no residue when heated.

Answer 2

Answer:The substance is camphor, for instance.it is a common sublime i.e. it changes its form directly into vapour from solid, without turning into liquid, when heated and vice versa

the equation is:

2 C₁₀H₁₆O + 27 O₂ → 20 CO₂ + 16 H₂O

Explanation: