Examples from the Web for tellurous
Heated still more strongly, it becomes milk-white, oxygen is expelled, and it is converted into tellurous acid.
Telluric acid produces the same reactions with the blowpipe reagents as tellurous acid.
Telluric acid is reduced to tellurous (with evolution of chlorine) on boiling with hydrochloric acid.A Textbook of Assaying: For the Use of Those Connected with Mines.|Cornelius Beringer and John Jacob Beringer
This solution is colorless, and is tellurous acid, dissolved in sulphuric acid.