on heating,free electrons occupy spaces created by loss of oxygen from zno and turn yellow :)
Zinc Oxide -----> Yellow Crystals (White) HEAT <----- COOL
Methyl orange is used as an indicator in the determination of ZnO because it changes color from red to yellow at a pH range of 3.1-4.4, which is suitable for the titration of ZnO with a strong acid like hydrochloric acid. This color change helps in determining the endpoint of the titration accurately.
Iron reacts with steam to give iron(III) oxide, which is yellow when hot and white when cold.
Zinc oxide (ZnO) is not very soluble in water.
The reaction between sulfuric acid (H2SO4) and zinc oxide (ZnO) produces zinc sulfate (ZnSO4) and water (H2O). The balanced chemical equation for this reaction is: H2SO4 + ZnO → ZnSO4 + H2O.
Zinc Oxide -----> Yellow Crystals (White) HEAT <----- COOL
It is a physical change. I goes from white, to yellow, back to white.
Methyl orange is used as an indicator in the determination of ZnO because it changes color from red to yellow at a pH range of 3.1-4.4, which is suitable for the titration of ZnO with a strong acid like hydrochloric acid. This color change helps in determining the endpoint of the titration accurately.
ZnO is the chemical formula of the zinc oxide.
heating of sulfur in presence of oxygen (or air) is a chemical change.
Iron reacts with steam to give iron(III) oxide, which is yellow when hot and white when cold.
NO
Zinc oxide (ZnO) is not very soluble in water.
The compound ZnO is called zinc oxide.
Sulfur turns yellow when heated.
The reaction between sulfuric acid (H2SO4) and zinc oxide (ZnO) produces zinc sulfate (ZnSO4) and water (H2O). The balanced chemical equation for this reaction is: H2SO4 + ZnO → ZnSO4 + H2O.
Some stars appear yellow because either they are yellow or the white color can appear different. The spectral types F and G (our sun), contain yellow stars. This is caused by their temperature.