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ZnO appears yellow upon heating due to the formation of zinc oxide nanoparticles. The optical properties of the nanoparticles can cause a shift in the absorption spectrum, leading to the yellow color. This change in color is often attributed to the quantum confinement effect that occurs at the nanoscale level.
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What is the word equation for heating zinc with air?
The word equation for heating zinc with air is: zinc + oxygen → zinc oxide.
Why methyl orange is used as indicator in determination of ZnO?
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.
Is ZnO soluble in water?
Zinc oxide (ZnO) is not very soluble in water.
What metal reacts with steam to give an oxide that is yellow when and white when cold?
Iron reacts with steam to give iron(III) oxide, which is yellow when hot and white when cold.
What is the reaction for h2so4 plus zno?
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.
What is the word equation for heating zinc with air?
The word equation for heating zinc with air is: zinc + oxygen → zinc oxide.
Why Heating zinc oxide is a physical change Why?
It is a physical change. I goes from white, to yellow, back to white.
Why methyl orange is used as indicator in determination of ZnO?
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.
What is you-ZnO?
ZnO is the chemical formula of the zinc oxide.
What is a chemical change a.Heating of ZnO b.magnetization of iron c.heating of sulfur d. radioactivity?
heating of sulfur in presence of oxygen (or air) is a chemical change.
Is yellow flames are ideal for heating?
NO
Is ZnO soluble in water?
Zinc oxide (ZnO) is not very soluble in water.
What metal reacts with steam to give an oxide that is yellow when and white when cold?
Iron reacts with steam to give iron(III) oxide, which is yellow when hot and white when cold.
What is the name of the compound ZnO?
The compound ZnO is called zinc oxide.
Which solid turns yellow on heating?
Sulfur turns yellow when heated.
What is the reaction for h2so4 plus zno?
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.
Why are stars yellow?
Stars appear yellow due to their temperature. Yellow stars, like our sun, have a surface temperature around 5,500 degrees Celsius, which corresponds to the color yellow. Cooler stars can appear more red, while hotter stars can appear more blue.
