why does white Zn0(s) becomes yellow upon heating ?

Which of the following metal oxide is white in colour but become yellow on heating

Why does borax swell up on heating?

NH_(3) solution was added to four semple solution in difference test tube and found the following observation about the precipitate. a. White ppt which is solution in oxcess of NH_(3) solution b.On heating which is white in cold but yellow on heating c. The cation present in (b) forms white ppt , with hypo solution which give black ppt on heating d. The cation present in (c ) forms soluble complex with excess of NH_(3) solution White ppts in (a),(b) and (c ) respectively obtained are

Why does white zinc oxide on heating become yellow ?

Why does not formic acid form an anhydride upon heating?

Why does sharp glass edge become smooth on heating it upto its melting point in a flame ? Explain which property of liquids is responsible for this phenomenon.

Carbon tetrachloride does not give a white precipitate upon heating with silver nitrate solution. Is it correct ?

A piece of iron is heated in a flame. It first becomes dull red then becomes reddish yellow and finally turns to white hot. The correct explanation for the above observation is possible by using.

A piece of iron is heated in a flame. It first becomes dull red then becomes reddish yellow and finally turns to white hot. The correct explanation for the above observation is possible by using.

sodium peroxide which is a yellow solid, when exposed to air becomes white due to the formation of: