The oxide that remains unchanged when heated in hydrogen ...
The oxide that remains unchanged when heated in hydrogen is?
CuO
Fe2O3
PbO2
ZnO
Correct answer is D
Zinc oxide doesn't react to hydrogen gas because the reaction is not spontaneous.
The maximum number of isomers for an alkene with molecular formula C4H8 is ...
What is the chemical symbol for Hafnium? ...
Which of the following hydrogen halides the highest entropy value? ...
If 1003 of a saturated solution of sodium tetraoxosulphate (VI) at 30° C contains 10.5 g of...
Ethanol reacts with excess acidified K2Cr2O to produce...
The reaction between ethanoic acid and sodium hydroxide is an example of...
Alkanals can be differentiated from alkanones by reaction with? ...
In which of the following reactions does hydrogen peroxide act as a reducing agent?...
The dissolution of common salt in water is a physical change because ...