Advertisements
Advertisements
प्रश्न
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
Can you change rust back into iron by some simple method?
Advertisements
उत्तर
No, rusting is a chemical change and cannot be reversed.
APPEARS IN
संबंधित प्रश्न
What do you observe when iron nail is kept in copper sulphate solution for sometime.
Explain the following reaction with one suitable example of Double decomposition reaction.
Name the type of chemical reaction shown by the following equation :
Fe2O3 + 2Al → Al2O3 + 2Fe
Give reason for the following:
Silver nitrate solution is kept in coloured bottles.
Give a chemical test to distinguish between the following gases.
NH3 and SO2
Select the correct answer for the following options:
The gas obtained when potassium chlorate is heated in the presence of a catalyst.
A reaction between an acid and a base is called ______.
A student took a solution of copper sulphate in a beaker and put a clean iron nail into it and left it for about an hour.
What changes do you expect?
Galvanization is a process in which ______ is coated as a layer of iron.
Magnesium + oxygen → magnesium oxide.
2Mg + O2 → 2Mg O
