Advertisements
Advertisements
प्रश्न
Why nitric acid is not used in the preparation of hydrogen?
Advertisements
उत्तर
Nitric acid is a powerful oxidising agent, and the oxygen formed due to its decomposition oxidises hydrogen to give water thus defeating the purpose of the reaction.
3Zn + 8HNO3 → 3Zn(NO3)2 + 4H2O + 2NO
APPEARS IN
संबंधित प्रश्न
Fill in the blank
Hydrogen is ...................soluble in water.
Give reason for the following:
Though hydrogen is lighter than air it cannot be collected by downward displacement of air.
Why are the following metals not used in the lab. preparation of hydrogen?
aluminium
Select the correct options for the following statement:
The acid _____ is not Used in the laboratory preparation of hydrogen, using zinc and an acid.
Select the correct options for the following statement:
A foul smelling gas formed when hydrogen reacts with a molten non-metal, is ___.
Complete and balance the equation:
[General method]
Reactions of active metals - cold water
Calcium - Ca + H2O → ______+ _______ [g]
Complete and balance the equation:
[General method]
Reactions of metals with dilute acids
Magnesium - Mg + 2HCl → ______+ _______ [g]
Name an element whsich reacts violently with water at room temperature.
Give a balanced equation for the following conversion.
\[\ce{ZnO<-H2O->Fe3O4}\]
Give a balanced equation for the following conversion.
\[\ce{NH3<-H2->H2S}\]
