Advertisements
Advertisements
प्रश्न
Give a reason why zinc displaces hydrogen from dilute sulphuric acid but copper does not.
उत्तर
Zinc (more electropositive) and being above [H] inactivity series displace hydrogen from dilute sulphuric acid but copper is below [H] in electrochemical series cannot displace hydrogen from sulphuric acid.
APPEARS IN
संबंधित प्रश्न
Explain, giving one example of the following chemical change:
Thermal dissociation
State the type of reactions for the following represent and balance the ones that are not balanced.
2KClO3→ 2KCl + 3O2
State the type of reactions for the following represent and balance the ones that are not balanced.
CuO+H2→ Cu+ H2O
The reaction can be classified as:
State which of the following type, take place in the reaction is given below.
\[\ce{Cl2 + 2Kl->2KCl + l2}\]
Give a balanced equation for thermal decomposition of ammonium dichromate
Name a metallic oxide which on thermal decomposition is reduced to metal.
State how displacement reaction represented.
Define the term – double decomposition – neutralization reaction.
Give a balanced equation for the following type of reaction:
A soluble salt of lead formed from an insoluble base by double decomposition – neutralization.
Differentiate between the following:
Decomposition reaction and a double decomposition reaction.