Bikash Agrawal • 304 Reads
Gasoline is used as a fuel in internal combustion engines of motor cars and airplanes. In such engines, a mixture of gasoline vapors and the air is compressed by a piston within the cylinder of the engine and the compressed mixture is ignited by a spark from the spark plug. As the compressed fuel-air mixture burns, considerab...
bibek yadav • 60 Reads
Chemical KineticsThe branch of chemistry which deals with the rate of chemical reactions, the factors affecting the rate of reactions and the mechanism of the reaction is called chemical kinetics.Chemical Reactions on the Basis of Rate of Reaction1.Fast/instantaneous reactions Chemical reaction which completes in less than I...
Those solutions which are standardized by the titration with the primary standard solution are called a secondary standard solution.
The examples of the secondary standard solution are:
When, Ionic Product > Solubility product, precipitation occurs.
Riemann's green is a green pigment ZnO.CoO, which is obtained by heating a mixture of zinc oxide and cobalt nitrate or by the reaction of cobalt nitrate with either or zinc sulphate.
Sigma bond is formed due to the overlapping of orbitals along their intermolecular axis. This leads to the effective overlapping and high electron density along intermolecular axis.
On the other hand, a pi bond is formed due to the sideways overlapping of orbitals. This side-ways overlap is partial and results in low electron density in intermolecular axis.
This is why, a sigma bond is stronger than pi bond.
pH of water at 24°c is 7. What effect does increase in temperature results in pH of water?
1)pH will be more than 7
2) pH will be less than 7
3) pH will be equal to 7
4) can't be determined
Option 2 is correct ans .
Dissociation of water is an endothermic reversible reaction.
When temperature is increased , for an endothermic reaction in equilibrium , it shifts the equilibrium to forward direction i.e. more product is formed which in this case means : more water is dissociated ( more H+ concentration ) is obtained . Ph= negative logarithm of H+ concentration so, more H+ concentration means, lesser Ph. so , whole ph range gets changed when temperature is increased i.e at that time, our neutral point is lesser than 7 but, still water is neutral !