Grapes hanging on the plant do not ferment but after being plucked from the plant can be fermented. Under what conditions do these grapes ferment? Is it a chemical or a physical change?
Important Questions on Chemical Reactions and Equations
Evaporation of petrol is a physical or chemical change?
Burning of Liquefied Petroleum Gas (LPG) is a physical or chemical change?
Heating of an iron rod to red hot is a physical or chemical change?
Curdling of milk is a physical or chemical change?
Sublimation of solid ammonium chloride is a physical or chemical change?
During the reaction of some metals with dilute hydrochloric acid, following observation were made. Explain this observation giving suitable reasons.
Silver metal does not show any change.
During the reaction of some metals with dilute hydrochloric acid, following observation were made. Explain this observation giving suitable reasons.
The temperature of the reaction mixture rises when aluminium is added.
During the reaction of some metals with dilute hydrochloric acid, following observation were made. Explain this observation giving suitable reasons.
The reaction of sodium metal is found to be highly explosive
