What will happen if sulfuric acid is poured into a building made of marble stone? Answer: Marble stone is calcium carbonate. Sulfuric acid reacts with it to produce calcium sulphate, carbon dioxide and water. As a result, the building made of marble stone began to deteriorate. CaCO3 + H2SO4 = CaSO4 + CO2 ↑ + […]
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What happens when manganese dioxide reacts with hot concentrated hydrochloric acid? Answer: Heating manganese dioxide with concentrated hydrochloric acid gives off chlorine gas and yields manganese chloride and water. MnO2 + 4HC1 = MnCl2 + Cl2 ↑+ 2H2O
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Q. What happens when sulfur is burned in oxygen? Answer: Combustion of sulfur in oxygen results in the oxidation of sulfur by O2 to produce sulfur dioxide. S + O2 = SO2
Melting is the process by which a substance changes from a solid to a liquid due to the application of heat. The temperature at which a solid substance melts into a liquid at a certain pressure is called the melting point of that substance. Dependence of Melting Point: The melting point of a solid depends
The temperature at which a certain amount of air is saturated with water vapour present in it is called the dew point of that air. The following are some important factors responsible for dew deposition. Factors Responsible for Dew Deposition (i) Cloudless Clear Sky: When there are no clouds in the sky, the surface cools by radiating
The formation of dew depends on various conditions such as Cloudless Clear Sky, Still air, Amount of water vapour in the air, Presence of good emitters and poor conductors of heat, and Presence of objects near the surface. After going through this lesson, you will be able to understand how is dew formed. How is
How is fog formed? If the air is still at night and the air volume is reduced for some reason near the surface, the air becomes saturated with water vapour present in it. Then the saturated vapour accumulates in the form of water particles on the dust particles, coal dust and small particles present in
How are clouds formed? Answer: When air containing water vapour from the earth’s surface becomes lighter and rises, the air expands in volume due to lower air pressure there. As a result, the volume of that air decreases. Moist air becomes saturated as the temperature drops below the dew point. Then the water vapour in
The temperature at which a certain amount of air is saturated with water vapour present in it is called the dew point of that air. Origin of Dew in the air Normally water vapour in the air is unsaturated. At night the surface cools by radiating heat. As a result, the atmosphere near the surface
Condensation is the process by which a substance changes from a vapour state to a liquid state. Experiment on Condensation If some water is boiled in a kettle, steam will escape from the mouth of the kettle. If you hold a cold glass plate near the mouth of the kettle, you will see that water
