Heating a limestone at around 1000∘C leads to a chemical reaction. This can be most easily confirmed by
looking at the color change of the solid
smelling the gas evolved
watching the color of the gas evolve
none of the above
Hence the correct option would be D) None of these,
No chemical reaction takes place when granules of a rusty-brown solid A are mixed with the powder of another solid B. However when the mixture is heated, a reaction takes place between. It's components. One of the products C is a metal and settle down in the molten state while the other product D floats over it. It was observed that the reaction is highly exothermic. (a) What could the solids A and B be? (b) What are the products C and D most likely to be? (c) Write the chemical equation for the reaction between A and B leading to the formation of C and D. mention the physical states of all the reactants and products in this equation and indicate the heat change which takes place. (d) What is the special name of such a reaction? State one use of such a reaction. (e) Name any two types of chemical reactions under which the above reaction can be classified.
Limestone changes into quicklime and carbon dioxide on strong heating. This is an example of a chemical change
Strong heating of ferrous sulphate leads to the formation of a brown solid and two gases. This reaction can be categorised as
How can a geologist confirm whether a sample of rock is limestone?