Q57 of 152 Page 48

You are given the following chemical equation:

Mg (s) + CuO (s) → MgO (s)+ Cu(s)


This equation represents:

Here, Magnesium is oxidized and copper is displaced from its compound.

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55 Which of the following can be decomposed by the action of light? 56 Consider the reaction:


This is an example of:

 58 When a green iron salt is heated strongly, its colour finally changes to brown and odor of burning sulphur is given out.

(a) Name the iron salt.


(b) Name the type of reaction that takes place during the heating of iron salt.


(c) Write a chemical equation for reaction involved.

 59 A colourless lead salt, when heated, produces a yellow residue and brown fumes.

(a) Name the lead salt.


(b) Name the brown fumes.


(c) Write a chemical equation of the reaction involved.