What type of chemical reactions take place when
(a) limestone is heated
(b) chlorine liberates bromine from potassium chloride solution
(c) electricity is passed through acidulated water.
(d) Magnesium wire is burnt in air
(e) white precipitate of silver chloride is formed when silver nitrate is added to sodium chloride solution.
Answers
Answer:
1st. decompositin reactn
Answer:
a) When limestone is heated strongly, the calcium carbonate it contains absorbs heat (endothermic ) and decomposes to form calcium oxide. ... Calcium oxide (also known as quicklime) is a key ingredient in the making of cement and is also used to make certain types of plaster.
b) Chlorine is more reactive than bromine and it displaces bromine. If chlorine is added to a solution of potassium bromide, the bromine is replaced by the chlorine forming potassium chloride. Bromine is formed at the same time and can be detected by its colour.
c) When electric current is passed through acidulated water, it will produce electrolysis. During this process, water is decomposed into hydrogen and oxygen. The positive ions with some move to cathode while the negative ions will also move to anode. Hydrogen gas will form at cathode.
d) When the magnesium metal burns it reacts with oxygen found in the air to form Magnesium Oxide. ... After it burns, it forms a white powder of the magnesium oxide. Magnesium gives up two electrons to oxygen atoms to form this powdery product. This is an exothermic reaction
e) When the soluble silver(I) nitrate salt solution is combined with the soluble sodium chloride salt solution, a white precipitate of silver(I) chloride is produced. ... When exposed to light, silver chloride decomposes into gray metallic silver and chlorine.
Explanation:
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