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Write a long answer to the following questions:
Give the characteristic tests for the following gases
(a). \(CO_2\)
(b). \(SO_2\)
(c). \(O_2\)
(d). \(H_2\)
(a). \(CO_2\)
(b). \(SO_2\)
(c). \(O_2\)
(d). \(H_2\)
a. Analysis of \(CO_2\) gas (lime water test) when carbon dioxide gas is injected into lime water, it becomes milk as insoluble calcium carbonate is formed.
If the gas is too high, the milk will disappear as soluble calcium bicarbonate is formed.
b. Test for (\(SO_2\)): When is passed through a purple potassium permanganate solution, it turns it colourless because it is a strong .
\(2KMnO_4\) + \2H_2O\) + \(5SO_2\) → \(K_2SO_4\) + \(2MnSO_4\) + \(2H_2SO_4\)
c. Test for (\(O_2\)): We can confirm the development of oxygen (\(O_2\)) gas during a reaction by placing a burning candle near the mouth of the test tube containing the reaction mixture because oxygen promotes . The intensity of the flame increases.
d. Test for (\(H_2\)): When a burning candle is brought close to gas, it makes a pop sound.
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