NCERT Class XII Chemistry
Chapter - The p-Block Elements
Questions with Solutions
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Question : 28
Total: 74
Write the reactions of F 2 C l 2
Solution:
Fluorine reacts vigorously with water and oxidises water tooxygen.
2 H 2 O + 2 F 2 → 4 H F + O 2
Chlorine dissolves in water to form chlorine water. It slowly reacts withthe water to form a mixture of hydrochloric acid and hypochlorous acid.
H 2 O + C l 2 → H C l + H O C l
Hypochlorous acid is very unstable. In presence of sunlight, it decomposesto give HCl and nascent oxygen.
H O C l
H C l + O
This oxygen is responsible for oxidising and bleaching properties ofchlorine.
Chlorine dissolves in water to form chlorine water. It slowly reacts withthe water to form a mixture of hydrochloric acid and hypochlorous acid.
Hypochlorous acid is very unstable. In presence of sunlight, it decomposesto give HCl and nascent oxygen.
This oxygen is responsible for oxidising and bleaching properties ofchlorine.
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