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An element A occupies group number 17 an...

An element A occupies group number 17 and period number 2, shows anomalous behaviour . A reacts with water forms a mixture of B,C and acid D. B and C are allotropes. A also reacts with hydrogen violently even in dark to given an acid D. Identify A,B,C and D write the reactions.

Text Solution

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i) The element A that occupies group number 17 and period number 2 is fluorine
ii) Fluorine reacts with water and forms a mixture of B and C
`2F_2 + 2H_2 O to 4HF + O_2`
`3F_2 + 3H_2 O to 6HF + O_3`
Therefore B is Oxygen and C is Ozone.
iii) Fluorine reacts with hydrogen to give D.
`F_2 + H_2 to 2HF`
D is hydrofluorine acid.
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