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Question

A certain halogen X2 on reaction with cold dilute alkali forms a compound in which the oxidation number of oxygen is +2. What is X2?
  1. F2
  2. Br2
  3. I2
  4. Cl2

A
I2
B
F2
C
Br2
D
Cl2
Solution
Verified by Toppr

F2 is more electronegative than oxygen. Hence, only with fluorine, oxygen can be in +2 oxidation state.
X2 is F2.
The reaction of fluorine with cold and dilute alkali can be given as follow:
2F2+2NaOHOF2+2NaF+H2O

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A certain halogen X2 on reaction with cold dilute alkali forms a compound in which the oxidation number of oxygen is +2. What is X2?
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Q2
Consider the following orders –
(1) F2>Cl2>Br2>I2: boiling point
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(4) F2>Cl2>Br2>I2: BDE
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(6) F2>Cl2>Br2>I2: Reactivity
(7) HOCl>HClO2>HClO3>HClO4: Acidic nature
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