some examples.
A: The compounds which are formed between 2 different halogens are called inter
halogen compounds.
The general formula of these compounds is AXn where n = 1, 3, 5 or 7.
A is larger halogen, X is smaller halogen.
Oxidation state of X is always -1, but A could be +1, +3, +5 or +7.
AX type interhalogens : ClF, BrF, BrCl, ICl
AX3 type interhalogens : ClF3, BrF3, ICl3
AX5 type interhalogens : BrF5, IF5
AX7 type interhalogens : IF7.
Q. Though electron gain enthalpy of F2 is less negative than Cl2, F2 is stronger oxidising
agent than Cl2. Why?
A: Due to high hydration enthalpy of F− (515 K.J./ mole).
Low enthalpy of dissociation of F − F bond (158.8 K.J./ mole).
Q. Name 2 poisonous gases which can be prepared from Cl2 gas.
A: Tear gas (CCl3NO2)
Phosgene (COCl2)
Q. What happens when Cl2 reacts with dry slaked lime?
A: Bleaching powder CaOCl2 (calcium chloro hypo chlorite) is formed when Cl2
reacts with Ca(OH)2.
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