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Question
Chemistry
Assertion: F-F bond in F 2 molecule is strong. Reason: F atom is small in size.
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Q.
Assertion
: $F-F$ bond in $F _{2}$ molecule is strong.
Reason
: $F$ atom is small in size.
AIIMS
AIIMS 2007
A
If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
B
If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C
If Assertion is true but Reason is false.
D
If both Assertion and Reason are false.
Solution:
$F - F$ bond in $F _{2}$ is weaker than $Cl - Cl$ bond in $Cl _{2}$ due to the lower bond energy of $F _{2}$, despite shorter bond length is due to repulsion between lone pairs on two $F$ atoms.