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Question

# The equation, α=D−d(n−1)d is correctly matched for:

A
AnB/2+nC/3
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B
AnB/3+(2n/3)C
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C
A(n/2)B+(n/4)C
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D
A(n/2)B+C
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Solution

## The correct option is A A⇌nB/3+(2n/3)Cα=(D−d)(n−1)d→(1)α=Degree of dissociationd=Vapor densityn= no of moles of gaseous product for 1 mole of reactant Any equation in which the total number of moles on product side =n and on reactant side =1.A) A⇌nB/2+nC/3 here at reactant side n=1 But product side n=n2+n3=5n6≠nB)A⇌nB/3+(2n/3)C here at reactant side n=1 product side n=n2+2n3=6n6=nC)A→(n/2)B+(n/4)C here at reactant side n=1 But product side n=n2+n=2n4≠nD)A⇌(n/2)B+C here at reactant side n=1 But product side n=n2+1=n+12≠nHence the correct answer is option B.

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