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How many moles of HI are needed to reduc...

How many moles of `HI` are needed to reduce one mole of carboxlic acid `(RCOOH)`into the corresponding alkane `(RH)`?

A

Two

B

Six

C

Four

D

Three

Text Solution

Verified by Experts

The correct Answer is:
B
`RCOOH+6HIunderset(Delta)overset(Red P)rarrRCH_(3)+2H_(2)O+3I_(2)`
Note that each `O` atom is expelled as `H_(2)O`. Thus, to remove two `O` atoms, we need `4H` atoms (i.e., `4 mol of HI`). Further, two `H` atoms are added to make it `RCH_(3)` ( two moles of `HI`). This makes a total of six moles of `HI`.
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