For the cell reaction to be spontaneous the EMF of the cell should be:

negative
positive
zero
some times positive and some times negative

Question

For the cell reaction to be spontaneous the EMF of the cell should be-negativepositivezerosome times positive and some times negative

Toppr Admin · Accepted Answer

If EMF of cell is positive- then the -x394- G of the overall reaction is less than zero-x394-G-x2212-nFEcell-x2234- If Ecell is positive- then reaction is spontaneousHence- option B is correct-

For the cell reaction to be spontaneous the EMF of the cell should be:negativepositivezerosome times positive and some times negative

If EMF of cell is positive, then the Δ G of the overall reaction is less than zero.ΔG=−nFEcell∴ If Ecell is positive, then reaction is spontaneousHence, option B is correct.

For the cell reaction to be spontaneous the EMF of the cell should be:

negative
positive
zero
some times positive and some times negative

If EMF of cell is positive, then the $Δ$ G of the overall reaction is less than zero.
$Δ G = - n F E_{c e l l}$
$∴$ If $E_{c e l l}$ is positive, then reaction is spontaneous
Hence, option B is correct.