Spontaneous Reaction

Which of the following reaction is spontaneous oxidation - reduction reaction

Which of the following is always true regarding the spontaneity of reaction occuring in a galvanic cell?

Which statements is true about a spontaneous cell reaction in galvanic cell?

A particular reaction at 27^(@)C for which DeltaH gt 0 and DeltaS gt 0 is found to be non-spontaneous. The reaction may proceed spontaneously if

If a cell reaction is spontaneous, then :