Match the following questions

Answer

A, B, C, D

Explanation

A) Non spontaneous reaction `NaCl to Na^(+) + Cl^(-) , 2Cl^(-) to Cl_2 + 2e^(-)("anode")`
` 2H_2O + 2e^(-) to 2OH^(-) + H_2 ("cathode") , Na^(+) + OH^(-) to NaOH`
`Na^(+)` ions travel to the cathode but cannot undergo reduction [spontaneous means in it.s own direction (Irreversible) ]
`Pb_((s)) + PbO_(2(s)) + 2H_2SO_4 underset("charging")overset("wetering") iff 2PbSO_(4(s)) + 2H_2O`
B) spontaniou redox reaction (r) Dry cell (p) secondary voltaic cell all Irreversible process are spontaneous. It is sufficient condition but not necessary condition
C) In conducitivity cell NO chemical reaction occur by using this cel we calculate conductance and resistance
`K=("cell constant")/(R) = (l//a)/(R) , K=C xx (l)/(a)`
D) Reaction can be reversed in secondary cell
`Pb_((s)) + PbO_(2(s)) + 2H_2SO_(4(aq)) underset("charging")overset("working") iff 2PbSO_(4(s)) + 2H_2O_((l))`
cells wiht +ve cell potential are spontaneous since the `DeltaG ` is -ve forsuch cells K of redox reactions are high
`DeltaG =DeltaG^(0) + RTLnk - DeltaG = nFE and E_("cell") =E_("cell")^(0) - (RT)/(nF) ln K - DeltaG^(0) = nFE_("cell")^(0)`