14) Consider a Galvanic cell by . comstructed from the following half cells, lin

Question

14) Consider a Galvanic cell by . comstructed from the following half cells, linked by an extermal circuit and from KC1 salt bridge. - an Al(s) electrode in 1.0 MAKNO) solution - a Pb(s) electrode in 1.0 M Pb(NOs; solution The balanced overall (net) cell reaction is A) Pb(s) + Al'"(aq) Pb2"(aq) + AMs.) D) Pb?"(aq) + Alis) Ph(s) + Al)(aq). E) Pt?-(aq) + Ap-(aq) Ptr(s) + Al(s). Answer 15) Which of the following is true concerning a galvanic cell? A) Oxidation occurs at the anode and is where anions move towards B) Oxidation occurs at the cathode and is where anions move towards C) Oxidation occurs at the anode and is where cations move towards D) Oxidation occurs at the cathode and is where cations move towards E) Reduction occurs at the anode and is where anions move towards Answer: 16) Which of the following is true conceming a galvanic cell? A) Reduction occurs at the anode and is where anions move towards B) Reduction occurs at the cathode and is where anions move towards C) Reduction occurs at the cathode and is where cations move towards D) Oxidation occurs at the anode and is where cations move towards E) Oxidation occurs at the cathode and is where cations move towards Answer: ( 17) Consider an electrochemical cell constructed from the following half cells, linked by a KCI salt bridge -a Fe electrode in 1.0 M FeClz solution - a Sn electrode in 1.0 M Sn(NOs): solution When the cell is running s A) The tin electrode loses mass and the tin electrode is the cathode B) The tin electrode gains mass and the tin electrode is the cathode C) The iron electrode gains mass and the iron electrode is the anode. D) The iron electrode loses mass and the iron electrode is the cathode. E) The iron electrode gains mass and the iron electrode is the cathode. ice includes only true statements and no false ones? Answer. ( 18) Which one of the following reactions will occur spontaneously at standard-state conditions and 25°C? A) Mg2+ + Ca Mg + Ca2+ D) Cu +2H+ Cu2+ + H2 Answer: ( /JdoA.Mo@

Explanation / Answer

Answer for 14

(c)

Pb acts as anode and Al acts as cathode. so (c) is balanced as well as correct quation.

Answer for 15

(A)

As in oxidation, electron is taken by anode and oxidise anions..so anion moves toward anode.

Answer for 16

(c)

As in reduction, electron is given by cathode, so anion gets reduced, and it moves towards cathode.

Answer for 17

(c)

As Sn acts as cathode and Fe acts as anode, anode accepts electron from the anion and gains it mass.

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