which of the following terms can be used to describe an electochemicl cell in wh

Question

which of the following terms can be used to describe an electochemicl cell in which a spontanecous chemical reactions genrates an electric current 2) which cell invoves a nonspontares redox reactions A) concentration cell B) electrolytic cell C) fuel cell D) galvanic cell 3) For a galv ante cell, the cathode has a sign and is the site of A) negative, oxidation B) negative, reduction C) positive, oxidation D) positive, reduction 4) A salt bridge is used to A) provide reactants in a fuel cell B) determine the direction of the cell reaction C) control whether the cell is electrolytic or galvanic. D) allow the ion flow necessary for cell neutrality 5) The chemical system shown below is at equilibrium Which change in conditions will not result in a spontaneous forward reactions 6) The reaction A(g) - B(g) is spontaneous under standard conditions Which of the following statements must be true I. The reaction is nonspontaneous under standard conditions. II. A(g) will be completely converted to if sufficient time is allowed. III. A(g) will be completely converted to B(g) rapidly. A) none of these B)1 C) I and II D) 1,11. and 111 7) Which of the following processes are spontaneous? I. dissolving more solute in an unsaturated solution II. dissolving more solute in a saturated solution III. dissolving more solute in a supersaturated solution A) none of these B)I Qlndll D) 1, II, and 111

Explanation / Answer

1) Ans: D

2) Ans: B. A nonspontaneous redox reaction occurs when an external voltage is applied to initiate the chemical reaction. As a result electricity is generated.

3) Ans: d

4) Ans: D

5) Ans: B

6) Ans: II

7) Ans: I. Delta G is lessthan zero (negative value). Hence dissolving of more solute is spontaneous.

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