#1: the following reaction occurs in a voltaic cell: cu2+ + zn --> zn2+ + cu. which of the following reactions occurs at the anode?

a. cu2+ + zn --> zn2+ + 2e-

b. cu2+ + 2e- --> cu

c. zn --> zn2+ + 2e-

d. cu2+ + 2e- --> zn2+ + cu

In a voltaic cell there are two electrodes: anode and cathode.

On the cathode, the reaction that occurs is reduction, which means that the metal gains electrons.

On the anode the reaction is oxidation, which means that the metal loses electrons.

In this voltaic cell the reaction on the anode is:

Zn --> Zn 2+  + 2e-, i.e. option C.

option C.

2positives of biotechnology: 1. plants have become more resistant to viruses and other communicable pests.2. with the of biotechnology, we have been able to produce better tasting fruits as well as vegetables.2 negatives of biotechnology: 1. biotechnology poses a number of environmental threats. genetically modifies crops often infect monarch butterflies and other insect species.2. viruses could combine with crops.