Hich species in each pair is a better oxidizing agent under standard-state conditions? a. br2 or au3+ b. h2 or ag+ c. cd2+ or cr3+ d. o2 in acidic media or o2 in basic media

Explanation:

It is known that species with higher value of reduction potential will act as a good oxidizing agent.

(a) Here we are given and . Reduction potential of is 1.07 V and reduction potential of is 1.50 V.

As has higher value of reduction potential. Hence, acts as a better oxidizing agent than .

(b)  Here we are given and . Reduction potential of is 0.00 V and reduction potential of is 0.80 V.

As has higher value of reduction potential. Hence, acts as a better oxidizing agent than .

(c)  Here we are given and . Reduction potential of is -0.40 V and reduction potential of is -0.74 V.

As   has higher value of reduction potential than . Hence, acts as a better oxidizing agent.

(d)  The given species are in acidic medium and in basic medium. Reduction potential of in acidic medium is 1.23 V and reduction potential of   in basic medium is 0.40 V.

Thus, we can conclude that in acidic medium is better oxidizing agent that in basic medium.

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

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