Which substance in this redox reaction is the oxidizing agent Cu+2AgNo3 = 2Ag + Cu(NO3)2
A. N
B. AgNO3
C. Cu
D. NO3-
E. Cu(NO3)2

B. AgNO₃ is the oxidizing agent

Oxidation is an increase/increase in oxidation number, while reduction is a decrease/decrease in oxidation number.

In the redox reaction, it is also known

Reducing agents are substances that experience oxidation

The oxidizer is a substance that is reduced

Reaction

Cu+2AgNO₃ ⇔ 2Ag + Cu(NO₃)₂

Oxidizing reaction :

Cu⇒Cu²⁺+2e⁻ (oxidation number from 0 to +2)

Reducing reaction

2Ag⁺+2e⁻⇒Ag (oxidation number from +1 to 0)

the oxidizing agent ⇒a substance that is reduced , so that is AgNO₃