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

The correct answer is Option B.

Explanation:

Oxidizing agent is the agent which oxidizes the other substance and itself gets reduced. It undergoes reduction reaction in which, it gains electrons and also the oxidation state of the substance gets reduced.

Reducing agent is the agent which reduces the other substance and itself gets oxidized. It undergoes oxidation reaction in which, it looses electrons and the oxidation state of the substance is increased.

For the given chemical equation:

Half reactions for the given chemical reaction:

Copper is loosing 2 electrons, thus it is undergoing oxidation reaction and is considered as a reducing agent.

Silver ion is gaining 1 electron per atom, thus it is undergoing reduction reaction and is considered as an oxidizing agent.

Hence, is considered as an oxidizing agent and therefore the correct answer is Option B.

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.