In a reaction, `4` mole of electrons are transferred to `1` mole of `HNO_(3)`, the possible product obtained due to reduction is:

In a reaction, 4 moles of electrons are transferred to one mole of HNO_3 when acted as an oxidant. The possible reduction product is

How many moles of electrons are required for reduction of 2 moles of Zn^(2+) to Zn ?

What is the ratio of molecules in 1 mole of NH_3 and 1 mole of HNO_3 ?