Answer:
The answers are options b , c and d.
Hope this helps.
Not sure about the last one, but I think the percent composition of zinc would be ~ 42.8232
Zn⁰ ----> Zn⁺² + 2e⁻ - oxidation
Hg⁺² + 2e⁻ ----> Hg⁰ - reduction
Zn loses 2 moles of electrons , and Hg gains 2 mole of electrons.
So, number of moles of electrons gained and lost during reaction is equal.
If I’m right this should be the answer
Below Mechanism shows the mechanism of formation of diazonium ion. Aniline is treated with
Nitrosonium ion which is generated
in situ by the reaction of Sodium nitrile and strong acid. The resulting <span>
benzenediazonium ion on reaction with CuBr yields
Bromobenzene and on treatment with CuCN gives
Benzonitrile. Mechanism is as folow,</span>