12) Which of the above solutions could be used to remove lead from lead (II) nitrate?
a. Cu
b. Hg
c. Ag
d. Ni

Ag can be used to remove lead from lead (II) nitrate.

Option C

Explanation:

In order to separate the lead from lead (II) nitrate, we have to react it with another solution having same oxidation state and which can replace lead and make it as a precipitate.

So among the given options, Ag has high tendency to react with nitrate easily. Since, the oxidation state of Ag is also similar to the oxidation state of Pb, it can easily substitute Pb. Thus, Ag can be used to remove lead from lead nitrate.

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

they vary. it used to be meat, grain, bread, candy, beverages, donuts, and fruits/vegetables. now they added exercise in.