The alcohol (ch3)cch(oh)ch2ch2ch(ch3)2. what is the longest carbon chain 10 9 8 7

The formula given in the problem is the condensed form. Although I think there is a missing term there to make it logical. Each carbon atom can bond to 4 atoms. So, if once atom has C only, it means that it is occupied by 4 subfunctions only. So, the condensed form should be: (ch3)3cch(oh)ch2ch2ch(ch3)2. The structural formula is shown in the picture. The longest chain contains 7 carbon atoms.

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na