Questions

Here the most stable carbocation is the option (2).

Carbocations are always hungry for electrons. The stability of carbocations increases from primary to secondary to tertiary. Here, option (c) shows the most stable carbocation because it can easily withdraw electrons from two other carbon atoms and the more electronegative oxygen atom.

Carbocation stability depends on hyperconjugation. The tertiary carbocation is stabilized by electron releasing inductive effect.

The Secondary Structure of a Protein is option B)

The Secondary Structure of a Protein results from Hydrogen Bonds.

The key to this math riddle is realizing that the one place must be zero.
888 +88 +8 +8 +8 =1,000

 Augustus Caesar

Here in the given options, Diamond is an element as it is the allotrope of the carbon atom.

Copper Iodide is the systematic name of the given compound (CuI)s.