Question

Given the following reaction, the intermediate is:

[A]

[B]

[C]

[D]

Answer 1

Hint: To answer this, you must know that in a chemical reaction, an intermediate is species which is neither the reactant not the transition state and also not the product yet. Here, the given reaction will proceed by electrophilic addition pathway. You can use this to answer the question.

Complete answer:
We know that in organic chemistry, based upon whether the attacking group is an electrophile or a nucleophile, we can divide the reactions in two groups namely electrophilic and nucleophilic. Further, based upon their pathway and action, we divide them into two further sub-groups named addition reactions and substitution reactions.
In the given question, we can see that we have an ion as a reagent hence we can say that the reaction takes place by the electrophilic pathway. And, the reaction is an additional reaction.
Now, let us see the reaction pathway-

We can understand from the above reaction mechanism that the intermediate this formed is

Therefore, the correct answer is option[B] .

Note:
Electrophilic addition is the addition reaction where the group which is being added is an electrophile i.e. accepts a pair of electrons and nucleophilic addition is the addition reaction where the attacking group is a nucleophile i.e. it will donate a pair of electron.
Similarly, electrophilic substitution is a reaction where the leaving group is substituted by an electrophile and nucleophilic substitution is a substitution reaction where the leaving group is replaced by the nucleophile by attacking on the positively charged atom to which the leaving group is attached.