List of top Chemistry Questions on Reaction mechanisms asked in WBJEE

Rank the following anions in order of decreasing nucleophilicity in a polar protic solvent (most $\rightarrow$ least nucleophilic).

An egg takes 4.0 minutes to boil at sea level where boiling point of water is $T_1$ K, whereas it takes 8.0 minutes to boil on a mountain top where boiling point of water is $T_2$ K. The activation energy for the reaction that takes place during boiling of egg is
The reactivity order of the following molecules towards SN1 reaction is:
Allyl chloride (I), Chlorobenzene (II), Ethyl chloride (III)
The product ’P’ in the above reaction is:
product p
Ozonolysis of o-xylene produces:
Ozonolysis of o-xylene
The compounds A and B are respectively:
compounds A and B
The major product of the following reaction is:
major product
Q and R in the reaction sequences are respectively:
Q and R in the reaction
Which of the following statements about the SN2 reaction mechanism is/are true?