List of top Chemistry Questions on Reaction mechanisms

Which of the following statements about the SN2 reaction mechanism is/are true?
Q and R in the reaction sequences are respectively:
Q and R in the reaction
The major product of the following reaction is:
major product
The compounds A and B are respectively:
compounds A and B
Ozonolysis of o-xylene produces:
Ozonolysis of o-xylene
The product ’P’ in the above reaction is:
product p
The reactivity order of the following molecules towards SN1 reaction is:
Allyl chloride (I), Chlorobenzene (II), Ethyl chloride (III)