Which of the following is the rate-determining step for the monobromination of cyclohexane?

Which of the following is(are) product(s) of the reaction shown? 

Predict the major product of the following reaction.       

How many monochlorinated products can be formed when the alkane below is heated in the presence of Cl2?

Bonus question Propose an efficient multi-step synthetic sequence to accomplish the transformation below. You need to enter your answer as follows : 1. …..   2. ….   3. ….  ect. The reagent/chemical and reaction condition should be entered in sequence and proper structure. No partial credit. 

Which of the following is (are ) possible product(s) of the reaction shown? 

Which of the following are possible product(s) of the reaction shown?     

A possible reaction of ethane with chlorine is shown below.This reaction could conceivably occur by the following chain mechanisms [1], [2], and [3]. The chain initiating step(s) is (are) ________.

Which of the following sequences converts 2-methylpropene and sodium acetylide into 3-methylbutanal?

Which of the following alkenes cannot be converted into an alkyne by reacting it with bromine followed by an excess of sodium amide and then with water?