Hoping to synthesize 3,3-dimethyl-2-butanol, an inexperienced student reacted 3,3-dimethyl-1-butene with h2so4 / h2o. what major product was the student surprised to isolate?

2,3-dimethyl-2-butanol

Explanation:

From the mechanism shown below, the addition of H^+ produces secondary carbocation which is less stable and rearranges by 1,2-alkyl shift to form a more stable tertiary carbocation which onto which the HSO3- now adds. Reaction with water gives the 2,3-dimethyl-2-butanol as the major product. The minor product is 3,3-dimethyl butanol. The alkyl shift is to relieve steric hindrance and create a more stable carbocation.

1. the question asks the most appropriate, which seems to rule out "all of the above." your choice appears to be the correct one.

2. the protocol described is good for identifying correlation, but not cause and effect. for cause/effect, you need to devise a protocol that will assign the treatment (or not) to groups that have essentially the same "demographics" with respect to all the other variables. your choice regarding control group seems appropriate. random assignment of treatment (choice d) may be appropriate also. (i think you can argue that b and d are just different descriptions of the same method.)

3. d will randomize the birds, but may not guarantee there are 10 in each group. e will do both, so seems the better choice.

comment on question 2

based on the problem statement, it seems clear that confident, attentive drivers are more likely to use daytime running lights. so, the protocol might need to be devised in such a way that the lights would be turned on or off without the driver's knowledge. (an attentive driver will figure it out.) assigning a confident, attentive driver to a group required to drive without running lights might mess with his/her confidence and attentiveness. you don't want your experiment to do that. (nor do you want the experiment to subject a driver to greater risk of accident as a consequence of driving without running lights.) experiments involving human safety are always problematic.

i just learnt this recently but i need to look through my notes again