Which one of the Grignard reactions below could give rise to CH3CH3CH(OH)CH2CH3?
Correct answer: C. Propanaldehyde and ethyl Grignard
- A. Propane and methyl Grignard
- B. Methyl ethyl ketone and methyl
- C. Propanaldehyde and ethyl Grignard
- D. None of these
Explanation
The addition of Grignard reagent to aldehydes leads to the production of secondary alcohol, and the addition of ketone leads to the production of tertiary alcohol. As the alcohol produced in the question is secondary, the correct option would be the one with the reaction of aldehyde with grignard reagent, hence option C.Option A is incorrect as alkanes do not directly react with grignard to form alcohol; grignard reacts with alcohol to produce alkane.Option B is incorrect, as with ketone, a tertiary alcohol is formed, which is not the case in the question.
This question appeared on the ETEA MDCAT 2006 paper, which you can sit online with every answer explained.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Alcohols
Alcohols contain a hydroxyl group attached to a saturated carbon atom and are classified as primary, secondary or tertiary. Their nomenclature, hydrogen bonding, acidity, oxidation, dehydration, reaction with sodium and conversion to haloalkanes are covered, along with the distinction between alcohols and phenols, where the hydroxyl group is attached directly to an aromatic ring.
Practise Alcohols and Phenols
535 free Alcohols and Phenols MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Alcohols questions
Alcohol reacts slowly with Na metal compared to water because it has low concentration of H+ ion which suggests that it is:
Which one of the following is the proper classification of the following is the proper classification of formula given below?
To produce absolute alcohol (100%) from rectified spirit (95.6% alcohol), the remaining 4.4% water must be removed by a drying agent such as
When ethanol is treated with fehling's solution. It gives a precipitate of:
CH3CH2l reacts with dry Ag2O to give
Which compound has the highest boiling point?