Question

Question Completion Status: QUESTION 23 Which of the following statements is true of aldehydes and ketones? a. Both aldehydes and ketones are easily oxidized. b. Neither aldehydes nor ketones are easily oxidized. c. Aldehydes are easily oxidized, but ketones cannot be readily oxidized. Od. Ketones are easily oxidized, but aldehydes cannot be readily oxidized QUESTION 24 Which of the following compounds has the lowest boiling point? O a. acetone b. formaldehyde O c 3-octanone d. cyclopentanone QUESTION 25 Anster the following question based on the given ball-and-stick model. Atoms other than carbon and hydrogen are labeled with the symbol of the element What will the product be if the given compound reacts with AgNO3 in the presence of NH3 a propanal b. l-propanol opropanoate con od none of these

Answer 1

23.answer is option c. Due to the presence of particular H atom present in aldehyde, they can be easily oxidised. Ketone do not have that purticular H atom hence they are resistant to oxidation. Only strong oxidizing agents like KMNO4 solution can oxidise ketones.

24. Among aldehydes and ketones, aldehydes boil fast. It is because the presence of 2 electron donating alkyl groups around keto group make them more polar. As polarity increases dipole moment increases and hence boiling point. In the given options only option b is an aldehyde. All the remaining are ketones. So answer is b

25. The given compound is ketone. Ketone won't react with Tollens reagent. Hence option d