NEET Organic Chemistry Some Basic Principles and Techniques — Set 20

Question 1

Which method is used to estimate halogens in an organic compound by heating with fuming nitric acid?

Accepted Answer

The Carius method involves heating the compound with fuming $ \ce{HNO3} $ to convert halogens to silver halides.

Question 2

Which type of isomerism is shown by $ \ce{CH3CH2CHO} $ and $ \ce{CH3COCH3} $?

Accepted Answer

$ \ce{CH3CH2CHO} $ (propanal) and $ \ce{CH3COCH3} $ (acetone) have the same molecular formula ($ \ce{C3H6O} $) but different functional groups (aldehyde vs. ketone), indicating functional isomerism.

Question 3

Which intermediate is most likely to form during homolytic cleavage of $ \ce{CH3CH2CH2CH2Br} $ under UV light?

Accepted Answer

Homolytic cleavage under UV light splits $ \ce{C-Br} $ equally, forming $ \ce{CH3CH2CH2CH2.} $ (butyl radical) and $ \ce{Br.} $, typical in radical reactions.

NEET Chemistry: Organic Chemistry Some Basic Principles and Techniques — Practice Set 20

Q1. Which method is used to estimate halogens in an organic compound by heating with fuming nitric acid?

Q2. Which type of isomerism is shown by \( \ce{CH3CH2CHO} \) and \( \ce{CH3COCH3} \)?

Q3. Which intermediate is most likely to form during homolytic cleavage of \( \ce{CH3CH2CH2CH2Br} \) under UV light?

Q4. What is the hybridization of the carbon atom in \( \ce{CH3CH2C#N} \) attached to the ethyl group?

Q5. What is the hybridization state of the carbon atom in the carbonyl group of \( \ce{CH3CHO} \)?

Q6. In Lassaigne’s test, the presence of nitrogen gives a Prussian blue color due to the formation of which compound?

Q7. Which free radical formed from \( \ce{CH3CH2CH2CH2CH3} \) via homolytic cleavage is most stable?

Q8. What is the total number of \( \pi \) bonds in \( \ce{CH3C#CCH3} \)?

Q9. An organic compound with two \( \pi \) bonds has a total of 7 sigma bonds. What is its molecular formula?

Q10. Which functional group is present in \( \ce{CH3CH2COOH} \)?