Neet Solved Paper 2015 Question 44
Question: An organic compound X having molecular formula $ C _5H _{10}O $ yields phenyl hydrazone and gives negative response to the iodoform test and Tollen’s test. It produces n-pentane on reduction. X could be
Options:
A) pentanal
B) 2-pentanone
C) 3-pentanone
D) n-amyl alcohol
Show Answer
Answer:
Correct Answer: C
Solution:
Since, the compound X yields phenyl hydrazone and gives negative response to the iodoform test and Tollen’s test,
it must contain a $ C=O $ group but is neither a methyl ketone nor an aldehyde.
The structure of X could be $ \underset{3-pentanone}{\mathop{CH _3-CH _2-\overset{\overset{O}{\mathop{||}},}{\mathop{C}},-CH _2-CH _3}}, $ having molecular formula $ C _5H _{10}O. $
