Shortcut Methods
JEE Mains and Advanced Numericlas on Nitrogen Containing Organic Compounds
1. An organic compound having a molecular formula C8H11N when reacts with nitrous acid to give pure isobutyl alcohol. Then the molecular formula of an organic compound is:
a) C8H11NO b) C8H11NO2 c) (C8H11NO)2 d) C8H11NO3
Answer: a) C8H11NO
Explanation: It is a primary amine. So, its molecular formula will be C8H11NH2 on reaction with HONO, it’s converting into Alcohol
2. Identify the major product P obtained in the following reaction: RCONH2 + H2O ====> P If boiling in KOH then what will be a major product Q??
Answer: In the above reaction, the major product obtained will be RNH2, and when RNH2 boils with KOH, the major product will be RNC, also known as Isocyanide.
3. Which of the following compounds will react faster by the SN2 mechanism with CH3ONa in methanol? A) CH3Br B) (CH3)2 CHBr C) (CH3)3 CBr D) (CH3)4 C+Br-
Answer: A) CH3Br
Explanation: The correct answer is A) CH3Br. In an SN2 reaction, the rate of the reaction depends on the steric hindrance around the carbon atom undergoing substitution. In this case, CH3Br has no steric hindrance around the carbon atom, whereas the other compounds have increasing steric hindrance.
