Which of the following is a correct electron displacement for a nucleophilic reaction to take place? 

Given,


Which of the given compounds can exhibit tautomerism?

• I and II

• I and III

• II and III

• II and III

43.

Given,


The enthalpy of hydrogenation of these compounds will be in the order as

• I>II>III

• I<II<III

• II>III>I

• II>III>I

Biodegradable polymer which can be produced from glycine and aminocapric acid is

• nylon 2-nylon 6

• PHBV

• buna -N

• buna -N

An organic compound X having molecular formula C₅H₁₀O yields phenyl hydrazone and gives negative response to the iodoform test and tollen test. It produces n -pentane on reduction X could be

• pentanal

• 2-pentanone

• 3-pentanone

• 3-pentanone