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NEET Chemistry Solved Question Paper 2015

Multiple Choice Questions

41.
Which of the following is a correct electron displacement for a nucleophilic reaction to take place?

Allylic and benzylic halides show high reactivity towards Sn1 reaction Further, due to greater stabilisation of allyl and benzyl carbocations intermediates by resonance, primary allylic and primary benzylic halides show higher reactivity in Sn1 reactions than other simple primary halides.

Hence, it undergoes nucleophilic reaction readily.

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42.

Given,

Which of the given compounds can exhibit tautomerism?

I and II
I and III
II and III
II and III

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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

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44.

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

nylon 2-nylon 6
PHBV
buna -N
buna -N

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45.

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