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Model Paper 9 — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryModel Paper 95 Marks
Question
1. Give condensed and bond line structural formulas and identify the functional groups present, if any, for:
a. 2, 2, 4-Trimethylpentane
b. 2-Hydroxy-1, 2, 3-propanetricarboxylic acid
c. Hexanedial?
2. Give three points of differences between inductive effect and resonance effect.
✓

Answer

1.
Image
2.
S.No.Inductive effectResonance effect
1.It involves displacement of σ electrons in saturated compounds.It involves displacement of $\pi$ electrons or lone pair of electrons in unsaturated and conjugated compounds.
2.Inductive effect can move only upto 3 to 4 carbons.In this case, movement of electrons all along the length of conjugated system takes place.
3.In inductive effect, there is slight displacement of $\sigma$ electrons and partial +ve or-ve charge develops.In this effect, there is complete transfer of $\pi$ electrons and as a result, complete +ve or -ve charge develops.

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