Which is a polar aprotic solvent? D. HOCH2CH2CH2CH3 E. None of the choices are c

Question

Which is a polar aprotic solvent? D. HOCH2CH2CH2CH3 E. None of the choices are correct A) D B) E C) A D) B E) C 16. How are the molecules in the following pair related? A) They are unrelated molecules. B) They are resonance structures. C) They are constitutional isomers. 17. Select the list that places the substituents from the highest priority to the lowest priority. A) -CH2Br;-Br;-Cl;-CH3 H) -CH2CH3; -CH3; -CH2OH; -H C) -OCH3; -OH; -CH3; -H D) -CH2CH2I; -HC=CH2; -CH3; -H The main reason that alkyl halides are good electrophiles is that: A) the carbon halogen bond is very strong, B) the carbon atom linked to the halogen is positively polarized. C) the carbon atom linked to the halogen is electronegative. D) the halogen linked to the carbon is a good electron donor. E) the carbon atom linked to the halogen is negatively polarized.

Explanation / Answer

there are four questions...

15) the option B is the polar aprotic solvent

its N,N-dimethly formamide (DMF)

16) they are unrelated molecules because they do not have same formula , they have different no

of hydrogen and hence degree of unsaturation is different

17) The priority according to CIP rules will be

Option C ,

The group with higher atomic no is senior

18) option B is the best explanation

The halogen atoms being electronegative makes the carbon positively polarised

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