16. Which is the structure fon trans-1-sopropy-3-methyicydohexand b) II c) II d)

Question

16. Which is the structure fon trans-1-sopropy-3-methyicydohexand b) II c) II d) IV 17. What is the IUPAC name for the following cycloalkane? a) 2,4-dimethyl-1-ethylcyclopentane b) 1,3-dimethyl-5-ethylcyclopentane c) 1-ethyl-2,4-dimethylcyclopentane d) 1-ethyl-3,5-dimethylcyclopentane e) none of the above are correct 18. What is the term for the process of forming ethene (an unsaturate ethane (a saturated hydrocarbon)? a) combustion b) fractional distillation c) thermal cracking d) catalytic reformation 19. What is theIUPAC name for the following structure? a) cyclohex-3-enol b) cyclohex-4-en-1-ol c) cyclohex-1-en-4-l

Explanation / Answer

16) option A

only in sturcture methyl and isopropyl are trans to each other and the bulky isopropyl is in the axial position.

17) option C

following alphabetical order and giving numbering preferenc eto ethyl we get 1-ethyl -2,4 dimethylcyclopropane as the nae.

18)option C

Thermal cracking is the process of breaking alkanes into alkenes by heat.

19)option A

OH gets preferenc eover double bond, thus Oh bearing carbon is given number 1 and double bond is between 3 and 4 carbons.

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