Introduction to Organic Chemistry: Hydrocarb is the IUPAC name of CH,-CHCH? (12.

Question

Introduction to Organic Chemistry: Hydrocarb is the IUPAC name of CH,-CHCH? (12.5) A. methylacetylene D. 4-butyne B. propyne E. 1-butyne C. propylene 37. The cis isomer of 2-butene is (12.6) A. H2C-CH-CH2 CH B. CH,-CH=CH-CH, CH3 CH3 CH3 CH3 CH3 CH3 E. CH-CH 2in 38. The name of this compound is (12.6) /owt longed Cham Cl C-C Cl A. dichloroethene C. trans-1,2-dichloroethene E. trans-chloroethene B. cis-1,2-dichloroethene D. cis-chloroethene 39. Hydrogenation of CH CH CH2 gives (12.7) B. CH,-CHCH3 D. no reaction A. 3CO2 + 6H2 C. HC CH- CH E. CH3-CH2-CH,-CH3 40 Choose the product of the following reaction: CH3-CH=CH2 + HO (127) C. CH3-CH2 B. no reaction A. CH,CH,-CH,-OH D. CH3-CH-CH2 OH A. CH,-CH2-CH,-CH3 OH E. CHe-CH-CH3 41. Hydration of 2-butene gives (12.7) OH OH D. E. C CH3-CH-CH2-CH3

Explanation / Answer

36) The IUPAC name is: 1-butyne. option E is correct

Explanation: The number of carbon atoms in the longest carbon chain are 4 so the rootword is but-. A triple bond is located at 1st position so the name is 1-butyne.

37) option D is the cis-isomer of 2-butene

Explanation: The large groups are located on same side of the double bond so it is called cis.

38) The name is: trans-1,2-dichloroethene

Explanation: The number of carbon atoms in the longest carbon chain are 2 so the rootword is eth-. Two -Cl groups are located at 1,2-positions so the name is trans-1,2-dichloroethene

39) option B is correct

Explanation: Alkenes on hydrogenation produces alkane as product.

40) option E is correct

Explanation: addition of H2O to alkene in presence of acid catalyst produces alcohol as product.

41) option C is correct

Explanation: Addition of H2O to alkene produces more substituted alcohol as product.

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