11. Which one would be E isomer? a) b) Br OH 12. Which is the correct name for H
ID: 547897 • Letter: 1
Question
11. Which one would be E isomer? a) b) Br OH 12. Which is the correct name for HyC HJCH a) (E) 2-Chloro-3-methylpent-2-en-1-ol b) (Z) 2-Chloro-3-methylpent-2-en-1-ol c) (E)2-Chloro-1-hydroxy-3-methylpent-2-ene d) (Z) 2-Chloro-1-hydroxy-3-methylpent-2-ene Cl CH2OH 13. Which one is a terminal alkyne? a) 1-hexene b) 2-hexyne e) propyne d) 3-hexyne 14. Which reactant would give a trans alkene from the reaction of internal alkyne? a) Ha/Cat. Pt c) Na/liq, ammonia b) Ha/Lindlar catalyst d) LiAlH 15. Which reaction would give the alkene? a) Butyl acetylene+ HBr (1 eq.) b) Methyl acetylene+ Bra (2 eq.) c) 2,2-Dibromopentane + NaOCH (excess) d) Pent-2-yne +HCL/H20Explanation / Answer
1.) b is an E isomer bcoz the priority 1 group are on the opposite side of the double bond, which is done based on the atomic mass of the group attached to the carbon.
12.) d is the answer. Select the chain with highest number of carbon that include the functionalities. Number it so that the substituents get the least number. Its Z as the priority 1 are on the same side of the double bond.
13.) c is the answer as the number is not mentioned specifically and so its at the terminal.
14.) b is the answer as its conversion of alkyne to alkene. If we use Lindlar's catalyst only it will get restricted at alkene orelse it will go further reduction and result in alkane.
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