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Q. Thiophene & its derivatives show following pharmacological activity.

Q. Identify the following heterocyclic compound.

Q. CH3CHBrCH2CHClCH3 is the generalized representation of what number of stereo isomers?

Q. What can be said with certainty if a compound has [!] D/25 = -9.25º ?

Q. Identify the reaction: When thiophene react with dimethyl formamide in the presence of POCl3, it will produce thiophene – 2 – carboxaldehyde.

Q. Of the compounds which correspond to the general name "dichlorocyclobutane", how many are optically active?

Q. Enantiomers are:

Q. How many chiral stereoisomers can be drawn for CH3CHFCHFCH(CH3)2?

Q. Which statement about thiophene is incorrect?

Q. Bromination of thiophene by using Bromine in benzene will produce________