2,3-Dibromobutene`overset(Reag ent)to`but-2-yne Identify the reagent.

2B+N_(2)overset(Delta)to A Identify A

CH_3CHBrCH_2Brunderset(on e equival ent)overset(alc. KOH)toP identify the main product.

C_8H_8O + CH_3CH_2MgBr to (A) overset(Lucas reag ent)to(B) Instant turbidity . Identify product B.

Assertion : Buta-1, 3-diene and but-1-yne can be distinguished with Tollen's reagent. Reason : But-1-yne gives ppt. with Tollen's reagent but buta-1, 3-cliene does not.

R-CH_(2)-C Cl_(2)-R overset(Reag ent)rarrR-C-=C-R The reagent is

Identify the wrong statement : The reagent which converts But-1-yne to But-2-yne is ale. KOH, The reagent which converts But-2-yne to But-1-yne is NaNH_2 , Catalyst used in the dimerisation of acetylene in the preparation of chloroprene in aq. NH_4 CI containing CuCI_2 , When 2, 3-Dibromobutane is treated with ale.KOH the product formed is Buta-1, 3-diene

R-CH_(2)-C Cl_(2)-R overset(Reag ent)rarrR-C-=C-R The reagent used is