An unknown compound A has a molecular formula \[{{C}_{4}}{{H}_{6}}.\] When A is treated with an excess of \[B{{r}_{2}}\] a new substance B with formula \[{{C}_{4}}{{H}_{6}}B{{r}_{4}}\] is formed. A forms a white precipitate with ammoniacal silver nitrate solution. A may be [MP PET/PMT 1998]

An unknown compound A has a molecular formula \[{{C}_{4}}{{H}_{6}}.\]

1.	An unknown compound A has a molecular formula \[{{C}_{4}}{{H}_{6}}.\] When A is treated with an excess of \[B{{r}_{2}}\] a new substance B with formula \[{{C}_{4}}{{H}_{6}}B{{r}_{4}}\] is formed. A forms a white precipitate with ammoniacal silver nitrate solution. A may be [MP PET/PMT 1998]
A.	Butyne-1
B.	Butyne-2
C.	Butene-1
D.	Butene-2
Answer» B. Butyne-2