Alkynes undergo acid catalysed addition of water across the triple bond in the presence of mercuric ion as catalyst. A mixture of HgSO_(4) and aqueous H_(2)SO_(4) is used and addition product follows Markownikoff's rule R-C-=CH+H_(2)O underset(H_(2)SO_(4)"Step 1")overset(HgSO_(4))toR-underset(OH)underset(||)(C)=CH_(2) underset("Step 2")to underset("Step 2")to R-underset("Ketone")underset(O)underset(||)(C CH_(3) Select the correct statement(s)

Alkynes undergo acid catalysed addition of water across the triple bon

1.	Alkynes undergo acid catalysed addition of water across the triple bond in the presence of mercuric ion as catalyst. A mixture of HgSO_(4) and aqueous H_(2)SO_(4) is used and addition product follows Markownikoff's rule R-C-=CH+H_(2)O underset(H_(2)SO_(4)"Step 1")overset(HgSO_(4))toR-underset(OH)underset(\|\|)(C)=CH_(2) underset("Step 2")to underset("Step 2")to R-underset("Ketone")underset(O)underset(\|\|)(C CH_(3) Select the correct statement(s)
Answer» Enol form is the hydration of alkyne is called vinyl alcohol Conversion of enol to KETONE (step 2)is called tautomerisation and enol and ketone are called tautomer Step 2 is acid catalysed `HgSO_(4)` forms vinyl cation `R-overset(OPLUS)(C)-underset(Hg^(oplus))underset(\|)(CH) "with" RC-=CH` ANSWER :A,B,C,D