Howmany of the following alkynes on treatment with dilute H_2SO_4 in presence of Hg SO_4 give a methyl ketone ? HC -= CH, CH_3C -= CH, CH_3CH_2 C -= CH, CH_3C -= C CH_3 , C_6H_5C -= CH, C_6H_5C -= C CH_3. CH_3CH_2C -= C CH_2CH_3, CH_3CH_2CH_2C -= CH, C_6H_5CH(OH)C-=CH

Howmany of the following alkynes on treatment with dilute H_2SO_4 in p

1.	Howmany of the following alkynes on treatment with dilute H_2SO_4 in presence of Hg SO_4 give a methyl ketone ? HC -= CH, CH_3C -= CH, CH_3CH_2 C -= CH, CH_3C -= C CH_3 , C_6H_5C -= CH, C_6H_5C -= C CH_3. CH_3CH_2C -= C CH_2CH_3, CH_3CH_2CH_2C -= CH, C_6H_5CH(OH)C-=CH
Answer» Solution :These are `CH_3 C -= CH , CH_3CH_2C -= CH , CH_3 C -= C CH_3, C_6H_5C -=CH , and CH_3 Ch_2 CH_2C -= CH . ` PLEASE note that `C_6H_5 CH (OH)C -=CH` gives `C_6H_5CH = CH - CHO and C_6H_5C-= C CH_3` gives `C_6H_5COCH_2CH_3 `