One mole of 1,2-dibromopropane on treatment with X moles of `NaNH_(2)` followed by treatment with ethyl bromide gave a pentyne. The value of X is:

One mole of 1,2-dibromopropane on treatment with X moles off NaNH_(2) followed by treatment with ethyl bromide gave a 2-pentyne. The value of X is

1, 2-Dibromo propane on treatment with X moles of NaNH_(2) followed by treatment with ethyl bromide gives a pentyne. The value of X is :

1,2-dibromopropane on treatment with X mole of NaNH_2 followed by treatment with ethyl bromide gave a pentyne the value of X is:

One mole of "1,2" -dibromobutane on treatment with "X" moles of NaNH_(2) followed by treatment with ethyl bromide gave a hexyne.The value of "X" is:

One mole of 4 - nitrocatechol (4 -nitro - 1, 2 - dihydroxybenene) on treatment with an excess of NaH followed by one mole of methyl iodide and H_(2)O respectively gives

1,2-dibromopropane is heated with one mole of alcoholic KOH. The reaction is expected to produce