When o-bromoanisole is treated with `NaNH_(2)//liq. NH_(3)` , the main product obtained is

When C_(6)D_(5)Br reacts with NaNH_(2)//liq. NH_(3) , the product obtained is

Treatment of with NaNH_(2)//liq.NH_(3) gives

When Pb_(3)O_(4) is treated with conc. HNO_(3) , the insoluble product obtained is

Methyl alcohol is treated with conc.HI and red P. The main product obtained is

When CH_(3)CH_(2)CHCl_(2) is treated with NaNH_(2) , the product formed is :

When 1- alkyne is treated with Na + Liq. NH_(3) and product is reacted with methyl chloride, the end product of the reaction will be