Chopra put City 1 up as early as the 4th minute. The game then went another 75 mins before Chops stole in to round the Argyle keeper to poke home his and City's second.
5 mins from time and Chris Burke was upended and Chopra scored past the static Larrieu to make it 3 - 0.
Chopra and City are now the leading scorers in the Champonship.
Capaldi's red card was a blow but did not take the shine off a fine win and sets up a cracking tie this Sunday.
Cardiff City v Bristol City.
Ko 1:15pm.
Live on Sky Sports.
