Huddersfield recorded a vital 2-0 win over QPR to move six points clear of the Sky Bet Championship relegation places.
For QPR, this was a third straight league loss and they now sit just three points above the Terriers.
Huddersfield started brightly and their high-press tactics almost paid off inside the first minute. Lewis O'Brien capitalised on Todd Kane's loose pass out from defence, but the Town man could only blaze a shot wide.
Town full-back Harry Toffolo then blazed an effort high and wide over the visitors' bar after Mounie picked him out.
Eze was enjoying plenty of the ball and after some silky glimpses of skill, he cut inside and unleashed a shot which Jonas Lossl, making his first appearance since rejoining Town on loan from Everton, did well to parry away.
QPR were dominating large patches of the first half and after a fine, flowing move Luke Amos then saw a vicious shot tipped over by Lossl.
From the resulting corner Rangers' skipper Grant Hall created the clearest goalscoring chance of the half but could only place his header against a post as the visitors upped the ante.
Town's Richard Stearman tried his luck just after the restart with an acrobatic effort following Mounie's knock-down but Kelly got right behind the effort.
Town had started with much more vigour after the restart and they were rewarded just before the hour mark when they scored the opening goal.
Bacuna wriggled away from his man and fed Toffolo down the left, whose cross hung in the air and allowed Kachunga to head home from just a couple of yards out.
And it got even better for the hosts just four minutes later when they doubled their advantage via a Mounie penalty.
It came gift-wrapped from QPR after goalkeeper Kelly cheaply gave the ball away to Emile Smith-Rowe, who ventured forward and fed Kachunga.
The forward was then clumsily tripped up by Lee Wallace in the box and Mounie did the necessary from the resulting spot-kick.
The hosts were well on top from there on in and Kachunga arguably should have made it 3-0 but squandered a chance from a yard out, whilst substitute Andy King also came close to finding the scoresheet in the closing stages.