What spell did Dumbledore use against Voldemort in the Order of the Phoenix?

Expelliarmus
Dumbledore fighting Voldemort in the Atrium of the Ministry of Magic Voldemort taunts him with impending death and attacks Dumbledore with a jet of bright blue light with a slight tinge of green (possibly the killing curse), which Dumbledore – whilst pushing Harry through the air and out of the way with a hand gesture …

Could Dumbledore beat Voldemort with the elder wand?

No. The short answer is that Dumbledore’s greatest accomplishment in a duel with his original wand was to barely defeat Grindelwald, because he had the Elder Wand at the time. So there is no way he would be able to defeat Voldemort.

What spell does Newt use to break the window?

Finestra is the incantation of a spell used by Newt Scamander to shatter the window of a jewelry shop while trying to catch his runaway Niffler in New York City (WFT).

Did Dumbledore taunt Voldemort before the duel?

— Dumbledore and Voldemort taunt each other briefly prior to the duel [src] The duel in the Atrium of the Ministry of Magic was a critical duel fought between Albus Dumbledore and Lord Voldemort in the Atrium of the Ministry of Magic at the end of the Battle of the Department of Mysteries in June of 1996.

When did Dumbledore first use the Deathly Hallows spell?

— Description of the spell [src] This spell was used by Dumbledore in the Ministry of Magic, during the Battle of the Department of Mysteries on 18 June 1996, when he was duelling with Lord Voldemort.

What happened to Voldemort’s curse on Harry?

Voldemort attempts several times to direct his curse (still locked and clashing with Dumbledore’s own spell) towards Harry, with lightning-like tendrils popping off from the main beam, but is unsuccessful and instead hits three fireplaces near Harry, causing tiles to explode and parts of the fireplace to come crashing down on the wooden floors.

How did Voldemort turn into a snake and kill Dumbledore?

Dumbledore then cast a fiery rope around Voldemort, which Voldemort transfigured into a snake and sent after Dumbledore. The snake served as an attack and as a distraction for Voldemort to Disapparate and Apparate in the middle of the fountain, sending another Killing Curse at Dumbledore.