The Snake-Vanishing Spell (Vipera Evanesca) was a transfiguration spell that vanished snakes.

What spell does Bellatrix choke with?

This spell would be “Reducto”,a curse used to shatter and object to pieces.As seen in the movie,Bellatrix actually shatters,instead of dropping dead.

What is Levicorpus spell?

The Dangling Jinx (Levicorpus) was a jinx, which was intended to be cast nonverbally but the incantation could also be spoken aloud, caused the victim to be hoisted into the air by their ankle; the counter-jinx for this jinx was Liberacorpus.