The hottest stars are supernova explosions, which may reach temperatures around a billion kelvin in the star's core.
stars are hotter
Its colour. White stars are hotter than blue stars which are hotter than yellow which are hotter than orange, which are hotter than red.
Technically Blue stars are hotter but from your options, white stars are hotter.
No. K spectral type stars (which are orange) temperature is ranging from 5,000-3,500. A spectral type stars (which are blue-white) temperature is ranging from 7,500-11,000.
White Dwarves and Blue giants are both hotter than Red giant stars.
yes
Hotter.
blue stars are hotter
As they get hotter, they usually get brighter.
False. Blue giants(or hypergiants) are hotter than Red giant stars. White dwarves are also hotter but they are smaller than blue giants. (As is implied by the name.)
The sun is hotter than red stars but cooler than blue stars,
The stars with an A-type spectrum are the hottest common stars, but early-stage stars with a B-type spectrum are even hotter. The order of temperature is B-A-F-G-K-M for common stars. The M-type stars are the coolest common stars and they definitely look red, e.g. Antares, Betelgeuse. Remember the order by learning this: Be A Fine Girl, Kiss Me!