#2) has no answer, because part of the question is missing.
None of the other statements is true.
#1). The Sun is the brightest star in the sky, and Sirius comes next.
#2).
#3). You can see 6 planets from Earth without a telescope:
Mercury, Venus, Earth, Mars, Jupiter, and Saturn.
#4). The main components of most stars are Hydrogen and Helium.
#5). The difference in what time a constellation rises and sets
at different times of the year is related to the Earth's orbital
revolution around the Sun.