The Hertzsprung-Russell Diagram

Answer the questions using the above HR Diagram

1. What factor affects the color of a star?

2. What is luminosity?

3. What factor affects the luminosity of a star?

4. What is the approximate surface temperature of the sun?

5. What is the color of the stars with the highest surface temperature?

6. What type of star has a high temperature but a low luminosity?

7. Most of the stars on the HR Diagram are classified as which type of star?

8. How is it possible for white dwarfs to have a lower luminosity than the sun even though the sun is cooler than white dwarfs?

9. What is the color of the stars with the lowest surface temperature?
10. What type of star has a low temperature but a high luminosity?

some of the qualities most frequently associated with the baroque are grandeur, sensuous richness, drama, vitality, movement, tension, emotional exuberance, and a tendency to blur distinctions between the various arts.

the role of the microscope world in creating new materials .

hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.