Name the methods employed in animal breeding. According to you which of the method is best and why?

Name and define two major methods of animal breeding?

Name two barrier methods used in contraception.

Name the method for estimation of Halogen

What is the name of the method that is used in manufacturing of sodium hydroxide? Explain the method.Write the equations of the reactions involved in this process

Froth flotation process, hydraulic washing, magnetic separation, leaching etc are some methods for concentration of ores? Which of this methods is useful for the separation of copper pyrites? b) Write the reason for choosing this method.

Name the surgical methods of birth control. write the merit and demerit of the above methods.