By which method/process is ammonia gas manufactured?

In the froth flotation process,which particles get wetted by turpentine and rise to the surface of the liquid mixture with the froth?

In which state does the element phosphorus exist at room temperature?

$A$ metal $E$ is stored under kerosene oil. When a small piece of it is left open in the air,it catches fire. When the product formed is dissolved in water,it turns red litmus blue.
$(i)$ Name the metal $E$.
$(ii)$ Write the chemical equations for the reaction when it is exposed to air and when the product is dissolved in water.
$(iii)$ Explain the process by which the metal is obtained from its molten chloride.

Which of the following is $NOT$ the correct order of reactivity of metals?

How can metals be differentiated from non-metals on the basis of any three chemical properties?