The series of processes by which nitrogen and its compounds are inter-converted in the environment and in living organisms is called _____ .
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Which one of the following is a cation?
Which of the following elements has the lowest melting point?
......... is a deliquescent compound.
Which among the following is used to generate light, to weld metals?
Atomic explosion is triggered by
Which of the following gases is known as "Laughing Gas"?
Which of the following is not a nitrogenous fertiliser?