It is observed that characteristic X-ray spectra of elements show regularity. When frequency to the power "n" i.e. $${v^n}$$ of X-rays emitted is plotted against atomic number "Z", following graph is obtained.

The value of 'n' is :

Which of the Phosphorus oxoacid can create silver mirror from $$\mathrm{AgNO_3}$$ solution?

Increasing order of stability of the resonance structures is :

Choose the correct answer from the options given below :

For independent process at 300 K

The number of non-spontaneous process from the following is __________