First I.P. of Be is greater than B.

First I.P. of N is greater than O Explain.

The first I.P. of 'C' is greater than of 'B' where as reverse is true for second I.P. Explain.

Two protons P and Q moving with the same speed enter magnetic fields B_1 and B_2 respectively at right angles to the field directions. If B_2 is greater than B_1 , for which of the protons P and Q,the circular path in the -magnetic will be a smaller radius?

Two protons P and Q moving with the same speed enter magnetic field B_(1)andB_(2) respectively at right angles to the field directions. If B_(2) is greater than B_(1) for which of the protons P and Q the circular path in the magnetic field will have a smaller radius?

The first ionisation energy of the Be is greater than that of B but the second ionisation energy of Be is less than that of B. explain.

Ionisationn enthalpy of Be is greater than that of B-why?

2nd ionisation potential of Be is greater than the 1st ionisation potential of B but less than 2nd ionisation potential of B - explain .

Electron affinity of chlorine is greater than that of fluorine . Explain .

This question has Statement I and Statement II. Of the four choices given after the Statements, choose the one that best describes the two Statements. Statement - I: van der Waals’ constant ‘b’ of N_2 is greater than that of NH_3 Statement - II: Molecular Size of N_2 is smaller than that of NH_3 .