The ionization enthalpy of hydrogen atom is 1.312 x 106

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The ionization enthalpy of hydrogen atom is 1.312 x 10⁶ J Mol^-1. The energy required to excite the electron in the atom from level n = 1 to n = 2 is

[DSSSB TGT 2014 (Science)]

A 9.84 x 105 J Mol-1

B 6.56 x 105 J Mol-1

C 8.51 x 105 J Mol-1

D 3.56 x 105 J Mol-1