IIT-JEE Exam

The first ionisation potential of Na is 5.1 eV. The
value of electron gain enthalpy of Na+ will be -
(1) – 10.2 eV (2) + 2.55 eV
(3) – 2.55 eV (4) – 5.1 eV

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IIT-JEE Other Question

For gaseous state, if most probable speed is
denoted by C*, average speed by C and mean
square speed by C, then for a large number of
molecules the ratios of these speeds are - Four successive members of the first row transition
elements are listed below with atomic numbers.
Which one of them is expected to have the highest
0
EM3+ /M2+ value ?
(1) Fe(Z = 26) (2) Co(Z = 27)
(3) Cr(Z = 24) (4) Mn(Z = 25)