IIT-JEE Exam

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 -

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IIT-JEE Other Question

Experimentally it was found that a metal oxide has
formula M0.98O. Metal M, is present as M2+ and
M3+ in its oxide. Fraction of the metal which exists
as M3+ would be -
(1) 6.05% (2) 5.08%
(3) 7.01% (4) 4.08% 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