IIT-JEE Exam

Among the following metal carbonyls, the C – O bond order is lowest in
(A) [Mn(CO)6]+ (B) [Fe(CO)5]
(C) [Cr(CO)6] (D) [V(CO)6]-

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IIT-JEE Other Question

Consider a reaction aG + bH → Products. When concentration of both the reactants G and H is doubled, the rate
increases by eight times. However, when concentration of G is doubled keeping the concentration of H fixed, the rate is
doubled. The overall order of the reaction is
(A) 0 (B) 1
(C) 2 (D) 3 A positron is emitted from 23
Na11 . The ratio of the atomic mass and atomic number of the resulting nuclide is
(A) 22/10 (B) 22/11
(C) 23/10 (D) 23/12