IIT-JEE Exam

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

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IIT-JEE Other Question

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]-
Consider a titration of potassium dichromate solution with acidified Mohr’s salt solution using diphenylamine as
indicator. The number of moles of Mohr’s salt required per mole of dichromate is
(A) 3 (B) 4
(C) 5 (D) 6