1. A sodium salt of an unknown anion when treated with MgCl2 gives white precipitate only on boiling.
The anion is
(a) SO42- (b) HCO3- (c) CO3 2- (d) NO3-
2. Which hydrogen like species will have same radius as that of Bohr orbit of hydrogen atom?
(a) n = 2, Li+2 (b) n = 2, Be3+ (c) n = 2, He+ (d) n = 3, Li2+
3. 0.004 M Na2SO4 is isotonic with 0.01 M glucose. Degree of dissociation of Na2SO4 is
(a) 75% (b) 50% (c) 25% (d) 85%
4. Number of lone pair(s) in XeOF4 is/are:
(a) 0 (b) 1 (c) 2 (d) 3
5. According to MO Theory,
(a) O2+ is paramagnetic and bond order greater than O2
(b) O2+ is paramagnetic and bond order less than O2
(c) O2+ is diamagnetic and bond order less than O2
(d) O2+ is diamagnetic and bond order is more than O2