SECTION 2 (Maximum Marks: 24)
• This section contains EIGHT (08) questions. The answer to each question is a NUMERICAL VALUE.
• For each question, enter the correct numerical value (in decimal notation, truncated/rounded-off to the second decimal place; e.g. 6.25, 7.00, -0.33, -.30, 30.27, -127.30) using the mouse and the on-screen virtual numeric keypad in the place designated to enter the answer.
• Answer to each question will be evaluated according to the following marking scheme:
Full Marks: +3 If ONLY the correct numerical value is entered as answer.
Zero Marks: 0 In all other cases.
Among the species given below, the total number of diamagnetic species is___.
H atom, NO 2 monomer, 
(superoxide), dimeric sulphur in vapour phase, Mn 3 O 4 , (NH4) 2 [FeCl 4 ], (NH 4 ) 2 [NiCl 4 ], K 2 MnO 4 , K 2 CrO 4
Text Solution
Verified by Experts1
(1)
Paramagnetic: H NO 2 monomer 
(superoxide), S 2 (Vapour), [Mn 3 O 4 is mixed oxide of Mn +2 and Mn +3 ],
(NH4) 2 [FeCl 4 ], (NH 4 ) 2 [NiCl 4 ], K 2 MnO 4 Diamagnetic: K 2 CrO 4
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