1
JEE Advanced 2018 Paper 1 Offline
Numerical
+3
-0
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Among the species given below, the total number of diamagnetic species is _____________.

$$H$$ atom, $$N{O_2}$$ monomer, $${O_2}^ - $$ (superoxide), dimeric sulphur in vapor phase, $$M{n_3}{O_4},\,\,$$ $${\left( {N{H_4}} \right)_2}\left[ {FeC{l_4}} \right],$$ $${\left( {N{H_4}} \right)_2}\left[ {NiC{l_4}} \right],\,$$ $$\,{K_2}Mn{O_4},\,$$$${K_2}Cr{O_4}$$
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2
JEE Advanced 2014 Paper 1 Offline
Numerical
+3
-0
Among PbS, CuS, HgS, MnS, Ag2S, NiS, CoS, Bi2S3 and SnS2 the total number of black coloured sulphides is
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3
IIT-JEE 2009 Paper 2 Offline
Numerical
+3
-1

The oxidation number of Mn in the product of alkaline oxidative fusion of MnO$$_2$$ is ___________.

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