1
IIT-JEE 2000 Screening
MCQ (Single Correct Answer)
+2
-0.5
Amongst the following identify the species with an atom in +6 oxidation state
A
$$MnO_4^ - $$
B
$$Cr(CN)_6^{3 - }$$
C
$$NiF_6^{2 - }$$
D
$$Cr{O_2}C{l_2}$$
2
IIT-JEE 1999
MCQ (Single Correct Answer)
+2
-0.5
The normality of 0.3 M phosphorus acid (H3PO3) is
A
0.1
B
0.9
C
0.3
D
0.6
3
IIT-JEE 1999
MCQ (Single Correct Answer)
+2
-0.5
The oxidation number of sulphur in S8,S2F2,H2S respectively, are
A
0, +1 and -2
B
+2, +1 and -2
C
0, +1 and +2
D
-2, +1 and -2
4
IIT-JEE 1992
MCQ (Single Correct Answer)
+1
-0.25
For the redox reaction:
$$MnO_4^ - + {C_2}O_4^{ - 2} + {H^ + }$$ $$ \to M{n^{2 + }} + C{O_2} + {H_2}O$$
The correct coefficients of the reactants for the balanced reaction are
A
$$MnO_4^ - \,\, \to \,\,2,\,\,{C_2}O_4^{2 - }\, \to \,\,5,\,{H^ + } \to \,\,16$$
B
$$MnO_4^ - \,\, \to \,\,16,\,\,{C_2}O_4^{2 - }\, \to \,\,5,\,{H^ + } \to \,\,2$$
C
$$MnO_4^ - \,\, \to \,\,5,\,\,{C_2}O_4^{2 - }\, \to \,\,16,\,{H^ + } \to \,\,2$$
D
$$MnO_4^ - \,\, \to \,\,2,\,\,{C_2}O_4^{2 - }\, \to \,\,16,\,{H^ + } \to \,\,5$$
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