1
JEE Advanced 2017 Paper 2 Offline
MCQ (Single Correct Answer)
+3
-0.75
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The order of the oxidation state of the phosphorous atom in

$${H_3}P{O_2},{H_3}P{O_4},{H_3}P{O_3}$$ and $${H_4}{P_2}{O_6}$$ is
A
$${H_3}P{O_3} > {H_3}P{O_2} > {H_3}P{O_4} > {H_4}{P_2}{O_6}$$
B
$${H_3}P{O_4} > {H_3}P{O_2} > {H_3}P{O_3} > {H_4}{P_2}{O_6}$$
C
$${H_3}P{O_4} > {H_4}{P_2}{O_6} > {H_3}P{O_3} > {H_3}P{O_2}$$
D
$${H_3}P{O_2} > {H_3}P{O_3} > {H_4}{P_2}{O_6} > {H_3}P{O_4}$$
2
IIT-JEE 2001 Screening
MCQ (Single Correct Answer)
+2
-0.5
The reaction, $$3Cl{O^ - }(aq)$$$$ \to ClO_3^ - (aq) + 2C{l^ - }(aq)$$ is an example of :
A
Oxidation reaction
B
Reduction reaction
C
Disproportionate reaction
D
Decomposition reaction
3
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
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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