Which one is correct about CH2 = CCl2?

(1) Both carbon are in +2 oxidation state.

(2)  Both carbon are in +- oxidation state.

(3) Once carbon has +2 and other -2 oxidation state.

(4) The average oxidation number of carbon is +1.

Subtopic:  Balancing of Equations |
 83%
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What is the equivalent weight of H3PO3 in the following disproportionation reaction:-

H3POH3PO4 + PH3

1. M6   

 2. M2 

3.  2M3 

 4. M3

Subtopic:  Equivalent Weight |
 51%
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25.0 g of FeSO4.7H2O was dissolved in water containing dilute H2SO4, and the volume was made up to 1.0 L. 25.0 mL of this solution required 20 mL of an N/10 KMnO4 solution for complete oxidation. The percentage of FeSO4. 7H2O in the acid solution is

(1) 78%

(2) 98%

(3) 89%

(4) 79%

Subtopic:  Redox Titration & Type of Redox |
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Which one of the following orders correctly represents the increasing acid strengths of the given acids?

(1) HOCl<HOClO<HOClO2<HOClO3

(2) HOClO<HOCl<HOClO3<HOClO2

(3) HOClO2<HOClO3<HOClO<HOCl

(4) HOClO3>HOClO2<HOClO<HOCl

Subtopic:  Oxidizing & Reducing Agents |
 85%
From NCERT
NEET - 2007
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The valency of Cr in the complex [Cr(H2O)4Cl2]+ [MP PMT 2000]

(1) 1

(2) 3

(3) 5

(4) 6

Subtopic:  Oxidizing & Reducing Agents |
 76%
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Oxidation number of cobalt in K[Co(CO)4] is

(1) + 1

(2) + 3

(3) – 1

(4) – 3

Subtopic:  Oxidizing & Reducing Agents |
 79%
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The oxidation number of phosphorus in Ba(H2PO2)2 is [Kurukshetra CEE 1998; DCE 2004]

(1) – 1

(2) + 1

(3) + 2

(4) + 3

Subtopic:  Oxidizing & Reducing Agents |
 67%
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When KMnO4 acts as an oxidising agent and ultimately forms [MnO4]2,  MnO2,   Mn2O3,  Mn+2 then the number of electrons transferred in each case respectively is [AIEEE 2002]

(1) 4, 3, 1, 5

(2) 1, 5, 3, 7

(3) 1, 3, 4, 5

(4) 3, 5, 7, 1

Subtopic:  Application of Electrode Potential |
 84%
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For the redox reaction MnO4+C2O42+H+Mn2++CO2+H2O the correct coefficients of the reactants for the balanced reaction are [IIT 1988, 92; BHU 1995; CPMT 1997; RPMT 1999; DCE 2000; MP PET 2003]

 

MnO4  

C2O42  

H+

(1)  

 2

5

16

(2)

16

5

2

(3)

5

16

2

(4)

2

16

5

Subtopic:  Balancing of Equations |
 81%
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Which of the following is the strongest oxidising agent [Pb. CET 2000]

(1) BrO3/Br2+,Eo=+1.50

(2) Fe3+/Fe2+,Eo=+0.76

(3) MnO4/Mn2+,Eo=+1.52

(4) Cr2O72/Cr3+,Eo=+1.33

Subtopic:  Emf & Electrode Potential |
 79%
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