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question_answer1)
In which of the following acid, which acid has oxidation reduction and complex formation properties [UPSEAT 2001]
A)
\[HN{{O}_{3}}\] done
clear
B)
\[{{H}_{2}}S{{O}_{4}}\] done
clear
C)
\[HCl\] done
clear
D)
\[HN{{O}_{2}}\] done
clear
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question_answer2)
The compound which could not act both as oxidising as well as reducing agent is [IIT Screening 1991]
A)
\[S{{O}_{2}}\] done
clear
B)
\[Mn{{O}_{2}}\] done
clear
C)
\[A{{l}_{2}}{{O}_{3}}\] done
clear
D)
\[CrO\] done
clear
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question_answer3)
\[{{H}_{2}}S\] acts only as a reducing agent while \[S{{O}_{2}}\]can act both as a reducing and oxidizing agent because [AMU 1999]
A)
\[S\]in \[{{H}_{2}}S\]has - 2 oxidation state done
clear
B)
\[S\]in \[S{{O}_{2}}\]has oxidation state + 4 done
clear
C)
Hydrogen in \[{{H}_{2}}S\]more +ve than oxygen done
clear
D)
Oxygen is more - ve in \[S{{O}_{2}}\] done
clear
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question_answer4)
Of all the three common mineral acids, only sulphuric acid is found to be suitable for making the solution acidic because [Kurukshetra CEE 2002]
A)
It does not react with \[KMn{{O}_{4}}\] or the reducing agent done
clear
B)
Hydrochloric acid reacts with \[KMn{{O}_{4}}\] done
clear
C)
Nitric acid is an oxidising agent which reacts with reducing agent done
clear
D)
All of the above are correct done
clear
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question_answer5)
For \[{{H}_{3}}P{{O}_{3}}\] and \[{{H}_{3}}P{{O}_{4}}\] the correct choice is [IIT Screening 2003]
A)
\[{{H}_{3}}P{{O}_{3}}\] is dibasic and reducing done
clear
B)
\[{{H}_{3}}P{{O}_{3}}\] is dibasic and non-reducing done
clear
C)
\[{{H}_{3}}P{{O}_{4}}\] is tribasic and reducing done
clear
D)
\[{{H}_{3}}P{{O}_{3}}\] is tribasic and non-reducing done
clear
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question_answer6)
Match List I with List II and select the correct answer using the codes given below the lists
|
List I (Compound) |
|
List II (Oxidation state of N) |
A |
\[N{{O}_{2}}\] |
1 |
+5 |
B |
\[HNO\] |
2 |
-3 |
C |
\[N{{H}_{3}}\] |
3 |
+4 |
D |
\[{{N}_{2}}{{O}_{5}}\] |
4 |
+1 |
A)
A-2 B-3 C-4 D-1 done
clear
B)
A-3 B-1 C-2 D-4 done
clear
C)
A-3 B-4 C-2 D-1 done
clear
D)
A-2 B-3 C-1 D-4 done
clear
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question_answer7)
\[{{M}^{+3}}\] ion loses \[3{{e}^{-}}\]. Its oxidation number will be [CPMT 2002]
A)
0 done
clear
B)
+ 3 done
clear
C)
+ 6 done
clear
D)
? 3 done
clear
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question_answer8)
In the reaction \[Zn+2{{H}^{+}}+2C{{l}^{-}}\to Z{{n}^{2+}}+2C{{l}^{-}}+{{H}_{2}}\], the spectator ion is [AIIMS 2001]
A)
\[C{{l}^{-}}\] done
clear
B)
\[Z{{n}^{2+}}\] done
clear
C)
\[{{H}^{+}}\] done
clear
D)
All of these done
clear
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question_answer9)
The oxidation number of sulphur in \[{{H}_{2}}{{S}_{2}}{{O}_{7}}\] and iron in \[{{K}_{4}}Fe{{(CN)}_{6}}\] is respectively [AIIMS 2000]
A)
+ 6 and + 2 done
clear
B)
+ 2 and + 2 done
clear
C)
+ 8 and + 2 done
clear
D)
+ 6 and + 4 done
clear
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question_answer10)
Oxidation number of oxygen in potassium super oxide \[(K{{O}_{2}})\] is [UPSEAT 1999, 2002]
A)
- 2 done
clear
B)
- 1 done
clear
C)
- 1/2 done
clear
D)
- 1/4 done
clear
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question_answer11)
One mole of \[{{N}_{2}}{{H}_{4}}\] loses 10 mol of electrons to form a new compound Y. Assuming that all nitrogen appear in the new compound, what is the oxidation state of \[{{N}_{2}}\]in Y ? (There is no change in the oxidation state of hydrogen) [IIT 1981; Pb. PMT 1998]
A)
+ 3 done
clear
B)
- 3 done
clear
C)
- 1 done
clear
D)
+ 5 done
clear
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question_answer12)
Amongst the following identify the species with an atom in + 6 oxidation state [IIT Screening 2000]
A)
\[MnO_{4}^{-}\] done
clear
B)
\[Cr(CN)_{6}^{3-}\] done
clear
C)
\[NiF_{6}^{2-}\] done
clear
D)
\[Cr{{O}_{2}}C{{l}_{2}}\] done
clear
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question_answer13)
In which of the following compounds, is the oxidation number of iodine is fractional [BVP 2003]
A)
\[I{{F}_{3}}\] done
clear
B)
\[I{{F}_{2}}\] done
clear
C)
\[I_{3}^{-}\] done
clear
D)
\[I{{F}_{7}}\] done
clear
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question_answer14)
The compound \[YB{{a}_{2}}C{{u}_{3}}{{O}_{7}}\] which shows superconductivity has copper in oxidation state ........ Assume that the rare earth element Yttrium is in its usual \[+\,3\] oxidation state [IIT 1994]
A)
3/7 done
clear
B)
7/3 done
clear
C)
3 done
clear
D)
7 done
clear
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question_answer15)
The oxidation number of sulphur in \[{{S}_{8}},\,{{S}_{2}}{{F}_{2}},\,{{H}_{2}}S\] respectively, are [IIT 1999]
A)
0, +1 and - 2 done
clear
B)
+ 2, +1 and - 2 done
clear
C)
0, + 1 and + 2 done
clear
D)
- 2, + 1 and - 2 done
clear
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question_answer16)
Which one of the following reactions is not an example of redox reaction [Kurukshetra CEE 1998]
A)
\[C{{l}_{2}}+2{{H}_{2}}O+S{{O}_{2}}\to 4{{H}^{+}}+S{{O}^{4-}}+2C{{l}^{-}}\] done
clear
B)
\[C{{u}^{++}}+Zn\to Z{{n}^{++}}+Cu\] done
clear
C)
\[2{{H}_{2}}+{{O}_{2}}\to 2{{H}_{2}}O\] done
clear
D)
\[HCl+{{H}_{2}}O\to {{H}_{3}}{{O}^{-}}+C{{l}^{-}}\] done
clear
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question_answer17)
For the reactions, \[C+{{O}_{2}}\to C{{O}_{2}};\Delta H=-393J\] \[2\,\,Zn+{{O}_{2}}\to 2\,\,ZnO;\Delta H=-412J\] [AIEEE 2002]
A)
Carbon can oxidise \[Zn\] done
clear
B)
Oxidation of carbon is not feasible done
clear
C)
Oxidation of \[Zn\]is not feasible done
clear
D)
\[Zn\] can oxidise carbon done
clear
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question_answer18)
In the reaction \[{{B}_{2}}{{H}_{6}}+2KOH+2X\to 2Y+6{{H}_{2}},\] X and Y are respectively [EAMCET 2003]
A)
\[{{H}_{2}}\],\[{{H}_{3}}B{{O}_{3}}\] done
clear
B)
\[HCl\],\[KB{{O}_{3}}\] done
clear
C)
\[{{H}_{2}}O,\,\,KB{{O}_{3}}\] done
clear
D)
\[{{H}_{2}}O\],\[KB{{O}_{2}}\] done
clear
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question_answer19)
In a balanced equation \[{{H}_{2}}S{{O}_{4}}+x\,HI\to {{H}_{2}}S+y\,{{I}_{2}}+z\,{{H}_{2}}O\], the values of x, y, z are [EAMCET 2003]
A)
x = 3, y = 5, z = 2 done
clear
B)
x = 4, y = 8, z = 5 done
clear
C)
x = 8, y = 4, z = 4 done
clear
D)
x = 5, y = 3, z = 4 done
clear
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question_answer20)
Which of the following can act as an acid and as a base [AMU 1999]
A)
\[HClO_{3}^{-}\] done
clear
B)
\[{{H}_{2}}PO_{4}^{-}\] done
clear
C)
\[H{{S}^{-}}\] done
clear
D)
All of these done
clear
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question_answer21)
\[MnO_{4}^{2-}\] (1 mole) in neutral aqueous medium is disproportionate to [AIIMS 2003]
A)
2/3 mole of \[MnO_{4}^{-}\] and 1/3 mole of\[Mn{{O}_{2}}\] done
clear
B)
1/3 mole of \[MnO_{4}^{-}\] and 2/3 mole of \[Mn{{O}_{2}}\] done
clear
C)
1/3 mole of \[M{{n}_{2}}{{O}_{7}}\]and 1/3 mole of \[Mn{{O}_{2}}\] done
clear
D)
2/3 mole of \[M{{n}_{2}}{{O}_{7}}\] and 1/3 mole of \[Mn{{O}_{2}}\] done
clear
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question_answer22)
The conductivity of a saturated solution of \[BaS{{O}_{4}}\] is \[3.06\times {{10}^{-6}}\,oh{{m}^{-1}}\,c{{m}^{-1}}\] and its equivalent conductance is \[1.53\,oh{{m}^{-1}}\,c{{m}^{-1}}\,equivalen{{t}^{-1}}\]. The \[{{K}_{sp}}\] of the \[BaS{{O}_{4}}\] will be [KCET 1996]
A)
\[4\,\times {{10}^{-12}}\] done
clear
B)
\[2.5\times {{10}^{-9}}\] done
clear
C)
\[2.5\times {{10}^{-13}}\] done
clear
D)
\[4\times {{10}^{-6}}\] done
clear
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question_answer23)
When \[Mn{{O}_{2}}\] is fused with KOH, a coloured compound is formed, the product and its colour is [IIT Screening 2003]
A)
\[{{K}_{2}}Mn{{O}_{4}}\], purple green done
clear
B)
\[KMn{{O}_{4}}\], purple done
clear
C)
\[M{{n}_{2}}{{O}_{3}}\], brown done
clear
D)
\[M{{n}_{3}}{{O}_{4}}\]black done
clear
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