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question_answer1)
The value of \[x\] in the partial redox equation \[MnO_{4}^{-}+8{{H}^{+}}+xe\] ⇌\[M{{n}^{2+}}+4{{H}_{2}}O\] is
A)
5 done
clear
B)
3 done
clear
C)
1 done
clear
D)
0 done
clear
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question_answer2)
\[{{C}_{2}}{{H}_{6}}(g)+n{{O}_{2}}\,\to \,C{{O}_{2}}\,(g)+{{H}_{2}}O\,(l)\] In this equation, the ratio of the coefficients of \[C{{O}_{2}}\]and \[{{H}_{2}}O\] is [KCET 1992]
A)
1 : 1 done
clear
B)
2 : 3 done
clear
C)
3 : 2 done
clear
D)
1 : 3 done
clear
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question_answer3)
The number of electrons involved in the reduction of \[C{{r}_{2}}O_{7}^{2-}\]in acidic solution to \[C{{r}^{3+}}\]is [EAMCET 1983]
A)
0 done
clear
B)
2 done
clear
C)
3 done
clear
D)
5 done
clear
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question_answer4)
When \[KMn{{O}_{4}}\] acts as an oxidising agent and ultimately forms \[{{[\,Mn{{O}_{4}}]}^{-2}},\,\,Mn{{O}_{2}},\,\,\,M{{n}_{2}}{{O}_{3}},\,\,M{{n}^{+2}}\] then the number of electrons transferred in each case respectively is [AIEEE 2002]
A)
4, 3, 1, 5 done
clear
B)
1, 5, 3, 7 done
clear
C)
1, 3, 4, 5 done
clear
D)
3, 5, 7, 1 done
clear
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question_answer5)
Starch paper is used to test for the presence of [NCERT 1979]
A)
Iodine done
clear
B)
Oxidising agent done
clear
C)
Iodide ion done
clear
D)
Reducing agent done
clear
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question_answer6)
How many moles of \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] can be reduced by 1 mole of \[S{{n}^{2+}}\] [MP PMT 2003]
A)
1/3 done
clear
B)
1/6 done
clear
C)
2/3 done
clear
D)
1 done
clear
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question_answer7)
\[2MnO_{4}^{-}+5{{H}_{2}}{{O}_{2}}+6{{H}^{+}}\to 2\,\,Z+5{{O}_{2}}+8{{H}_{2}}O\]. In this reaction Z is [RPMT 2002]
A)
\[M{{n}^{+2}}\] done
clear
B)
\[M{{n}^{+4}}\] done
clear
C)
\[Mn{{O}_{2}}^{{}}\] done
clear
D)
\[Mn\] done
clear
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question_answer8)
What is ?A? in the following reaction \[2F{{e}^{3+}}_{(aq)}+S{{n}^{2+}}_{(aq)}\to 2F{{e}^{2+}}_{(aq)}+A\] [MP PET 2003]
A)
\[S{{n}^{3+}}_{(aq)}\] done
clear
B)
\[S{{n}^{4+}}_{(aq)}\] done
clear
C)
\[S{{n}^{2+}}_{(aq)}\] done
clear
D)
Sn done
clear
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question_answer9)
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 [IIT 1988, 92; BHU 1995; CPMT 1997; RPMT 1999; DCE 2000; MP PET 2003]
A)
\[MnO_{4}^{-}\] \[{{C}_{2}}O_{4}^{2-}\] \[{{H}^{+}}\] 2 5 16 done
clear
B)
16 5 2 done
clear
C)
5 16 2 done
clear
D)
2 16 5 done
clear
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question_answer10)
Which of the following is a redox reaction [AIEEE 2002]
A)
\[NaCl+KN{{O}_{3}}\to NaN{{O}_{3}}+KCl\] done
clear
B)
\[Ca{{C}_{2}}{{O}_{4}}+2HCl\to CaC{{l}_{2}}+{{H}_{2}}{{C}_{2}}{{O}_{4}}\] done
clear
C)
\[Mg{{(OH)}_{2}}+2N{{H}_{4}}Cl\to MgC{{l}_{2}}+2N{{H}_{4}}OH\] done
clear
D)
\[Zn+2AgCN\to 2Ag+Zn{{(CN)}_{2}}\] done
clear
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question_answer11)
Which of the following reaction is a redox reaction [MP PMT 2003]
A)
\[{{P}_{2}}{{O}_{5}}+2{{H}_{2}}O\to {{H}_{4}}{{P}_{2}}{{O}_{7}}\] done
clear
B)
\[2AgN{{O}_{3}}+BaC{{l}_{2}}\to 2AgCl+Ba{{(N{{O}_{3}})}_{2}}\] done
clear
C)
\[BaC{{l}_{2}}+{{H}_{2}}S{{O}_{4}}\to BaS{{O}_{4}}+2HCl\] done
clear
D)
\[Cu+2AgN{{O}_{3}}\to 2Ag+Cu{{(N{{O}_{3}})}_{2}}\] done
clear
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question_answer12)
Which of the following reactions involves oxidation-reduction [NCERT 1972; AFMC 2000; Pb. CET 2004; CPMT 2004]
A)
\[NaBr+HCl\,\to \,NaCl+HBr\] done
clear
B)
\[HBr+AgN{{O}_{3}}\,\to \,AgBr+HN{{O}_{3}}\] done
clear
C)
\[{{H}_{2}}+B{{r}_{2}}\,\to \,2HBr\] done
clear
D)
\[2NaOH+{{H}_{2}}S{{O}_{4}}\,\to \,N{{a}_{2}}S{{O}_{4}}+2{{H}_{2}}O\] done
clear
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question_answer13)
Which of the following is the strongest oxidising agent [Pb. CET 2000]
A)
\[BrO_{3}^{-}/B{{r}^{2+}},\,{{E}^{o}}=+1.50\] done
clear
B)
\[F{{e}^{3+}}/F{{e}^{2+}},\,{{E}^{o}}=+0.76\] done
clear
C)
\[MnO_{4}^{-}/M{{n}^{2+}},\,{{E}^{o}}=+1.52\] done
clear
D)
\[C{{r}_{2}}O_{7}^{2-}/C{{r}^{3+}},\,{{E}^{o}}=+1.33\] done
clear
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question_answer14)
In the balanced chemical reaction, \[IO_{3}^{-}+a\ {{I}^{-}}+b\ {{H}^{+}}\to c\ {{H}_{2}}O+d\ {{I}_{2}}\] a, b, c and d respectively correspond to [AIIMS 2005]
A)
5, 6, 3, 3 done
clear
B)
5, 3, 6, 3 done
clear
C)
3, 5, 3, 6 done
clear
D)
5, 6, 5, 5 done
clear
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question_answer15)
The number of moles of \[KMn{{O}_{4}}\]reduced by one mole of KI in alkaline medium is: [CBSE PMT 2005]
A)
One fifth done
clear
B)
five done
clear
C)
One done
clear
D)
Two done
clear
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