InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
The reagent(s) used for softening the temporary hardness of water is (are):A. `Ca,(PO_(4)),`B. `Ca(OH)_(2)`C. `Na_(2)CO_(3)`D. `NaOCl` |
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Answer» Correct Answer - B |
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| 52. |
1.78N of `H_(2)O_(2)` solution is :A. 10 volumes of `H_(2)O_(2)`B. 3.03% `((w)/(v))` of `H_(2)O_(2)`C. 2.56M `H_(2)O_(2)`D. 1 mL `H_(2)O_(2)` liberates 10 mL of `O_(2)` at STP |
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Answer» Correct Answer - A::B::D |
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| 53. |
Which of the following statements is`//`are correct?A. `H_(2)O_(2)` is reduced to `O_(2)` by a strong reducing agentB. `H_(2)O_(2)` is a non-planer moleculeC. The formation of `CrO_(5)` from `Cr_(2)O_(7)^(2-)` ion by the action of `H_(2)O_(2)` in an acid medium is not a redox reductionD. `H_(2)O_(2)` is oxidised to `OH^(-)` ions by a two electron change |
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Answer» Correct Answer - A::B::D |
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| 54. |
(i)`[Fe(CN)_(6)]^(x-)+H_(2)O_(2)+H^(+)to[Fe(CN)_(6)]^(y-)+H_(2)O` (ii) `[Fe(CN)_(6)]^(p-)+H_(2)O_(2)+OH^(-)to[Fe(CN)_(6)]^(q-)+H_(2)O` Select the correct statements:A. x and y are 3 and 4 respectivelyB. p and q are 3 and 4 respectivelyC. in (i), `H_(2)O_(2)` acts as an oxidising agentD. In (ii), `H_(2)O_(2)` acts as an reducing agent |
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Answer» Correct Answer - A::B::C::D |
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| 55. |
`Fe^(3+)` is reduced to `Fe^(3+)` by singA. `H_(2)O_(2)` in presence of `NaOH`B. `Na_(2)O_(2)` in waterC. `H_(2)O_(2)` in presence of `H_(2)SO_(4)`D. `Na_(2)O_(2)` in presence of `H_(2)SO_(4)` |
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Answer» Correct Answer - C::D |
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| 56. |
Which of the following is reduced by `H_(2)I_(2)` in acid mediumA. `KMnO_(4)`B. KIC. `FeSO_(4)`D. `K_(4)[Fe(CN)_(6)]` |
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Answer» Correct Answer - A |
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| 57. |
The ionuzation enregy of hydrogen isA. 1312KJ `"mole"^(-1)`B. 520KJ`"mole"^(-1)`C. 495KJ`"mol"^(-1)`D. 1681KJ`"mol"^(-1)` |
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Answer» Correct Answer - D |
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| 58. |
Water softened by permutitt process containsA. Dissolved sodium saltsB. Dissolved gasesC. Does not give good lather with soapD. Dissolved calcium salts |
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Answer» Correct Answer - A |
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| 59. |
An aqueous solution of `H_(2)O_(2)`A. NeutralB. Strongly acidicC. Weakly acidicD. Weakly basic |
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Answer» Correct Answer - C |
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| 60. |
Which of the following statement is incorrectA. `H_(2)O_(2)` is an oxidising agentB. `H_(2)O_(2)` is a reducing agentC. `H_(2)O_(2)` is a bleaching agentD. `H_(2)O_(2)` is a dehydrating agent |
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Answer» Correct Answer - D |
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| 61. |
In aqueous solution, `H_(2)` will not reduce :A. `Fe^(3+)`B. `Cu^(2+)`C. `Zn^(2+)`D. `Ag^(+)` |
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Answer» Correct Answer - C |
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| 62. |
What is the nature of aqueous solution of NaHA. AcidicB. BasicC. NeutralD. Amphoteric |
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Answer» Correct Answer - B |
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| 63. |
Which one of the following statement is incorrect ?A. `H_(2)` reacts with `Cl_(2)` to form HCl, an electron pair shared between H and ClB. Hydrogen is reduced by sodium to form NaH. An electron is tranferred from H to NaC. Hydrogen reduces copper (II) oxide to cooper and itself gets oxidized to `H_(2)O`D. Hydroformylation of olefins yields aldehyde which further undergoes reduction to give alcohol. |
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Answer» Correct Answer - B |
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| 64. |
When `H_(2)O_(2)` acts as oxidizing agent, one of the end product is generallyA. `O_(2)`B. `H_(2)O`C. Both 1&2D. `O_(3)` |
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Answer» Correct Answer - B |
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| 65. |
`H_(2)O_(2)` acts as an oxidising agent inA. Acidic mediumB. In the presence of GlycerolC. Alkaline mediumD. Neutral medium |
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Answer» Correct Answer - A |
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| 66. |
For preparing `H_(2)O_(2)` in the laboratoryA. `MnO_(2)` is added to dilute cold `H_(2)SO_(4)`B. `BaO_(2)` is added to `CO_(2)` vubbling through cold waterC. `pbO_(2)` is added to an acidified solution of `KMnO_(4)`D. `Na_(2)O_(2)` is added to `CO_(2)` bubbling through cold water |
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Answer» Correct Answer - B |
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| 67. |
The raw material used for preparing permutit isA. Soda ashB. AluminaC. SilicaD. All the above |
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Answer» Correct Answer - D |
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| 68. |
Conpound obtained by passing `CO_(2)` through `BaO_(2)` in water isA. `CO`B. `Ba(OH)_(2)`C. `H_(2)O_(2)`D. `O_(2)` |
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Answer» Correct Answer - C |
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| 69. |
20 volume `H_(2)O_(2)` solution has a strength of aboutA. `30%`B. `6%`C. `3%`D. `10%` |
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Answer» Correct Answer - B |
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| 70. |
The structure of `H_(2)O_(2) `isA. Planar and tetraheassdralB. non-planer and non linearC. Trigonal planearD. Linear |
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Answer» Correct Answer - B |
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| 71. |
which one of the following contains more number of peroxy linkages ?A. `H_(2)TiO_(4)`B. `CrO_(5)`C. `H_(3)PO_(5)`D. `H_(2)S_(2)O_(8)` |
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Answer» Correct Answer - D |
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| 72. |
Temporary hardness isA. 200 ppmB. 100 ppmC. 50 ppmD. 25 ppm |
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Answer» Correct Answer - A |
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| 73. |
The temporary hardness of water is due to the presence ofA. Chlorides of Ca and MgB. Sulphates of Ca and MgC. Bicarbonates of Ca and MgD. Carbonates of Ca and Mg |
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Answer» Correct Answer - C |
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| 74. |
20 mL of `H_(2)O_(2)` is reacted completely with acidified `K_(2)Cr_(2)O_(7)` solution 40 mL of `K_(2)Cr_(2)O_(7)` solution is required to oxidise the `H_(2)O_(2)` completely. Also, 2.0 mL of the same `K_(2)Cr_(2)O_(7)` solution is required to oxidise 5.0 mL of a 1.0 M `H_(2)C_(2)O_(4)` solution to reach equivalent point. Which of the following staement is`//`are correct ?A. The `H_(2)O_(2)` solution is 5MB. The volume strength of `H_(2)O_(2)` is 56 VC. The volume strength of `H_(2)O_(2)` is 112 VD. If 40 mL more `H_(2)O_(2)` solution, the volume strength of the resulting solution is changed to 16.8 V |
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Answer» Correct Answer - A::B::D |
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| 75. |
In ice, oxygen atom is surrounded-A. Square planarB. TetrahedralC. Trigonal planarD. Angular |
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Answer» Correct Answer - B |
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| 76. |
Percentage of water present in oceansA. `2.04`B. `6.2`C. `94.8`D. `97.3` |
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Answer» Correct Answer - D |
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| 77. |
How do you expect the metallic hydrides to be useful for hydrogen storage? Explain.A. `Pd,Pt`B. `Na,Li`C. `W,Mo`D. `Fe,Ru` |
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Answer» Correct Answer - A |
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| 78. |
The element or elements whose position is anomalous the periodic table isA. HydrogenB. OxygenC. CarbonD. Nitrogen |
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Answer» Correct Answer - D |
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| 79. |
Hydrides of which of the following Lattices are different from those of parent metalsA. `Ni`B. `Pd`C. `Ce, Ac`D. All |
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Answer» Correct Answer - D |
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| 80. |
Write two similarities of hydrogen with alkali metals.A. Natuer of oxideB. Valence electronsC. Electro negative natuerD. Reducing character |
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Answer» Correct Answer - C |
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| 81. |
Which of the following is suitable and comfortable combination for the production of heavy hydrogen peroxide in the laboratoryA. Ice cold 50% `H_(2)SO_(4)`.B. Prolonged electrolysis of alkaline waterC. `K_(2)S_(2)O_(8)+2H_(2)O.`D. `K_(2)S_(2)O_(8)+2D_(2)O` |
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Answer» Correct Answer - C |
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| 82. |
Deuterium is heavy hydrogen, which is used inA. Artificial transmutation of elementsB. In nuclear reactors as a moderatorC. As a tractor in chemical engineeringD. As a radioactive isotype of hydrogen used for dating |
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Answer» Correct Answer - A::B::C |
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| 83. |
Which property is lower for deuterium than hydrogen?A. Latent heat of vapourisationB. Latent heat of fusionC. ReactivityD. Atomic weight |
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Answer» Correct Answer - C |
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| 84. |
In which property listed below hydrogen does not resemble alkali metals ?A. Tendency to form cationB. Nature to oxideC. Combination with halogensD. Reducing character |
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Answer» Correct Answer - B |
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| 85. |
Hydrogen resembles halogens in many respects for which several factors are responsible. Of the following factors which one is most important in this respect ?A. It contains one electron only in valency shellB. It is short of one electron to get inert gas configurationC. It is a diatomic gas like all halogensD. It exhibits colro like halogens |
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Answer» Correct Answer - D |
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| 86. |
Hydrogen peroxide can be prepared by the action of dil. `H_(2)SO_(4)` or `H_(3)PO_(4)` on barium peroxide or by bubbling carbon dioxide through a thin paste of barium peroxide. On an industrial scale , it can be prepared by hydrolysis of peroxodisulphuric acid obtained by electrolysis of 50% `H_(2)SO_(4)` or an equimolar mixture of `H_(2)SO_(4)` and ammonium sulphate .The strength of `H_(2)O_(2)` solution can be expressed in a number ways namely normality , molarity , percentage strength and volume of `O_(2)` produced at N.T.P by decomposition of 1 mL of `H_(2)O_(2)` acts as an oxidising as well a reducing agent both in acidic and basic media. What will be the volume of oxygen at NTP liberated upon the complete decomposition of 100 mL of the 2M `H_(2)O_(2)` solution?A. 2.24 LB. 22.4 LC. 44.8 LD. 11.2 L |
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Answer» Correct Answer - A |
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| 87. |
Hydrogen peroxide can be prepared by the action of dil. `H_(2)SO_(4)` or `H_(3)PO_(4)` on barium peroxide or by bubbling carbon dioxide through a thin paste of barium peroxide. On an industrial scale , it can be prepared by hydrolysis of peroxodisulphuric acid obtained by electrolysis of 50% `H_(2)SO_(4)` or an equimolar mixture of `H_(2)SO_(4)` and ammonium sulphate .The strength of `H_(2)O_(2)` solution can be expressed in a number ways namely normality , molarity , percentage strength and volume of `O_(2)` produced at N.T.P by decomposition of 1 mL of `H_(2)O_(2)` acts as an oxidising as well a reducing agent both in acidic and basic media. Hydrogen peroxide is used asA. An oxidant onlyB. A reductant onlyC. An acid onlyD. An oxidant , a reductant and an acid |
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Answer» Correct Answer - D |
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| 88. |
What is the strength in `g` per litre of a solution of `H_(2)SO_(4), 12 mL` of which neutralized `15 mL` of `N//10 NaOH` solution? |
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Answer» Correct Answer - B |
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| 89. |
When `H_(2)O_(2)` is added to acidified ferrous sulphate solutionA. Electrons are gained by `Fe^(2+)`B. Electrons are lost by `Fe^(2+)`C. No loss (or) gain of electronsD. Iron hydroxide is precipitated |
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Answer» Correct Answer - B |
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| 90. |
A compound C is produced on an industrial scale bt oxidation of 2-ethylanthraquinol by air. Compound C decolourises an acidic solutio of `KMnO_(4)` with the evolution of `O_(2)` Compound C produces a brown precipitate when it reacts with `MnSO_(4)` in alkaline solution. In idustrial preparation of compound C,2-ethyl anthraquinone is also produced which can be converted back 2-tehyl anthraquinol byA. Addintion of strong acidB. Addition of strong baseC. Catalytic oxidationD. Catalytic reduction suninh `H_(2)//Pd` |
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Answer» Correct Answer - D |
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| 91. |
A compound C is produced on an industrial scale bt oxidation of 2-ethylanthraquinol by air. Compound C decolourises an acidic solutio of `KMnO_(4)` with the evolution of `O_(2)` Compound C produces a brown precipitate when it reacts with `MnSO_(4)` in alkaline solution. Compound C reacts with `K_(2)Cr_(2)O_(7)` in acidic solution in presence of an organic sovent impart__colour to the orgaanic phaseA. orangeB. yellowC. blueD. green |
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Answer» Correct Answer - C |
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| 92. |
In the reaction. `H_(2)S+H_(2)O_(2) rarr S+2H_(2)O`A. `H_(2)S` is an acid and `H_(2)O_(2)` is a baseB. `H_(2)S` is an base and `H_(2)O_(2)` is a acidC. `H_(2)S` is an oxidizing agent and `H_(2)O_(2)` is a reaucing agentD. `H_(2)S` is an reducing agent and `H_(2)O_(2)` is an oxidizing agent |
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Answer» Correct Answer - D |
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| 93. |
100 " mL of " 0.01 M `KMnO_(4)` oxidised 100 mL `H_(2)O_(2)` in acidic medium. The volume of same `KMnO_(4)` required in strong alkaline medium to oxidise 100 " mL of " same `H_(2)O_(2)` will be: |
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Answer» Correct Answer - C |
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| 94. |
Which of the following is oxidized by `H_(2)O_(2)` in the alkaline mediumA. HCHOB. Mn(II)saltsC. Cr(III) saltsD. All of these |
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Answer» Correct Answer - D |
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| 95. |
The physical constants which are less for `D_(2)O ` than `H_(2)O` areA. Freezing point and Boiling pointB. Density and viscosityC. Solvating ability and dielectric constantD. Temperature of maximum density |
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Answer» Correct Answer - C |
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| 96. |
When `SO_(3)` is treated with `D_(2)O`, the products are :A. `D_(2)SO_(4)`B. `D_(2)SO_(3)`C. `D_(2)&H_(2)SO_(4)`D. `D_(2)SO_(5)` |
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Answer» Correct Answer - A |
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| 97. |
The boiling point of `D_(2)O` is greater than `H_(2)O_(2)` It is becauseA. `D_(2)O` has lower Kw valueB. `D_(2)O` has a lower dielectric constantC. `D_(2)O` is a associated liquidD. Inter molecular H-bonds are stronger in `D_(2)O` than in `H_(2)O_(2)` |
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Answer» Correct Answer - D |
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| 98. |
`NaOH+D_(2)OrarrNaOD+HDO` is known asA. Exchange reactionB. Deuterolysis reactionC. Hydrolysis reactionD. Softening reaction |
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Answer» Correct Answer - A |
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| 99. |
The lightest element in the periodic table isA. LithiumB. FluorineC. HydrogenD. Helium |
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Answer» Correct Answer - B |
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| 100. |
`3.4 g` sample of `H_(2)O_(2)` solution containing `x% H_(2)O_(2)` by weight requires `x mL of a KMnO_(4)` solution for complete oxidation under acidic condition. The normality of `KMnO_(4)` solution is |
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Answer» Correct Answer - A |
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