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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. |
Which of the following statement (s) is `//` are not correctA. The blue colour of aqueous `CuCl_(2)` is due to `[Cu(H_(2)O)_(4)]^(2+)`B. The yellow colour of aqueous `CuCl_(2)` is due to `[CuCl_(4)]^(2-)`C. The green colour of aqueous `CuCl_(2)` is due to the presence of both `[Cu(H_(2)O)_(4)]^(+)` and `[CuCl_(4)]^(1-)`D. The blue colour of aqueous `CuCl_(2)` is due to `[CuCl_(4)]^(3-)` |
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Answer» Correct Answer - C,D `[CuCl_(4)]^(2-)` has green color. |
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| 52. |
Solution of `MnO_(4)^(-)` is purple `-` coloured due toA. `d-d-` transitionB. charge transfer from O to MnC. due to both `d-d-` transition and charge transferD. none of these |
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Answer» Correct Answer - B Due to charge transfer from Ligand (o) to Metal (Mn) |
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| 53. |
When silver nitrate is reacted with excess of `I_(2)` in aqueous solution then which of the following compounds are formed ?A. `AgIO_(3)`B. `AgI`C. `HIO_(3)`D. `HNO_(3)` |
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Answer» Correct Answer - B,C,D `AgNO_(3)+underset(("Excess"))(I_(2(aq)))rarrAgI+HIO_(3)+HNO_(3)` |
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| 54. |
The precipitate obtained by adding lead nitrate solution to a sodium carbonate solution isA. `Pb(OH)_(2)`B. `PbCO_(3)`C. `PbCO_(3).Pb(OH)_(2)`D. `PbO_(2)` |
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Answer» Correct Answer - C Hydroxy carbonate is precipitated. To get pure `PbCO_(3),NaHCO_(3)` should be used. |
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| 55. |
Match the reactions in Column I with nature of the reactions `//` type of the products in Column II. A. `AgNO_(3)(aq)+I_(2)("excess")+H_(2)Orarr" "(p)"Disproportionation"`B. `K_(2)MnO_(4)(aq)+CO_(2)(g)rarr" "(p)"Comproportionation"`C. `Na_(2)Cr_(2)O_(7)+C overset(Delta)(rarr)" "(r ) "Redox reaction"`D. `CuCl_(2)(aq)+Cu(s)rarr" "(s)"One of the products is insoluble in water"` |
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Answer» Correct Answer - A::B::C::D `(A) 5AgNO_(3)(aq)+3overset(0)I_(2)("excess")+3H_(2)O rarr overset(+V)(HlO_(3))+overset(-1)(5Agl)+5HNO_(3)` disproportionation reaction. AgI insoluble in water. Redox reaction. `(B) 3K_(2)overset(+VI)(MnO_(4))(aq)+2CO_(2)(g)rarroverset(+VII)(2KMnO_(4))+overset(+VI)(MnO_(2))+2K_(2)CO_(3)` disproportionation reaction. `MnO_(2)` insoluble in water. Redox reaction. `(C ) 2 overset(0)(C)+overset(+VI)(Na_(2)Cr_(2)O_(7))overset(Delta)(rarr)overset(+III)(Cr_(2)O_(3))+overset(+IV)(Na_(2)CO_(3))+overset(+II)(CO)uarr` Redox reaction. `Cr_(2)O_(3)` ( green pigment) insoluble in water. |
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| 56. |
On heating `ZnCl_(2).2H_(2)O`, the compounds obtained isA. `ZnCl_(2)`B. `Zn(OH)Cl`C. `Zn(OH)_(2)`D. `ZnO` |
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Answer» Correct Answer - B `Zncl_(2).2H_(2)Ooverset(Delta)(rarr)Zn(OH)Cl+HCl+H_(2)O` |
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| 57. |
Complete the following reaction: `SnCl_(4)+C_(2)H_(5)Cl+Na to`A. `(C_(2)H_(5))_(4)Sn`B. `SnCl_(2)`C. `C_(2)H__(5)-O-C_(2)H_(5)`D. `SnO_(2)` |
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Answer» Correct Answer - A `SnCl_(4)+C_(2)H_(5)Cl+Naoverset(Delta)(rarr)(C_(2)H_(5))_(4)Sn` |
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| 58. |
When `SnCl_(2)` reacts with `HgCl_(2)`, the product formed are `:`A. `Sn+HgCl_(4)`B. `Sn+Cl_(2)+HgCl`C. `SnCl_(4)` and `Hg`D. None of these |
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Answer» Correct Answer - C `SnCl_(2)+2HgCl_(2)rarrSnCl_(4)+Hg_(2)Cl_(2)` `SnCl_(4)+Hg_(2)Cl_(2)rarrSnCl_(4)+2Hg` |
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| 59. |
Purple of Cassius is obtained by the addition of `SnCl_(2)` solution to a solution ofA. `CuCl_(2)`B. `HgCl_(2)`C. `Hg_(2)Cl_(2)`D. `AuCl_(3)` |
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Answer» Correct Answer - D `2Au^(3+)+3Sn^(2+)rarr2Au+3Sn^(4+)`. Au is adsorbed over `Sn(OH)_(4)` formed giving purple of Cassius. |
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| 60. |
The compound used in the quanlitative and quantitative analysis of carbon and hydrogen in the organic compound isA. `ZnO`B. FeOC. `Fe_(2)O_(3)`D. CuO |
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Answer» Correct Answer - D Organic compound is heated with CuO. |
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| 61. |
The metal oxide which decomposes on heating is `//` are `:`A. ZnOB. `Al_(2)O_(3)`C. `Ag_(2)O`D. `AgO` |
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Answer» Correct Answer - C,D Silver oxides on heating decomposes. |
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| 62. |
During estimation of oxalic acid Vs `KMnO_(4)`, self indicator isA. `KMnO_(4)`B. oxalic acidC. `K_(2)SO_(4)`D. `MnSO_(4)` |
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Answer» Correct Answer - A `KMnO_(4)` itself acts as self indicator |
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| 63. |
Transition metals usually from coloured complexes and d-d transitions `(t_(2g)hArre_(g))` are responsible for colour as the energy difference between `t_(2g)` and `e_(g)` lies in visible region. But all the coloured ions are not dut to d-d transition but charge transfer bands also play important roles. Charge transfer bands may be of two types. (i) ligand to metal (CTLM)`" "(ii)` metal to ligand (CTML). Charge transfer transition always produces intense colour as compared to d-d transition. Select the incorrect statement `:`A. d- block metal ions are usually colouredB. Colour of d- block metal ions is generally due to d-d transitionC. All the complexes of Cu^(+)` are colourless on account of diamagnetic nature `(d^(10)` configuration ).D. `CrO_(3)` is bright orange due to CTLM. |
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Answer» Correct Answer - C Conceptual |
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| 64. |
Among the following the colour less compound (s) is `//` areA. CuClB. `K_(3)[Cu(CN)_(4)]`C. `CuF_(2)`D. `[Cu(CH_(3)CN)_(4)]BF_(3)` |
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Answer» Correct Answer - A,B,D `Cu^(2+)` has `d^(9)` configuration |
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| 65. |
`Cr_(2)O_(7)^(2-)+xH^(+)+yI^(-)rarr 2Cr^(3+)+I_(2)+H_(2)O` Balance the eequation.`(x-y)` is |
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Answer» Correct Answer - 8 `Cr_(2)O_(7)^(2-)+14H^(+)+6I^(-)rarr2Cr^(3+)+3I_(2)+7H_(2)O` |
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| 66. |
Acidified chromic acid `+H_(2)O_(2)rarr underset(("blue colour"))(X+Y)`, X and Y areA. `CrO_(5)` and `H_(2)O`B. `Cr_(2)O_(3)` and `H_(2)O`C. `CrO_(2)` and `H_(2)O`D. `CrO` and `H_(2)O` |
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Answer» Correct Answer - A `H_(2)CrO_(4)+H_(2)O_(2)rarrCrO_(5)+H_(2)O` |
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| 67. |
Match the following `:` Indicate the color produced in the following reactions. Shade the color code . |
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Answer» Correct Answer - `Ararr1; B rarr 2,C rarr 4, D rarr 2` Conceptual |
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| 68. |
Which of the following give characteristics color reaction with `H_(2)O_(2)` in acidic medium ?A. `K_(2)Cr_(2)O_(7)`B. `Ti(SO_(4))_(2)`C. `VSO_(4)`D. `CuSO_(4)` |
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Answer» Correct Answer - A,B,C `A:` Blue, B`:` Orange red C `:` yellow |
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| 69. |
Give the correct order of initials T of F for following statements. Use T if statements is true and F if it is false. `I)` Sulphide reacts with `Na_(2)[Fe(CN)_(5)(NO)]` to form a purple coloured compound `Na_(4)[Fe(CN)_(5)(NOS)]` . In the reaction, the oxidation state of iron changes. `II) Pt(IV)` compounds are relatively more stable than `Ni(IV)` compounds `III)` The welding of magnesium can be done in the atmosphere of Helium. `IV) LiAlH_(2)` on hydrolysis will give `H_(2)`A. F F T TB. F T T TC. T F T FD. T F T T |
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Answer» Correct Answer - B Conceptual |
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| 70. |
1 mole of `Fe^(2+)` ions are oxidised to `Fe^(3+)` ions with the help of ( in acidic medium)A. `1//5` moles of `KMnO_(4)`B. `5//3` moles of `KMnO_(4)`C. `2//5` moles of `KMnO_(4)`D. `5//2` moles of `KMnO_(4)` |
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Answer» Correct Answer - A `underset((aq))(10FeSO_(4))+underset((aq))(2KMnO_(4))+underset((aq))(2K_(2)SO_(4))+8H_(2)O` |
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| 71. |
The products formed when red lead is heated with carbonA. `PbCO_(3),CO`B. `PbCO_(3),Pb(OH)_(2)`C. `Pb,CO`D. `PbCO_(3),CO_(2)` |
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Answer» Correct Answer - C `Pb_(3)O_(4)+Coverset(Delta)(rarr)Pb+CO""` |
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| 72. |
Strongest oxidising agent isA. `PbO_(2)`B. `PbO`C. `Pb_(3)O_(4)`D. White lead |
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Answer» Correct Answer - A `Pb^(+VI)` is good oxidising agent |
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| 73. |
Which of the following gives chromyl chloride test?A. `SnCl_(2)`B. `NaCl`C. `PbCl_(2)`D. `AgCl` |
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Answer» Correct Answer - B Chronyl chloride test for only free chloride ions `(Cl^(-))` |
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| 74. |
Which among the following is a hydrated salt?A. `SnCl_(2).2H_(2)O`B. `Na_(2)SO_(4).10H_(2)O`C. `Na_(2)CO_(3).10H_(2)O`D. `Na_(2)SO_(4).8H_(2)O` |
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Answer» Correct Answer - A `SnCl_(2).2H_(2)O` on heating undergo hydrolysis form `Sn(OH)Cl` and finally tin oxide but not chloride |
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| 75. |
Which of the following give a precipitate when added to a NaCl solution ?A. `AgNO_(3)`B. `Hg(NO_(3))_(2)`C. `Hg_(2)(NO_(3))_(2)`D. `Pb(NO_(3))_(2)` |
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Answer» Correct Answer - A,C,D `HgCl_(2)` is soluble in water. |
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| 76. |
Which of the following does not give a precipitate with alcoholic `AgNO_(3)` ?A. `CrO_(4)^(2-)`B. `Cl^(-)`C. `SCN^(-)`D. `ClO_(4)^(-)` |
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Answer» Correct Answer - D Others give precipitate. `AgClO_(4)` is soluble in water. |
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| 77. |
Photography is based on the nature of silver halides. Except AgF, the silver halides are photosensitive. These undergo decomposition in light and turn black due to formation of free silver. `2AgBroverset(light)to2Ag+Br_2` The photography films are prepared by adding `20%` aqueous solution of `AgNO_3` to `NH_4Br` solution containing gelatic. When such a film is exposed, emulsion gets affected and a latent image is formed on the film. When this exposed film or plate is dipped ina developer which contains a reducing agent, the part affected most during exposure are reduced to the maximum. The image becomes visible. It is called a negative. The remaining sensitive emulsion on the negative is removed by dissolving it in hypo solution (fixer). Fihnally, a positive of the nagative already prepared is made on silver bromide paper. Q. The solution of the developer consists ofA. alkaline solution of pyrogallolB. alkaline solution of quinolC. either (A) or (B)D. neither (A) nor (B) |
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Answer» Correct Answer - C Conceptual |
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| 78. |
Photography is based on the nature of silver halides. Except AgF, the silver halides are photosensitive. These undergo decomposition in light and turn black due to formation of free silver. `2AgBroverset(light)to2Ag+Br_2` The photography films are prepared by adding `20%` aqueous solution of `AgNO_3` to `NH_4Br` solution containing gelatic. When such a film is exposed, emulsion gets affected and a latent image is formed on the film. When this exposed film or plate is dipped ina developer which contains a reducing agent, the part affected most during exposure are reduced to the maximum. The image becomes visible. It is called a negative. The remaining sensitive emulsion on the negative is removed by dissolving it in hypo solution (fixer). Fihnally, a positive of the nagative already prepared is made on silver bromide paper. Q. Silver halides are used in photographgy because these compoundsA. are insoluble in waterB. are affected by lightC. are soluble in ammonia solutionD. easily stick on the surface of photographic plate or film |
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Answer» Correct Answer - B Conceptual |
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| 79. |
Photography is based on the nature of silver halides. Except AgF, the silver halides are photosensitive. These undergo decomposition in light and turn black due to formation of free silver. `2AgBroverset(light)to2Ag+Br_2` The photography films are prepared by adding `20%` aqueous solution of `AgNO_3` to `NH_4Br` solution containing gelatin. When such a film is exposed, emulsion gets affected and a latent image is formed on the film. When this exposed film or plate is dipped in a developer which contains a reducing agent, the part affected most during exposure are reduced to the maximum. The image becomes visible. It is called a negative. The remaining sensitive emulsion on the negative is removed by dissolving it in hypo solution (fixer). Finally, a positive of the negative already prepared is made on silver bromide paper. Q. The compound formed on the unexposed photographic film or plate isA. silver nitrateB. ammonium bromideC. diamminesilver bromideD. silver bromide |
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Answer» Correct Answer - D Conceptual |
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| 80. |
Which one of the following is used as an eye lotion ?A. `AgNO_(3)`B. `CuSO_(4)`C. `ZnSO_(4)`D. `FeSO_(4)` |
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Answer» Correct Answer - C `4Zn+10HNO_(3)("v. dil")rarr4Zn(NO_(3))_(2)+NH_(4)NO_(3)+3H_(2)O` |
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| 81. |
Match the following `:` |
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Answer» Correct Answer - A::B::C::D Conceptual |
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| 82. |
Match the following `:` Choose the correct answer `:` |
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Answer» Correct Answer - 1 Conceptual |
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| 83. |
Match the following `:` |
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Answer» Correct Answer - `Ararrr;,Brarrp,r:Crarrq:Drarrs,t` Conceptual |
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| 84. |
Match the following `:` |
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Answer» Correct Answer - `A rarr p,q,s,t;Brarr p,q,s,t; Crarr p,r,t; D rarr p,q,s,t` Conceptual |
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| 85. |
Match the following `:` |
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Answer» Correct Answer - `A rarrp,q;Brarrq,r,t;Crarr r,t;Drarr r,s` Conceptual |
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| 86. |
Match the following `:` |
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Answer» Correct Answer - `Ararrp,r,s;Brarr q,t; C rarr r,s,t;Drarr r,s,t` Conceptual |
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| 87. |
Which one of the following anions will give a white precipitate with `Pb(NO_(3))_(2)` solution ?A. `S^(2-)`B. `Cl^(-)`C. `CrO_(4)^(2-)`D. `I^(-)` |
| Answer» `PbCl_(2)` is white , others are colored. | |
| 88. |
Which of the following is not formed when `FeC_(2)O_(4)` heated in the absence of airA. FeOB. `O_(2)`C. COD. `CO_(2)` |
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Answer» Correct Answer - B `FeC_(2)O_(4)overset(Delta)(rarr)FeO(s)+CO_(2)(g)+CO(g)` |
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| 89. |
The oxidation state of chromium in the final product formed by the reaction between Kl and acidified potassium dichromate solution is `:` |
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Answer» Correct Answer - A `(a) Cr_(2)O_(7)^(2-)+6I^(_)+14H^(+)rarr3I_(2)+7H_(2)O+2Cr^(3+)` oxidation state of Cr is `3+` |
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| 90. |
Which of the following coinage metal is `//` are dissolved in conc. `HNO_(3)` ?A. Copper ( Cu)B. Silver (Ag)C. Gold (Au)D. Zinc (Zn) |
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Answer» Correct Answer - A,B,C `Cu,Ag,Au` are dissolved in Conc. `HNO_(3)` |
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| 91. |
Which one of the following is used in skin ointments ?A. `ZnO`B. `CuO`C. `FeO`D. `Fe_(2)O_(3)` |
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Answer» Correct Answer - A `4K_(2)Cr_(2)O_(7)overset("heat")(rarr)4K_(2)CrO_(4)+2Cr_(2)O_(3)+3O_(2)` |
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| 92. |
When excess of `SnCl_(2)` is added to a solution of `HgCl_(2)`, a white precipitate turning to gray is obtained. The grey colour is due toA. `Hg_(20Cl_(2)`B. `SnCl_(4)`C. SnD. Hg |
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Answer» Correct Answer - D `SnCl_(2)+underset(("Excess"))(HgCl_(2))rarrunderset(("grey""))(Hg)+SnCl_(4)` |
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| 93. |
Copper is the most noble of the first row transition metals and occurs in small deposits in several countries. Ors of copper include chalcanthite `(CuSO_(4).5H_(2)O)` , atacamite `(Cu_(2)Cl(OH)_(3))`, cuprite `(Cu_(2)O)`, copper glance `(Cu_(2)S)` and malachite `(Cu_(2)(OH)_(2)CO_(3))`. However , `80%` of the world copper production comes from the ore chalcopyrite `(CuFeS_(2))`. the extraction of copper from chalcopyrite involves partial roasting, removla of iron and self- reduction. Partial roasting of chalcopyrite producesA. `Cu_(2)S` and `FeO`B. `Cu_(2)O` and `FeO`C. `CuS` and `Fe_(2)O_(3)`D. `Cu_(2)O` and `Fe_(2)O_(3)` |
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Answer» Correct Answer - B `2CuFeS_(2)+O_(2)rarrCu_(2)S +SO_(2)uarr +2FeS` `2FeS+3O_(*2)rarr 2FeO+2SO_(2)uarr` `2Cu_(2)S+3O_(2)rarr2Cu_(2)O+2SO_(2)uarr` |
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| 94. |
How many of the following can be oxidized by acid `KMnO_(4)` solution ? `(1) Fe^(2+)` (2) `Ni^(2+)` (3) `Zn^(2+)` (4) `Sn^(2+)` |
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Answer» Correct Answer - 3 `1,4,5.` Oxidized to `Fe^(3+),Co^(3+),Sn^(4+)` |
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| 95. |
Pyrolusite ore on oxidation with `KCIO_(3)//KNO_(3)` in basic medium produces dark green coloured compound `(A)`, which on electrolysis produces a purple coloured compound `(B)`. The purple coloured rhombic prisms. It shows different reactions in different mediums. Excess of compounds (B) on heating with conc. `H_(2)SO_(4)` gives an explosive oil (C ), which on heating decomposes to gives another compound (D ) along with oxygen. On passing `CO_(2)` in the solution of (A), a purple coloured solution along with brown ppt is observed.A. disproportion reaction where oxidation no. changes from `+6` to `+7,+4`.B. comproportionation reaction in where oxidation no. changes from `+3` to `+2`.C. both (i) and (ii)D. none |
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Answer» Correct Answer - A Conceptual |
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| 96. |
Pyrolusite ore on oxidation with `KCIO_(3)//KNO_(3)` in basic medium produces dark green coloured compound `(A)`, which on electrolysis produces a purple coloured compound `(B)`. The purple coloured rhombic prisms. It shows different reactions in different mediums. Excess of compounds (B) on heating with conc. `H_(2)SO_(4)` gives an explosive oil (C ), which on heating decomposes to gives another compound (D ) along with oxygen. The nature of compound (C ) is `:`A. basicB. acidicC. neutralD. amphoteric |
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Answer» Correct Answer - B Conceptual |
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| 97. |
Pyrolusite ore on oxidation with `KCIO_(3)//KNO_(3)` in basic medium produces dark green coloured compound `(A)`, which on electrolysis produces a purple coloured compound `(B)`. The purple coloured rhombic prisms. It shows different reactions in different mediums. Excess of compounds (B) on heating with conc. `H_(2)SO_(4)` gives an explosive oil (C ), which on heating decomposes to gives another compound (D ) along with oxygen. Red coloured oxide (M) whose cation has pseudo inert electronic configuration reacts with compound (B) in acidic medium gives another oxide (N) which is black in colour. When sulphate of its metal is reacted with `K_(4)[Fe(CN)_(6)` it produces chocolate brown ppt. Select the correct statement.A. The chocolate brown ppt formed is `Cu_(2)[Fe(CN)_(6)]`B. the red coloured oxide is `Cu_(2)O`C. the black coloured oxide is `CuO`D. All of these |
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Answer» Correct Answer - D Conceptual |
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| 98. |
Pyrolusite ore on oxidation with `KCIO_(3)//KNO_(3)` in basic medium produces dark green coloured compound `(A)`, which on electrolysis produces a purple coloured compound `(B)`. The purple coloured rhombic prisms. It shows different reactions in different mediums. Excess of compounds (B) on heating with conc. `H_(2)SO_(4)` gives an explosive oil (C ), which on heating decomposes to gives another compound (D ) along with oxygen. When (D) reacts with `PbO_(2)//HNO_(3)` it produces a purple`//` pink coloured compound (E). Identify (E)A. `NaMnO_(4)`B. `Mn(OH)_(2)`C. `HMnO_(4)`D. `Na_(2)MnO_(4)` |
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Answer» Correct Answer - C Conceptual |
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| 99. |
Pyrolusite ore on oxidation with `KCIO_(3)//KNO_(3)` in basic medium produces dark green coloured compound `(A)`, which on electrolysis produces a purple coloured compound `(B)`. The purple coloured rhombic prisms. It shows different reactions in different mediums. Excess of compounds (B) on heating with conc. `H_(2)SO_(4)` gives an explosive oil (C ), which on heating decomposes to gives another compound (D ) along with oxygen. Identify (D).A. `Mn_(2)O_(7)`B. `MnO_(2)`C. `MnSO_(4)`D. `Mn_(2)O_(3)` |
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Answer» Correct Answer - B Conceptual |
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| 100. |
The species that undergoes disproportionational is an alkaline medium areA. `Cl_(2)`B. `MnO_(4)^(2-)`C. `NO_(2)`D. `ClO_(4)^(-)` |
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Answer» Correct Answer - A,B,C `Cl_(2)+2OH^(-)rarrCl^(-)+OCl^(-)` `2NO_(2)+2NaOHrarrNaNO_(2)+NaNO_(3)+H_(2)O` `MnO_(4)^(2-)+OH^(-)rarrMnO_(4)^(-)+Mn^(+2)` |
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