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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. |
Oxygen gas can be prepared from solid `KMnO_4` byA. Treating the solid with `H_(2)` gas.B. Strongly heating the solid.C. Dissolving the solid in dil. `H_(2)SO_(4)`D. Dissolving solid in dil HCl. |
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Answer» Correct Answer - B |
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| 52. |
The correct order of O - O bond length in `O_(2)H_(2)O_(2)` and `O_(3)` isA. `O_(2)gtO_(3)gtH_(2)O_(2)`B. `O_(2)gtH_(2)O_(2)gtO_(3)`C. `O_(3)gtH_(2)O_(2)gtO_(2)`D. `H_(2)O_(2)gtO_(3)gtO_(2)` |
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Answer» Correct Answer - D |
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| 53. |
Which is not a reducing agent?A. `Na_(2)S_(2)O_(3)`B. `Na_(2)SO_(3)`C. `Na_(2)S`D. `K_(2)S_(2)O_(8)` |
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Answer» Correct Answer - D |
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| 54. |
`SO_(2)` acts as ,A. bleaching agentB. Oxidising agentC. reducing agentD. All of the above |
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Answer» Correct Answer - D |
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| 55. |
The binary compounds of oxygen with other elements are called oxides. They are classified depending either upon their acid-base characteristics or on the basis of oxygen content. (a) Normal oxides : These oxides which contain oxygen atom as permitted by the normal oxidation number, i.e., `-2` normal oxide may be acidic, basic, amphoteric or neutral. (b) Polyoxides : The oxides which contain oxygen atoms different than those permitted by the normal oxidation number of `-2`. (i) Peroxides : Two oxygen atoms are linked to each other and oxyegen has `-1` oxidation number. They contain `(O -O)^(2-)` unit. (ii) Superoxodes : These oxides contain `(O-O)^(-1)` unit, i.e., each O-atom has oxidation number `-1//2`. (c) Suboxides : These contain low content of oxygen than expected. (d) Mixed oxides : These oxides are made of two simpler oxides. Which of the following pairs contains amphoteric oxides ?A. BeO, BaOB. `BeO,Al_(2)O_(3)`C. `Al_(2)O_(3),P_(2)O_(5)`D. `FeO, CuO` |
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Answer» Correct Answer - B |
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| 56. |
Select the correct statements about oxygen molecule.A. It is paramagneticB. It is bond order is twoC. In liquid state it is blue colouredD. All the above |
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Answer» Correct Answer - D |
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| 57. |
The binary compounds of oxygen with other elements are called oxides. They are classified depending either upon their acid-base characteristics or on the basis of oxygen content. (a) Normal oxides : These oxides which contain oxygen atom as permitted by the normal oxidation number, i.e., `-2` normal oxide may be acidic, basic, amphoteric or neutral. (b) Polyoxides : The oxides which contain oxygen atoms different than those permitted by the normal oxidation number of `-2`. (i) Peroxides : Two oxygen atoms are linked to each other and oxyegen has `-1` oxidation number. They contain `(O -O)^(2-)` unit. (ii) Superoxodes : These oxides contain `(O-O)^(-1)` unit, i.e., each O-atom has oxidation number `-1//2`. (c) Suboxides : These contain low content of oxygen than expected. (d) Mixed oxides : These oxides are made of two simpler oxides. Which of the following pairs contains mixed oxides ?A. `Pb_(3)O_(4),Fe_(3)O_(4)`B. `MnO_(2),BaO_(2)`C. `KO_(2),NaO_(2)`D. `Mn_(3)O_(4),N_(2)O_(5)` |
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Answer» Correct Answer - A |
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| 58. |
The binary compounds of oxygen with other elements are called oxides. They are classified depending either upon their acid-base characteristics or on the basis of oxygen content. (a) Normal oxides : These oxides which contain oxygen atom as permitted by the normal oxidation number, i.e., `-2` normal oxide may be acidic, basic, amphoteric or neutral. (b) Polyoxides : The oxides which contain oxygen atoms different than those permitted by the normal oxidation number of `-2`. (i) Peroxides : Two oxygen atoms are linked to each other and oxyegen has `-1` oxidation number. They contain `(O -O)^(2-)` unit. (ii) Superoxodes : These oxides contain `(O-O)^(-1)` unit, i.e., each O-atom has oxidation number `-1//2`. (c) Suboxides : These contain low content of oxygen than expected. (d) Mixed oxides : These oxides are made of two simpler oxides. Which of the following pairs contains neutral oxides ?A. `SO_(2),SO_(3)`B. `N_(2)O_(3), N_(2)O_(5)`C. CO,NOD. `Na_(2),CaO` |
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Answer» Correct Answer - C |
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| 59. |
The binary compounds of oxygen with other elements are called oxides. They are classified depending either upon their acid-base characteristics or on the basis of oxygen content. (a) Normal oxides : These oxides which contain oxygen atom as permitted by the normal oxidation number, i.e., `-2` normal oxide may be acidic, basic, amphoteric or neutral. (b) Polyoxides : The oxides which contain oxygen atoms different than those permitted by the normal oxidation number of `-2`. (i) Peroxides : Two oxygen atoms are linked to each other and oxyegen has `-1` oxidation number. They contain `(O -O)^(2-)` unit. (ii) Superoxodes : These oxides contain `(O-O)^(-1)` unit, i.e., each O-atom has oxidation number `-1//2`. (c) Suboxides : These contain low content of oxygen than expected. (d) Mixed oxides : These oxides are made of two simpler oxides. Which pair of species is referred to as suboxides ?A. CO, NOB. `SO_(2), CaO`C. `N_(2)O, CO`D. `N_(2)O, C_(3)O_(2)` |
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Answer» Correct Answer - D |
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| 60. |
The binary compounds of oxygen with other elements are called oxides. They are classified depending either upon their acid-base characteristics or on the basis of oxygen content. (a) Normal oxides : These oxides which contain oxygen atom as permitted by the normal oxidation number, i.e., `-2` normal oxide may be acidic, basic, amphoteric or neutral. (b) Polyoxides : The oxides which contain oxygen atoms different than those permitted by the normal oxidation number of `-2`. (i) Peroxides : Two oxygen atoms are linked to each other and oxyegen has `-1` oxidation number. They contain `(O -O)^(2-)` unit. (ii) Superoxodes : These oxides contain `(O-O)^(-1)` unit, i.e., each O-atom has oxidation number `-1//2`. (c) Suboxides : These contain low content of oxygen than expected. (d) Mixed oxides : These oxides are made of two simpler oxides. Which of the following oxides is paramagnetic in nature ?A. `KO_(2)`B. `BaO_(2)`C. `H_(2)O`D. `CO_(2)` |
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Answer» Correct Answer - A |
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| 61. |
The correct statement(s) about `O_(3)` is/areA. O - O bond lengths are equalB. `O_(3)` is diamagnetic in natureC. `O_(3)` has bent structureD. All |
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Answer» Correct Answer - D |
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| 62. |
Which of the following is most easily hydrolysed?A. `SF_(6)`B. `NF_(3)`C. `CCl_(4)`D. `TeF_(6)` |
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Answer» Correct Answer - D |
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| 63. |
Sodium thiosulphate is prepared byA. boiling `Na_(2)SO_(3)` solution with elemental sulphur in alkaline mediumB. boiling `Na_(2)SO_(3)` solution with elemental sulphur in acidic mediumC. oxidation of `Na_(2)S_(5)` with airD. heating sulphur with NaOH |
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Answer» Correct Answer - A::C::D |
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| 64. |
Peroxide linkage is present inA. `MnO_(2)`B. `CrO_(5)`C. `H_(2)SO_(5)`D. `BaO_(2)` |
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Answer» Correct Answer - B::C::D |
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| 65. |
Which of the following will not be oxidised by `O_(3)` ?A. `K_(2)MnO_(4)`B. `Fe_(2)(SO_(4))_(3)`C. `KMnO_(4)`D. `K_(2)Cr_(2)O_(7)` |
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Answer» Correct Answer - B::C::D |
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| 66. |
Which of the following does not give hydrogen peroxide on hydrolysis?A. `H_(2)S_(2)O_(3)`B. `H_(2)SO_(5)`C. `H_(2)S_(2)O_(7)`D. `H_(2)S_(4)O_(6)` |
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Answer» Correct Answer - A::C::D |
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| 67. |
Which of the following statements regarding the manufacture of `H_(2)SO_(4)` by contact process is not true.A. Sulphur is burnt in air to form `SO_(2)`B. `SO_(2)` is catalytically oxidised to `SO_(3)`C. `SO_(3)` is dissolved in water to get 100% sulphuric acidD. `H_(2)SO_(4)` obtained by contact process is of higher purity than obtained by lead chamber process. |
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Answer» Correct Answer - C |
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| 68. |
`SO_(2)` gas can be identified by exposing it to theA. Glass rod dippend in conc HClB. Filter paper dipped in acidified `K_(2)Cr_(2)O_(7)`C. Filter paper dipped in lead acetate solutionD. Glass rod dippend in `NH_(4)OH` |
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Answer» Correct Answer - B |
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| 69. |
Which of the following statements regarding sulphur dioxide is not true?A. `SO_(2)` is an angular moleculeB. `SO_(2)` may be regarded as the resonance hybrid of two canonical structuresC. `SO_(2)` is anhydride of sulphuric acidD. `SO_(2)` is anhydride of sulphurous acid |
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Answer» Correct Answer - C |
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| 70. |
When `H_(2)S` gas is passed into aqueous sulphur dioxideA. `H_(2)S` is only converted into yellow precipitate of sulphurB. `SO_(2)` is only converted into yellow precipitate of sulphurC. A clear solution of `H_(2)SO_(4)` is formedD. `SO_(2)` as well `H_(2)S` are converted into yellow precipitate of sulphur |
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Answer» Correct Answer - D |
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| 71. |
The correct set of oxidation numbers of sulphur atoms in `H_(2)S_(2)O_(3)` is/are:A. `+6,-2`B. `+4,-2`C. `+2,+4`D. `+5,-1` |
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Answer» Correct Answer - A |
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| 72. |
One gas bleaches the colour of flowers by reduction and other by oxidation. These gases areA. CO and `CO_(2)`B. `H_(2)S` and `Br_(2)`C. `SO_(2)` and `Cl_(2)`D. `NH_(3)` and `SO_(3)` |
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Answer» Correct Answer - C |
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| 73. |
Oxidizing agent used in the manufacture of `KMnO_(4)` isA. `O_(3)`B. `O_(2)`C. `Cl_(2)`D. `Ag_(2)O` |
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Answer» Correct Answer - A |
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| 74. |
Which of the following acids have sulphur - sulphur bond?A. dithionic acidB. pyrosulphuric acidC. peroxymonosulphuric acidD. peroxodisulphuric acid |
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Answer» Correct Answer - A |
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| 75. |
Concentrated sulphuric acid is notA. efflorescentB. hygroscopicC. oxidising agentD. sulphonating agent |
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Answer» Correct Answer - A |
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| 76. |
Assertion: The O - O bond lengths in ozone molecule are intermediate between single and double bonds. Reason: `O_(3)` molecule is a resonance hybrid.A. Statement-I and Statement-II are correct and Statement-II is correct explanation of Statement-IB. Statement-I and Statement-II are correct and Statement-II is not correct explanation of Statement-IC. Statement-I is correct and Statement-II is not correctD. Statement-I is not correct and Statement-II is correct |
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Answer» Correct Answer - A |
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| 77. |
Statement-I : `H_(2)SO_(4)` has high viscosity and high b.pt Statement-II : `H_(2)SO_(4)` shows strong H-bondingA. Statement-I and Statement-II are correct and Statement-II is correct explanation of Statement-IB. Statement-I and Statement-II are correct and Statement-II is not correct explanation of Statement-IC. Statement-I is correct and Statement-II is not correctD. Statement-I is not correct and Statement-II is correct |
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Answer» Correct Answer - A |
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| 78. |
`SCl_(4)` on hydrolysis gives:A. `H_(2)SO_(3)`B. `H_(2)SO_(4)`C. `H_(2)S_(2)O_(7)`D. `H_(2)S_(2)O_(8)` |
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Answer» Correct Answer - A |
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| 79. |
Statement-I : Conc. `H_(2)SO_(4)` is low volatillity and viscos nature acid Statement-II : It is due to Hydrogen bondingA. Statement-I and Statement-II are correct and Statement-II is correct explanation of Statement-IB. Statement-I and Statement-II are correct and Statement-II is not correct explanation of Statement-IC. Statement-I is correct and Statement-II is not correctD. Statement-I is not correct and Statement-II is correct |
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Answer» Correct Answer - A |
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| 80. |
Which one of the following about `CH_(2)SF_(4)` and `SF_(4)SOF_(4), OCF_(2)` molecules is/are incorrect?A. Equitorial FSF bond angle in `SOF_(4)` will be less then in `SF_(4)` moleculeB. The two hydrogens, carbon, sulphur and two flourines of equatorial position in molecule `CH_(2)SF_(4)` will be lying in the same plane.C. The axial FSF bond angle in `SF_(4)~~180^(@)`D. The bond angle FCO will be `lt 120^(@)` in molecule `OCF_(2)` |
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Answer» Correct Answer - A::B |
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| 81. |
Statement-I : `SF_(4)` and `SeF_(4)` are used as fluorinating agent Statement-II : The conversion of `-COOH` to `-CF_(3),C=O` to `CF_(2)` and P = O to `PF_(2)` can be made by `SF_(4)` or `SeF_(4)`A. Statement-I and Statement-II are correct and Statement-II is correct explanation of Statement-IB. Statement-I and Statement-II are correct and Statement-II is not correct explanation of Statement-IC. Statement-I is correct and Statement-II is not correctD. Statement-I is not correct and Statement-II is correct |
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Answer» Correct Answer - C |
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| 82. |
Which of the following statements are incorrectA. `SO_(3)` is stronger oxidising agent and more acidic than `SO_(2)`B. Selenium forms only two oxoacids i.e., selenous acid `(H_(2)SeO_(3))` and selenic acid `(H_(2)SeO_(4))`C. The acidic strength and oxidation power of oxoaicds is greater in `+6` oxidation state than in `+4`.D. The reducing character of oxides of group 16 elements increases in the order `SO_(2)ltSeO_(2)ltTeO_(2)` |
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Answer» Correct Answer - D |
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| 83. |
Statement-I : Elements of oxygen family are not capable of forming `p pi-p pi` bonds with other elements of smaller size like C, N ets Statement-II : Only oxygen prossess this property of show multiple bondingA. Statement-I and Statement-II are correct and Statement-II is correct explanation of Statement-IB. Statement-I and Statement-II are correct and Statement-II is not correct explanation of Statement-IC. Statement-I is correct and Statement-II is not correctD. Statement-I is not correct and Statement-II is correct |
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Answer» Correct Answer - B |
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| 84. |
Conversion of `SO_(2)` to `SO_(3)` isA. Exothermic reactionB. Endothermic reactionC. Photochemical reactionD. Reduction reaction |
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Answer» Correct Answer - A |
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| 85. |
Which of the following is a red liquid?A. `SF_(4)`B. `SF_(6)`C. `SCl_(2)`D. `S_(2)Cl_(2)` |
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Answer» Correct Answer - C |
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| 86. |
The purity of `H_(2)SO_(4)` obtained by contact process isA. `96-98%`B. `92-96%`C. `92-94%`D. `100%` |
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Answer» Correct Answer - A |
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| 87. |
Which of the following is not a normal oxideA. `Na_(2)O`B. `Al_(2)O_(3)`C. `KO_(2)`D. MgO |
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Answer» Correct Answer - C |
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| 88. |
Oxygen as a super oxide is in the form ofA. `O_(2)^(-2)`B. `O^(-2)`C. `O_(2)^(-)`D. `O^(-)` |
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Answer» Correct Answer - C |
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| 89. |
The two sulphur atoms in `Na_(2)S_(2)O_(3)` haveA. `-2` and `+4` oxidation statesB. `+4` and `+6` oxidation statesC. `+6` and `-2` oxidation statesD. same oxidation state |
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Answer» Correct Answer - C |
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| 90. |
In which of the following conversions all the three oxygen atoms of `O_(3)` molecules are utilised for oxidation: I. Ferrous oxide to ferric oxide II. Acidified stannous chloride to stannic chloride III. Moist iodine to iodic acid VI. Sulphur dioxide to sulphur trioxideA. I and II onlyB. II and IV onlyC. I, III and IV onlyD. II, III and IV only |
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Answer» Correct Answer - B |
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| 91. |
S - S of S = S bond is absent in which of the following acids?A. `H_(2)S_(2)O_(7)`B. `H_(2)S_(2)O_(6)`C. `H_(2)S_(2)O_(3)`D. `H_(2)S_(2)O_(2)` |
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Answer» Correct Answer - A |
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| 92. |
Which of the following is not correct description?A. `SO_(2)-sp_(2)` hybridised sulphur - angular shape - one lone pair over sulpur - one `(dpi-p pi)` and one `(p pi-p pi)` bondB. `SO_(3)^(2-)-sp^(3)` hybridised sulphur - pyramidal shape - one `(dpi-p pi)` bondC. `SO_(4)^(2-)-sp^(3)` hybridised sulphur - tetrahedral shape - tow `(dpi-p pi)` bondsD. `SO_(3)-sp^(3)` hybridised sulphur-planar triangle shape - two `(p pi=p pi)` and one `(dpi-p pi)` bonds |
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Answer» Correct Answer - D |
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| 93. |
Which reaction producese `SO_(2)`A. `2Na_(2)S_(5)+3O_(2)overset(Delta)underset(air)rarr`B. `2Na_(2)SO_(3)+underset("excess")Soverset(Delta)rarr`C. `Na_(2)S_(2)O_(3)+2HCl"(dil)"`D. `Na_(2)S_(2)O_(3)+Cl_(2)+H_(2)Orarr` |
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Answer» Correct Answer - C |
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| 94. |
Which has maximum number of oxo groups ?A. `H_(2)SO_(4)`B. `H_(2)SO_(3)`C. `H_(3)PO_(3)`D. `H_(3)PO_(4)` |
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Answer» Correct Answer - A |
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| 95. |
Which of the following statements are true about sodium thiosulphate?A. It is used in the estimation of iodineB. It gives a white precipitate with `AgNO_(3)` which turns black on standingC. It is used to remove the unexposed AgBr from photographic filmsD. It contains ionic, covalent and coordinate covalent bonds |
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Answer» Correct Answer - A::B::C::D |
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| 96. |
In disulphurous acid, the oxidation states of sulphur can be:A. `+6` and `-2`B. `+6` and 0C. `+5` and `+3`D. `+5` and `-2` |
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Answer» Correct Answer - C |
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| 97. |
Iron sulphide is heated in air to form A, an oxide of sulphur. A is dissolved in water to give an acid. The basicity of this acid is..A. 2B. 3C. 1D. Zero |
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Answer» Correct Answer - A |
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| 98. |
Assertion : A white turbidity is obtained by passing `H_(2)S` through aq solution of `SO_(2)` Reason: Aq solution of `SO_(2)` and `H_(2)S` undergoes redox change to produce colloidal sulphurA. Statement-I and Statement-II are correct and Statement-II is correct explanation of Statement-IB. Statement-I and Statement-II are correct and Statement-II is not correct explanation of Statement-IC. Statement-I is correct and Statement-II is not correctD. Statement-I is not correct and Statement-II is correct |
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Answer» Correct Answer - A |
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| 99. |
Which of the following statements are correct for `SO_(4)^(2-)` ion.A. It is tetrahedralB. All the S - O bond lengths are equal and shorter than expectedC. It contains four sigma bonds between S and O atoms, two pi bonds delocalised over the S and four O atoms and the all the `"S - O"` bonds have the bond order `1.5`D. It is square planar |
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Answer» Correct Answer - A::B::C |
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| 100. |
Which of the following statements regarding thiosulphate ion is incorrectA. Shape of theiosulphat ion is tetrahedralB. The two sulphur atoms in thiosulphate ion are equivalentC. There is S - S bond in thiosulphate ionD. with iodine thisoulphate ion is tetrathionat ion |
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Answer» Correct Answer - B |
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