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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.
| 151. |
Identify the correct sequence of increasing of `pi-` bonds in the structure of the following molecules `:` `(I)H_(2)S_(2)O_(6)" "(II)H_(2)S_(2)O_(3)" "(III)H_(2)S_(2)O_(5)`A. I, ii, iiiB. ii, iii, iC. ii, I, iiiD. I, iii, ii |
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Answer» Correct Answer - B |
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| 152. |
A gas which bleaches substances by reduction process isA. Moist `Cl_(2)`B. `SO_(2)`C. `O_(3)`D. Dry `Cl_(2)` |
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Answer» Correct Answer - B |
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| 153. |
The number of S - S bonds in polythionic acid `(H_(2)S_(n)O_(6))`A. nB. n - 1C. n -2D. None of these |
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Answer» Correct Answer - B |
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| 154. |
When `O_(3)` is passed through an aqueous solution of KI, the pH of the resulting solution isA. 7B. `6.8`C. `2.8`D. 43752 |
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Answer» Correct Answer - D |
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| 155. |
Which is a mutual reduction reaction ? A) `KMnO_(4)+O_(3)` B) `H_(2)O_(2)+O_(3)` C) `Ag_(2)O+O_(3)` D) `KI+H_(2)O+O_(3)`A. A,BB. A,CC. A,DD. B,C |
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Answer» Correct Answer - D |
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| 156. |
In the laboratory `H_(2)S` is prepared by the action ofA. Dil HCl on FeSB. Dil `H_(2)SO_(4) ` on `FeSO_(4)`C. water on `Al_(2)S_(3)`D. Water on FeS |
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Answer» Correct Answer - A |
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| 157. |
Monohalides of selenium are dimeric in nature. Selenium monochloride undergoes disproportionation to give Se and another compound X. The Geometry of X is :A. OctachedralB. Square planarC. See - sawD. Trigonal phyramidal |
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Answer» Correct Answer - C |
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| 158. |
When cobalt trifluoride is treated with sulphur, the compound formed isA. `SF_(6)`B. `SF_(4)`C. `S_(2)F_(2)`D. `SF_(2)` |
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Answer» Correct Answer - B |
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| 159. |
Which oxides are neutralA. NOB. `N_(2)O`C. COD. All |
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Answer» Correct Answer - D |
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| 160. |
Which of the following reactions depict the oxidising behaviour of `H_(2)SO_(4)`?A. `2HI+H_(2)SO_(4)rarrI_(2)+SO_(2)+2H_(2)O`B. `NaCl+H_(2)SO_(4)rarrNaHSO_(4)+HCl`C. `2NaOH+H_(2)SO_(4)rarrNa_(2)SO_(4)+2H_(2)O`D. `2PCl_(5)+H_(2)SO_(4)rarr2POCl_(3)+2HCl+SO_(2)Cl_(2)` |
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Answer» Correct Answer - A |
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| 161. |
Mustard gas is prepared by the reation of ethylene withA. `SF_(6)`B. `SF_(4)`C. `S_(2)Cl_(2)`D. `SCl_(4)` |
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Answer» Correct Answer - C |
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| 162. |
Oxyen is more eletrongative than sulphur, yet `H_(2)S` is acidic while `H_(2)O` in neutral.this is because:A. water us a highly associated compoundB. `H-S` bond is weaker than `H-O` bondC. `H_(2)S` is a gas while `H_(2)O` is a liquidD. the molecular weight of `H_(2)S` is more than that of `H_(2)O`. |
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Answer» Correct Answer - B |
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| 163. |
In which of the following reaction does `SO_(2)` acts as oxidising agent?A. acidified `KMnO_(4)`B. acidified `K_(2)Cr_(2)O_(7)`C. acidified `C_(2)H_(5)OH`D. `H_(2)S` |
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Answer» Correct Answer - D |
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| 164. |
Which of the following will not be oxidised by `O_(3)`?A. KlB. `FeSO_(4)`C. `KMnO_(4)`D. `K_(2)MnO_(4)` |
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Answer» Correct Answer - C |
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| 165. |
Which of the following will not be oxidised by `O_(3)` ?A. KIB. `FeSO_(4)`C. `KMnO_(4)`D. `K_(2)MnO_(4)` |
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Answer» Correct Answer - C |
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| 166. |
At room temperature , `H_(2)O` is liquid while `H_(2)S` is a gas . The reason isA. Electronegativity of O is greater than SB. Difference in the B.A of both the moleculesC. Association takes place in `H_(2)O` due to H-bonding while no H-bonding in `H_(2)S`D. O and S belong to different periods |
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Answer» Correct Answer - C |
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| 167. |
Which of the following reaction cannot change `SO_(2)rarrSO_(4)^(2-)`?A. `SO_(2)+MnO_(4)^(-)overset(H^(+))(rarr)`B. `SO_(2)+Ba(OH)_(2)rarr`C. `SO_(2)+Cr_(2)O_(7)^(2-)overset(H^(+))(rarr)`D. `SO_(2)+Fe^(3+)overset(H^(+))(rarr)` |
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Answer» Correct Answer - B |
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| 168. |
In which of the following central atom makes use of `sp^(3)` hybrid orbitalsA. `SO_(2)`B. `SO_(3)`C. `H_(2)S`D. `H_(2)O` |
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Answer» Correct Answer - D |
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| 169. |
A : In oxygen maximum covalency limits to four F : Absence of d - orbitalsA. Both A and R are true and R is the correct explanation of AB. Both A and R are ture and R is not the correct explanation of AC. A is true R is falseD. A is false but R is true |
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Answer» Correct Answer - A |
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| 170. |
Ozonisation of water is carried to removeA. Bacterial impuritiesB. Bad tasteC. Excess of chlorine presentD. Calcium and magnesium salts present in it |
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Answer» Correct Answer - A |
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| 171. |
Ozone is aA. Mild oxidizing agentB. Powerful oxidizing agentC. Powerful reducing agentD. Mild reducing agent |
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Answer» Correct Answer - B |
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| 172. |
In thiosulphuric acidA. each sulphur atom is in idential oxidation st.B. there is a `"S=S"` linkage presentC. one S atom is in `+2` and other sulphur atom is in `+4` oxidation stateD. there is only one replaceable hydrogen atom |
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Answer» Correct Answer - B |
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| 173. |
Concentrated sulphuric acid connot be used to prepare HBr or HI from KBr of KI because itA. reacts too slowly with KBr or KIB. reduces HBr or HIC. oxidises HBr or HID. oxidises KBr to `KBrO_(3)` or KI to `KIO_(3)` |
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Answer» Correct Answer - C |
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| 174. |
The correct order in which oxygen - oxygen bond dissociation energy increases is:A. `H_(2)O_(2)ltO_(2)ltO_(3)`B. `H_(2)O_(2)ltO_(3)ltO_(2)`C. `O_(2)ltO_(3)ltH_(2)O_(2)`D. `O_(2)ltH_(2)O_(2)ltO_(3)` |
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Answer» Correct Answer - B |
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| 175. |
Which of the following statements regarding `SO_(2)` is not correct?A. It is an angular moleculeB. It is an anhydride of sulphuric acidC. It is an acidic oxideD. The `"S - O"` bond length is smaller than the expected value |
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Answer» Correct Answer - B |
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| 176. |
Which one of the following statement(s) s/are correct regarding `SO_(2)`?A. It acts as both an oxidising agent and reducing agentB. Bleaching action of `SO_(2)` is due to its reducing natureC. It is more acidic than `SO_(3)`D. Bleacing action of `SO_(2)` is due to its oxidising nature |
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Answer» Correct Answer - A::B |
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| 177. |
Which one of the following basic radical (s) `is//are ` precipitated as sulphides in acidic medium in qualitative analysis?A. `Pb^(2+)`B. `Cu^(2+)`C. `Cd^(2+)`D. `Zn^(2+)` |
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Answer» Correct Answer - A::B::C::D |
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| 178. |
Why is `H_(2)S` less acidic than `H_(2)Te` ?A. Less dissociation enthalpy of `H_(2)S`B. More dissociation enthalpy of `H_(2)S`C. Molecular weight of `H_(2)S` is lessD. Melting point of `H_(2)S` is less |
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Answer» Correct Answer - B |
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| 179. |
In the given oxides of chromium, the oxide with higher ionic character and the oxide with higher basic nature respectively are: (i) `CrO` (ii) `CrO_(3)` (iii) `Cr_(2)O_(3)` (iv) `CrO_(2)`A. `CrO_(3) and CrO`B. `CrO and CrO_(3)`C. `CrO_(2) and CrO_(3)`D. `CrO and CrO` |
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Answer» Correct Answer - D |
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| 180. |
The statements regarding hydrides of VIA group elements are i) The order of volatility `H_(2)OltH_(2)TeltH_(2)SeltH_(2)S` ii) The order of B.P `H_(2)OgtH_(2)TegtH_(2)SegtH_(2)S` The order of bond angles `H_(2)OgtH_(2)SgtH_(2)SegtH_(2)Te` The correct combination isA. All are correctB. Only `i` is correctC. ii & iii are correctD. `i` & iii are correct |
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Answer» Correct Answer - A |
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| 181. |
`Mn_(2)O_(7), CrO_(3),V_(2)O_(5)` are ____ oxidesA. BasicB. AcidicC. NeutralD. Amphoteric |
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Answer» Correct Answer - B |
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| 182. |
The charring of sugar takes places when treated with con. `H_(2)SO_(4)`. What is the type of reaction involed in it'A. Addition reactionB. Disproprotionation reactionC. Dehydration reactionD. Hydrolysis reaction |
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Answer» Correct Answer - C |
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| 183. |
(A) : Thermal stability of the hydrides of VIA group elements decreases from `H_(2)O` to `H_(2)Po` (R) : The heats of dissociation of M - H bond of hydrides of VIA group decreases doun the groupA. Both (A) and (R) are true and (R) is the correct explanation of (A)B. Both (A) and (R) are ture and (R) is not the correct explanation of (A)C. (A) is true but (R) is falseD. (A) is false but (R) is true |
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Answer» Correct Answer - A |
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| 184. |
Which of the following statement is trueA. Both rhombic and monoclinic sulphur are solube in waterB. Both rhombic and monoclinic sulphur are soluble in carbon disulphideC. Both rhombic and monoclinic sulphur are insoluble in carbon disulphideD. Phombic sulphur can be converted in to monoclinic sulphur but the revers is not possible |
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Answer» Correct Answer - B |
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| 185. |
Which hydride has maximum decomposition temperatureA. `H_(2)O`B. `H_(2)S`C. `H_(2)Te`D. `H_(2)Se` |
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Answer» Correct Answer - A |
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| 186. |
Crystalline form of Sulphur isA. Plastic sulphurB. Colloidal sulphurC. Monoclinic sulphurD. All of these |
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Answer» Correct Answer - C |
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| 187. |
A white solid reacts with dilute HCI to give colourless gas that de-colourises aqueous bromine. The solid is likely to be.A. Sodium carbonateB. Sodium chlorideC. Sodium acetateD. Sodium thiosulphate |
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Answer» Correct Answer - D |
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| 188. |
Which one of the following is incorrect ?A. Cyclic trimer structure of `SO_(3)` contains Six S = 0 bonds and six S - O - S bondsB. The number of S-S bonds in `H_(2)S_(n)O_(6)` is `n-1`C. `S_(2)` form of sulphur shows paramagnetic behaviourD. `S_(2)O_(7)^(2-)` ion does not contains `S-S` bond |
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Answer» Correct Answer - A |
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| 189. |
The oxidation number of oxygen in `K_(2)O, K_(2)O_(2)` and `KO_(2)` are respecitvelyA. `-2,-1,-(1)/(2)`B. `-(1)/(2),-1,-2`C. `-1,-2,-(1)/(2)`D. `-2,-(1)/(2),-1` |
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Answer» Correct Answer - A |
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| 190. |
Which of the following is incorrect statement regarding `S_(8)` ?A. Sulphur is in `sp^(3)` - hybridised stateB. S-S bond length is 204 pmC. Both valency and oxidation state of sulphur are zeroD. The bond angle S - S - S is `107^(@)` |
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Answer» Correct Answer - C |
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| 191. |
Pick out the incorrect statement regarding ozone:A. The two O - O bonds in ozone are equal in length due to resonanceB. Ozone is diamagneticC. Formation of ozone from dioxygen is endothermicD. Bond angle in ozone is `180^(0)` |
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Answer» Correct Answer - D |
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| 192. |
Which of the following is incorrect ?A. `O_(2)` is weaker than `O_(3)`B. `O_(2)` has small bond length than `O_(3)`C. both `O_(2)` and `O_(3)` are paramagneticD. `O_(3)` is angular in shape |
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Answer» Correct Answer - C |
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| 193. |
The oxidation number of oxygen in `OF_(2)` isA. `-1`B. `-2`C. `+1`D. `+2` |
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Answer» Correct Answer - D |
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| 194. |
Which of the following is incorrect about `S_(8)` moleculeA. No. of lone pairs : 16B. covalency : 2C. Bond order : 1D. Bond length : `205.7` pm |
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Answer» Correct Answer - D |
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| 195. |
Which of the following in incorrect matchA. Stability `H_(2)OgtH_(2)SgtH_(2)SegtH_(2)Te`B. Bond enthalpy : `H_(2)OgtH_(2)SgtH_(2)SegtH_(2)Te`C. Ka `H_(2)OgtH_(2)SgtH_(2)SegtH_(2)Te`D. B.P : `H_(2)SltH_(2)SeltH_(2)TeltH_(2)O` |
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Answer» Correct Answer - C |
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| 196. |
The sulphur molecule `(S_(8))` can be represented as aA. cubical structureB. spherical structureC. tetrahedral structureD. Crown shape ring structure |
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Answer» Correct Answer - D |
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| 197. |
Number of atoms in one molecule of sulphurA. `1.8`B. `2.4`C. `3.3`D. `4.1` |
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Answer» Correct Answer - A |
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| 198. |
In which of the following compounds oxygen exhibits an Oxidation state of `+2`A. `H_(2)O`B. `H_(2)O_(2)`C. `OF_(2)`D. `H_(2)SO_(4)` |
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Answer» Correct Answer - C |
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| 199. |
Paramagnetism is exhibited by molecules whichA. not attracted into a magnetic fieldB. containing only paired electronsC. containing unpaired electronsD. carrying a positive charge |
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Answer» Correct Answer - C |
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| 200. |
Properties of elements X: (i) Its amide is used as a reducing agent (ii) Its amalgam is used as reducing agent Properties of element Y: (i) It is an octaatomic molecule (ii) It is diamagnetic in ground state but paramagnetic in vapour phase Properties of element Z: (i) Its diatomic molecule is paramagnetic (ii) Its allotrope is an absorber of UV radiation (iii) IT supports combustion Compound of X,Y and Z on reaction with Y form a compound A. Out of the following which statement is not correct about compound A?A. used in iodometryB. used in development of photographich platesC. one reaction with `FeCl_(3)` it gives violet colour, which disappear after some timeD. The oxidation number of Y in this compound is `+4` |
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Answer» Correct Answer - D |
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