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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.
| 201. |
In `S_(2)` molecule the two unpaired electrons are present inA. `pi`B. `pi^(**)`C. `sigma`D. `sigma^(**)` |
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Answer» Correct Answer - B |
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| 202. |
Which chalcogon contains same no.of S and P electronsA. SB. TeC. OD. Se |
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Answer» Correct Answer - C |
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| 203. |
Which element occurs in native stateA. IB. SC. PD. Mg |
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Answer» Correct Answer - A |
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| 204. |
Oxygen exhibits least oxidation state inA. `OF_(2)`B. `KO_(2)`C. `H_(2)O`D. `H_(2)O_(2)` |
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Answer» Correct Answer - C |
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| 205. |
Sulphuric acid is considered as the king of chemicals. The prosperity of any country is measured by the amount of sulphuric acid it consumes. Sulphuric acid is, thus, a substance of very great commercial importance as it used practically ine every important industry. This is due to the following properties of sulphuric acid : (a) acidic nature (b) oxidising nature (c) dehydrating nature (d) sulphonation. Sulphuric acid is used.A. In real storage batteriesB. In maknig fertilizersC. In making exploxivesD. All of these |
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Answer» Correct Answer - D |
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| 206. |
The chalcogen having same number of electrons both in penultimate and antipenultimate shells isA. OB. SC. SeD. Te |
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Answer» Correct Answer - D |
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| 207. |
Which of the following sets of atomic numbers belongs to chalcogensA. 8,52,84B. 9,17,35C. 20,37,56D. 14,32,50 |
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Answer» Correct Answer - A |
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| 208. |
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 and Z + Compound of Y and Z `rarr` product(s). Oxidation number of Y in the final compound may be:A. `+4` or `+6`B. 0 and `+2`C. `+3` and `+5`D. `-2` and `+4` |
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Answer» Correct Answer - A |
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| 209. |
Sulphuric acid is considered as the king of chemicals. The prosperity of any country is measured by the amount of sulphuric acid it consumes. Sulphuric acid is, thus, a substance of very great commercial importance as it used practically ine every important industry. This is due to the following properties of sulphuric acid : (a) acidic nature (b) oxidising nature (c) dehydrating nature (d) sulphonation. Sulphuric acid has very corresive action on skin becauseA. It reacts with proteinsB. It acts as an oxidising agentC. It acts as a dehydrating agentD. It acts as a dehydrating agent and absorption of water is highly exothermic |
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Answer» Correct Answer - D |
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| 210. |
Electron affinity order of chalcogens isA. `SgtSegtTegtO`B. `OgtSgtSegtTegtPo`C. `SgtOgtSegtTegtPo`D. `PgtPogtTegtSegtS` |
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Answer» Correct Answer - A |
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| 211. |
Sulphuric acid is considered as the king of chemicals. The prosperity of any country is measured by the amount of sulphuric acid it consumes. Sulphuric acid is, thus, a substance of very great commercial importance as it used practically ine every important industry. This is due to the following properties of sulphuric acid : (a) acidic nature (b) oxidising nature (c) dehydrating nature (d) sulphonation. only carbon is obtained when concentrated `H_2 SO_4` is added toA. Formic acidB. Cane sugarC. Oxalic acidD. Ethyl alcohol |
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Answer» Correct Answer - B |
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| 212. |
Sulphuric acid is considered as the king of chemicals. The prosperity of any country is measured by the amount of sulphuric acid it consumes. Sulphuric acid is, thus, a substance of very great commercial importance as it used practically ine every important industry. This is due to the following properties of sulphuric acid : (a) acidic nature (b) oxidising nature (c) dehydrating nature (d) sulphonation. Concentrated `H_2 SO_4` cannot be used to prepare `HBr` or `HI` from `KBr` or `KI` because it.A. Reacts two slowly with KBr or KIB. Reduces HBr or HIC. oxidises HBr or HID. Oxidises KBr to `KBrO_(3)` or KI to `KIO_(3)`5 |
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Answer» Correct Answer - C |
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| 213. |
Which characteristic is not correct about `H_(2)SO_(4)`?A. Reducing agentB. Oxidising agentC. Sulphonating agentD. Highly viscous |
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Answer» Correct Answer - A |
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| 214. |
What happens when `H_(2)SO_(4)` added to `CaF_(2)`A. Gives `CaSO_(4)`B. Gives HFC. Gives 1 & 2D. Gives `CaHF_(2)` |
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Answer» Correct Answer - C |
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| 215. |
What is the hybridisation of sulphur in `H_(2)SO_(4)` ?A. spB. `sp^(2)`C. `sp^(3)`D. `sp^(3)d^(2)` |
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Answer» Correct Answer - C |
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| 216. |
What is the number of sigma `(sigma)` and pi `(pi)` bonds present in sulphuric acid molecule ?A. 6 `sigma` and 2 `pi`B. 6 `sigma` and 10 `pi`C. 2 `sigma` and 4 `pi`D. 2 `sigma` and 2 `pi` |
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Answer» Correct Answer - A |
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| 217. |
Sulphur trioxide is dissolved in heavy water to form a compound X. The hybridisation state of sulphur in X isA. `SP^(2)`B. `SP^(3)`C. SPD. `dSP^(2)` |
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Answer» Correct Answer - B |
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| 218. |
Hg sticks to the surface of glass when it comes into contact withA. `H_(2)O`B. `HNO_(3)`C. GreaseD. `O_(3)` |
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Answer» Correct Answer - D |
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| 219. |
Impurity along `SO_(2)` is __ and it is removed byA. `As_(2)O_(3),Fe_(2)O_(3),xH_(2)O`B. `H_(2)S,Al(OH)_(3)`C. `H_(2)S,Fe_(2)O_(3),xH_(2)O`D. `AS_(2)O_(3),Al_(2)O_(3),xH_(2)O` |
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Answer» Correct Answer - A |
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| 220. |
Which of these statements incorrectly compare between `SF_(4)` and `SF_(6)` ?A. both molecule have same hybridisation for S atomB. both molecules have at least one linear `F-S-F` linkC. `SF_(6)` has higher boiling point than `SF_(4)`D. `SF_(4)` reacts vigorously with water whereas `SF_(6)` is inert towards water |
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Answer» Correct Answer - A::B::C |
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| 221. |
The oxoacid of sulphur which contains two sulphur atoms in different oxidation statesA. pyrosulphurous acidB. Hyposulphurous acidC. pyrosulphuric acidD. persulphuric acid |
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Answer» Correct Answer - A |
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| 222. |
Which of the following is correct?A. `SCl_(4)` has one lone pair of electrons on equatorial planeB. `SCl_(4)` has two lone pairs of electrons on equatorial planeC. `SCl_(4)` has two lone pairs of electrons on axial planeD. `SCl_(4)` has one lone pair of electrons on electrons on axial plane |
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Answer» Correct Answer - A |
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| 223. |
A solution of sulphur dioxide in water reacts with `H_(2)S` precipitating sulphur. Here sulphur dioxide acts asA. an oxidising agentB. a reducing agentC. an acidD. a catalyst |
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Answer» Correct Answer - A |
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| 224. |
Which of the following equations repreaents the oxidising action of sulphar dioxide.A. `2Fe^(3+)+SO_(2)+2H_(2)Orarr2Fe^(2+)+SO_(4)^(2-)+4H^(+)`B. `3Fe+SO_(2)rarr2FeO+FeS`C. `2MnO_(4)^(-)+2H_(2)O+5SO_(2)rarr2Mn^(2+)+4H^(+)+5SO_(2)^(2+)`D. `Cr_(2)O_(7)^(2-)+2H^(+)+3SO_(2)rarr2C_(r)^(3+)3SO_(4)^(2-)+H_(2)O` |
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Answer» Correct Answer - B |
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| 225. |
Sulphur having same oxidation state is:A. `H_(2)S_(2)O_(8)`B. `H_(2)S_(2)O_(7)`C. `H_(2)SO_(5)`D. `H_(2)S_(2)O_(5)` |
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Answer» Correct Answer - A::B::C |
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| 226. |
Statement-I : Number of peroxide bonds in permono and perdisulphuric acid are 1 and 2 respectively Statement-II : Both are dibasic and permonosulphuric acid does not exist in free state but its salts are reducing agent where as perdisulphuric acid salts are oxidantA. 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 - D |
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| 227. |
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 that obtained by lead chamber process. |
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Answer» Correct Answer - C |
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| 228. |
An oxyacid of sulphur contained S = S linkage and the oxidation number of S in it is `+6` and `-2`. It belongs toA. `"-ous"` seriesB. `"-ic"` seriesC. peroxo seriesD. thionic acid series |
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Answer» Correct Answer - B |
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| 229. |
Which of the following statements regarding sulphur is incorrect?A. `S_(2)` molecule is paramagneticB. The vapour at `200^(@)C` consists mostly `S_(8)` ringsC. At `600^(@)C`, the mainly consists of `S_(2)` moleculesD. The oxidation state of sulphur is never less than `+4` its compounds. |
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Answer» Correct Answer - D |
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| 230. |
Which of the following does not have `O-O` linkage but have sulphur-sulphur linkage?A. `S_(2)O_(8)^(2-)`B. `S_(2)O_(6)^(2-)`C. `S_(2)O_(5)^(2-)`D. `S_(2)O_(3)^(2-)` |
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Answer» Correct Answer - B::C::D |
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| 231. |
Ozone readily dissolve inA. waterB. `CS_(2)`C. ammoniaD. turpentine oil |
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Answer» Correct Answer - D |
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| 232. |
Which of the following compounds can be used for drying of `H_(2)S` gas?A. Conc. `H_(2)SO_(4)`B. `P_(2)O_(5)`C. fused `CaCl_(2)`D. anhydrous `Al_(2)O_(3)` |
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Answer» Correct Answer - B::C::D |
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| 233. |
Which one of the following is/are true for `O_(3)`A. it oxidises lead sulphideB. It oxidises potassium iodideC. It oxidises mercuryD. it cannot act as bleaching agent in dry state. |
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Answer» Correct Answer - A::B::C |
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| 234. |
In which of the following ozone is completely consumed?A. KI is oxidised to `I_(2)` by ozoneB. HCl is oxidised to `Cl_(2)` by ozoneC. `SO_(2)` is oxidised to `SO_(3)` by ozoneD. PbS is oxidised to `PbSO_(4)` by ozone |
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Answer» Correct Answer - D |
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| 235. |
Which of the following does not give oxygen on heating?A. HgOB. `KMnO_(4)`C. `(NH_(4))_(2)Cr_(2)O_(7)`D. `KClO_(3)` |
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Answer» Correct Answer - C |
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| 236. |
Which of the following statement (s) `is//are` true about ozone?A. It is a pale blur gas at room temperatureB. It oxidises S and P evolving oxygen gasC. It oxidises `SnCl_(2)//HCl` and `SO_(2)` evolving oxygen gasD. It reacts with `BaO_(2) and H_(2)O_(2)` evolving oxygen gas |
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Answer» Correct Answer - A::B::D |
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| 237. |
Which compound on heating alone does not form `O_(2)`?A. `KClO_(4)`B. `KMnO_(4)`C. `KNO_(3)`D. `NH_(4)NO_(2)` |
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Answer» Correct Answer - D |
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| 238. |
Ozone belongs to which groups of the periodic table?A. IVAB. VAC. VIAD. VIIA |
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Answer» Correct Answer - C |
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| 239. |
The compound which gives oxygen on moderate heating isA. Cupric oxideB. Mercuric oxidesC. Zinc oxideD. Aluminium oxide |
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Answer» Correct Answer - B |
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| 240. |
Which aerosols deplete ozoneA. SmokeB. Nitrogen oxidesC. FreonsD. 2 and 3 |
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Answer» Correct Answer - D |
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| 241. |
Silver on warming in `O_(3)` the reaction isA. Oxidation of the metalB. Formation of ozonideC. Alternate oxidation of the metal and reduction of oxide takes placeD. Reduction of metal |
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Answer» Correct Answer - C |
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| 242. |
About sulphuric acid which is not correct?A. Reducing agentB. Dehydrating agentC. Sulphonating agentD. Highy viscous |
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Answer» Correct Answer - A |
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| 243. |
Which of the following statements is correct?A. `SF_(4)` is polar and non reactiveB. `SF_(4)` is prepared by fluorinating `SCl_(2)` with NaFC. `SF_(6)` is non polar and very reactiveD. `SF_(6)` is strong fluorinating agent |
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Answer» Correct Answer - B |
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| 244. |
`SF_6` is unreactive towards water becauseA. sulphur has very small sizeB. fluorine is most electronegative elementC. sulphur shows `+6` oxidation stateD. due to steric hindrance water molecule cannot attack S -atom |
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Answer» Correct Answer - D |
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| 245. |
Which of the following metals loses its meniscus after reacting with ozone?A. PbB. HgC. CuD. Ag |
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Answer» Correct Answer - B |
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| 246. |
The number of S-S bonds in sulphur trioxide trimer `(S_(3)O_(9))` isA. ThreeB. TwoC. OneD. Zero |
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Answer» Correct Answer - D |
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| 247. |
In the following reaction: `ZnS+O_(2)overset(Delta)rarrA+ZnO` `4HCl+O_(2)overset(CuCl_(2))rarrB+2H_(2)O` `A+B overset(hv)rarrC` Then A, B and C are:A. `SO_(2),Cl_(2),SOCl_(2)`B. `SO_(2),Cl_(2),SO_(2)Cl_(2)`C. `SO_(3),Cl_(2),SOCl_(2)`D. `SO_(3),HClO_(3),HClO_(4)` |
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Answer» Correct Answer - B |
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| 248. |
Componds `(A)` and `B` are treated with dilute `HCl` separately. The gases liberated are `Y` and `Z` respectively. `Y` turns acidified `K_2 Cr_2 O_7` paper green while `Z` turns lead acetate paper black. The compounds `A` and `B` are respectively :A. `Na_(2)SO_(3) and Na_(2)S`B. `Na_(2)S and Na_(2)SO_(3)`C. `Na_(2)SO_(3) and Na_(2)SO_(4)`D. `NaC1 and Na_(2)CO_(3)` |
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Answer» Correct Answer - A |
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| 249. |
`2S"(fused)" +Cl_(2) rarr A` `A+H_(2)O rarr HCl+B+C` A, B and C in the above equations are:A. `S_(2)Cl_(2),SO_(2),S`B. `SCl_(2),SO_(2),SO_(3)`C. `S_(2)Cl_(2),SO_(3),SO_(4)^(2-)`D. `S_(2)Cl_(2),SO_(2),H_(2)SO_(4)` |
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Answer» Correct Answer - A |
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| 250. |
`S_(1): 2Se_(2)Cl_(2)rarr SeCl_(4)+3Se` `S_(2)` : Dioxides like `MnO_(2), PbO_(2)` do not form `H_(2)O_(2)` with dilute acids but they evolve oxygen with concentrated `H_(2)SO_(4)`. `S_(3)` : Sodium thiosulphate with `FeCl_(3)` solution develops a pink or violet colour which soon vanishes. `S_(4)` : White precipitate of `PbS_(2)O_(3)` get soluble when boiled with water.A. FTTTB. TFTTC. FFTTD. TTTF |
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Answer» Correct Answer - D |
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