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.
| 201. |
A halogen which is used in the preparation of TEL, an antiknock compound in petroleum isA. `F_2`B. `Cl_2`C. `Br_2`D. `I_2` |
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Answer» Correct Answer - C `C_2H_6+Br_2 to C_2H_5 Br +HBr` ` 4C_2H_5Br + 4NaPbto (C_2H_5)_4Pb (TEL) + 4NaBr + 3Pb` |
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| 202. |
Which of the following bonds is the strongest ? .A. F-FB. Cl-ClC. I-ID. Br-Br. |
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Answer» Correct Answer - B B.E. of Cl-Cl bond is more than F-F bond. The unexpected less B.E. of F-F bond is due to repulsions between the lone pairs of electrons on two F atoms |
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| 203. |
When on excess of chlorine is treated with ammonia ,the products formed areA. `NH_3 and N_2`B. `NCl_3 and HCl`C. `NCl_3 and N_2`D. `NH_4Cl and N_2` |
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Answer» Correct Answer - B `NH_3 + 3Cl_2 ("excess") to NCl_3 +3HCl` |
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| 204. |
Caliche isA. Impure Indian salt petreB. Chile salt petreC. Pure nitreD. None of these |
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Answer» Correct Answer - B Chile salt petre `(NaNO_3)` |
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| 205. |
What products are expected from the desproprtionation reactin of hypochorous acid ?A. `HClO_3 and Cl_2O`B. `HClO_3 and HClO_4`C. `HCl and Cl_2O`D. `HCl and HClO_3` |
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Answer» Correct Answer - D 3HCIO 2 HCI HCI Oz. `3Hoverset(+1)(Cl)O to 2Hoverset(-1)(Cl) + overset(+5)(HClO_3)` |
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| 206. |
Which of the following is not a peroxy acid?A. Perphosphoric acidB. Pernitric acidC. Perdisulphuric acidD. Perchloric acid. |
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Answer» Correct Answer - D Perchloric acid `(HClO_4)` does not contain a peroxide bond. |
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| 207. |
Which of the following elements is extracted commercially by the electrolysis of an aqueous solution of its compound ?A. NaB. AC. BrD. Cl |
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Answer» Correct Answer - D Chlorine is extracted by the electrolysis of aqueous NaCl. |
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| 208. |
Which of the following hydrogen halides possess hydrogen bonding and also is a liquid at room temperature ?A. HClB. HBrC. HFD. HI |
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Answer» Correct Answer - C Due to smaller size and high electronegativity of `F_2`, HF forms hydrogen bond and hence is liquid at room temperature. |
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| 209. |
Which of the following halides is not oxidised by `M no_2` ?A. `F^-`B. `CI^-`C. `Br^(-)`D. `I^-` |
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Answer» Correct Answer - A Fluorine is the strongest oxidising agent do it oxidises other and itself cannot be oxidised. |
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| 210. |
Which of the following hydrogen halide has the highest boiling point?A. HFB. HClC. HBrD. HI |
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Answer» Correct Answer - A Despite the lowest molecular mass, boiling point of HF is highest. This is due to extensive H- bonding in HF, which exists even in liquid state. |
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| 211. |
Identify the false statement about bleaching powderA. Amount of `Cl_2` liberated when it is treated with excess of dilute acid is known a available chlorine.B. Bleaching powder is priced according to it crystal sizeC. Good quality bleaching powder contains 35-38% available chlorine.D. When stored for longer periods it change as it changes to calcium chlorate and calcium chloride (A oxidation). |
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Answer» Correct Answer - B All the other three are correct statements Reaction for statement (D) is `6CaOCl_2 to Ca(ClO_3)_2 + 5CaCl_2` |
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| 212. |
Which of the following is reduced most readily?A. IodineB. ChlorineC. FluorineD. Bromine |
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Answer» Correct Answer - C Due to its highest reduction potential of +2.87 V fluorine is reduced most readily |
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| 213. |
Elements of which of the following groups will form anions most readily ?A. Oxygen familyB. Nitrogen familyC. HalogensD. Alkali metals. |
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Answer» Correct Answer - C Due to their high electron affinities in their respective periods, halogens form anions most easily. |
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