InterviewSolution
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InterviewSolution
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Pick out the incorrect statement regarding hydrogen halides.A. Hydrogen chloride can be prepared by the reaction of NaCl with conc. `H_2SO_4`B. Reactions of respective ionic halides, i.e., NaBr and KI with conc. `H_2SO_4` are employed to produce HBr and HIC. Hdrogen halides (X=Cl, Br, I) are prepared by action of phosphorus trihalides with water.D. A solution of hydrogen chlorides in toluene does affect blue litmus paper. |
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Answer» Correct Answer - B Reactions of NaBr and KI with conc. `H_2SO_4` cannot be used to prepare HBr and EI, since these two hydrides are reducing agents and are readily oxidized by conc. `H_2SO_4` `2HX +H_(2)SO_(4)to SO_(2)+2H_(2)O+X_(2), X=Br,I` (a) (i) `NaCl+H_(2)SO_(4) to NaHSO_(4)+HCl("in the cold")` (ii) `NaHSO_(4)+NaCl to NaHSO_(4)+HCl("on heating")` (c) `PX_(3)+3H_(2)O to H_(2)PO_(3)+3HX` For example `PCl_(3)+3H_(2)O to H_(3)PO_(3)+3HCl` `underset(("Red"))(2P)+3Br_(2) to 2PBr_(3)` `underset(("Red"))(2P)+3I_(2) to 2PI_(3)` `PBr_(3)+3H_(2)O to H_(3)PO_(3)+3HBr_(2)` `and PI_(3)+3H_(2)O to H_(3)PO_(3)+3HI` |
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