Unit19 Group17 - Halogens qns

Unit19 Group17 - Halogens qns - 1 Unit 19 Group 17 or VIIA...

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1 QUEST TUTORIALS Head Office : E-16/289, Sector-8, Rohini, New Delhi, Ph. 65395439 Unit 19 Group 17 or VIIA group (Halogens) 1. The outer shell electronic configuration of iodine (Z=55) (a) 5 s 2 5 p 5 (b) 3 s 2 3 p 5 (c) 4 s 2 p 5 (d) 6 s 2 6 p 5 2. Fluorine is the most reactive element due to (a) its smallest size in the group (b) highest E.N. (c) low bond energy (d) highest E.A. 3. Fluorine is the best O.A. because (a) it has highest E.A. (b) it has highest E ° reduction (c) it has highest E ° oxidation (d) none of these 4. F 2 oxidises water to give (a) O 2 (b) O 3 (c) both (d) atomic oxygen 5. F 2 reacts with dilute NaOH to give oxygen difluoride of the formula (a) F 2 O (b) OF 2 (c) F 2 O 2 (d) F 2 O 3 6. F 2 can be prepared by (a) electrolysis of anhydrous HF (b) electrolysis of aqueous HF (c) electrolysis of fused KHF 2 (d) oxidation of HF by KMnO 4 7. Electrolysis of brine solution in Nelson cell gives (a) Cl 2 (b) H 2 , NaOH (c) Cl 2 , H 2 , NaOH (d) NaCl, NaClO 3 , H 2 O 8. Br 2 is obtained on a large scale from (a) Caranalite (b) Sea water (c) Sea-weeds (d) Ferric bromide 9. The reaction 3Br 2 + 3Na 2 CO 3 5Na Br + NaBrO 3 + 3H 2 O is an example of (a) double displacement (b) decomposition (c) disproportionation (d) neutralisation 10. I 2 is prepared on a large scale from (a) Sea-weeds (b) Calchi (c) Sodium iodate (d) all the above 11. Which of the following is not oxidised by KMnO 4 or K 2 Cr 2 O 7 ? (a) HF (b) HCl (c) HBr (d) HI 12. Which of the following is oxidised by KMnO 4 and not by H 2 SO 4 ? (a) HCl (b) HBr (c) HI (d) H 2 S 13. In the following reaction 3Cl 2 + 6NaOH 5NaCl + NaClO 3 3H 2 O (a) Cl 2 is oxidised (b) Cl 2 is reduced (c) Cl 2 is both oxidised and reduced (d) Cl 2 is neither oxidised nor reduced 14. HI cannot be prepared by action of conc. H 2 SO 4 on NaI because (a) H 2 SP 4 oxidises HI to I 2 (b) HI is the best reducing agent (c) HI is readily oxidised (d) all the above 15. HBr can be best prepared by (a) action of conc. H 2 SO 4 on NaBr (b) action of H 3 PO 4 on NaBr (c) passing Br 2 through SO 2 (d) by reaction of Br 2 with H 2 S 16. Which of the following HY (hydra-acid of halogens) is the strongest acid, best reducing agent, is the least stable, and is easily oxidised? (a) HF (b) HCl (c) HBr (d) HI 17. Which one of the following exists as an asscited liquid, is the poorest reducing agent and is the weakest acid? (a) HF (b) HCl (c) HBr (d) HI 18. Glass is attaked by (a) F 2 (b) HF (c) HCl (d) HBr 19. Which maximum-boiling azeotrope has the lowest boiling point? (a) HF–H 2 O (b) HCl–H 2 O (c) HBr–H 2 O (d) HI–H 2 O 20. No precipitate is formed when AgNO 3 solution is added to the salt solution of (a) NaF (b) NaCl (c) NaBr (d) NaI
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2 QUEST TUTORIALS Head Office : E-16/289, Sector-8, Rohini, New Delhi, Ph. 65395439 21. According to V.S.E.P.R. theory, the geometry of CIF 3 is (a) T-shaped (b) pyramidal (c) angular (d) linear 22. VSEPR theory predicts the shape of BrF
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Unit19 Group17 - Halogens qns - 1 Unit 19 Group 17 or VIIA...

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