EAMCET QUESTIONS FROM CHAPTER VI A GROUP ELEMENTS PART-1
1.The type of bonds present in sulphuric anhydride :
| 1) | 3s andthreepp - dp | 2) | 3s , onepp - pp andtwopp - dp |
| 3) | 2s andthreepp - dp | 4) | 2s andtwopp - dp |
2.Which one of the following reactions does not occur ?
| 1) | BaO + O3 ® BaO2 + O2 | 2) | PbS + 4O3 ® PbSO4 + 4O2 |
| 3) H 2O2 + O3 ® H 2 O + 2O2 | 4) 2Hg + O3 ® Hg2 O + O2 | ||
3.The number of sigma and pi bonds in peroxodisulphuric acid are respectively
1) 9 and 4 2) 11 and4 3) 4 and 8 4) 4 and 9
4.Which of the following dissolves in water but does not give any oxyacid solution ?
1) SO2 2) OF2 3) SCl4 4) SO3
5.The formula of the product formed when sodium thiosulphate solution is added to silver bromide is
(2007-E)
| | 1) | Ag2 S 2O3 | 2) Ag 2 S | 3) Na3 ëé Ag (S 2 O3 )2 ûù | 4) Ag3 ëé Na (S 2O3 )2 ûù | | |
| 6. | Which of the following is not peroxy acid ? | | | | |||
| | 1) Perphosphoric acid | 2) Pernitric acid | 3) Perdisulphuric acid | 4) Perchloric acid | | ||
| 7. | Which of the following is not correct ? | | | | |||
| | | 3O | silentelectric | | | | |
| | 1) | ¾¾¾¾¾® 2O ; DH = -28.4.5kJ | | | | ||
| | 2 | ¬¾¾¾¾ | 3 | | | | |
| | | | disch arg e | | | | |
2) Ozone undergoes addition reaction with unsaturated carbon compounds
3) Sodium thiosulphate reacts with I2 to form sodium tetrathionate and sodium iodide
4) Ozone oxidises lead sulphide to lead sulphate
8.CFCl3 is responsible for the decomposition of ozone to oxygen. Which of the following reacts with
| | ozone to form oxygen ? | | | |
| | 1) Cl2 | 2) Cl - | 3) F - | 4) Cl + |
| 9. | Observe the following statements | | | |
| | I) Bleaching powder is used in the preparation of chloroform | | ||
| | II) Bleaching powder decomposes in the presence of CoCl2 | to liberate O2 | ||
| | III) Aqueous KHF2 | is used in the preparation of fluorine | | |
| | The correct combination is | | | |
| | 1) I, II and III are correct | 2) Only II is correct | ||
| | 3) Only I and III are correct | 4) Only I and II are correct | ||
| 10. | Which of the following is not correct? | | | |
(1) I2 oxidises sodium thiosulphate to sodium tetrathionate.
(2) Sodium thiosulphate is soluble in water.
(3) Ozone is used to identify the presence of unsaturation in alkenes.
(4) Sodium thiosulphate reacts with iodine to form sodium sulphate.
11.S2 Cl2 hydrolyses slowly to form HCl , SO2 and X. Which of the followingX is
(1) SO3 (2) H2 (3) O2 (4) S
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