Tiêu đề 2.16th group elements exercise ( 44 - 68 ).pdf ✅

VIA GROUP ELEMENTS 4 4 NISHITH Multimedia India (Pvt.) Ltd., JEE ADVANCED-VOL-VII NISHITH Multimedia India (Pvt.) Ltd., VIA GROUP ELEMENTS Oxo-Halides: Only S and Se form Oxo-halides. These are called Thionyl halides, and the following are known 2 2 2 2 2 2 SOF SOCl SOBr SeOF SeOCl SeOBr 1. Thionyl Chloride: SOCl2 01. It is a colourless fuming liquid (B.Pt=78o c) 02. Preparation:- PCl SO SOCl POCl 5 2 2 3    03. Most thionyl compunds are readily hydrolysed by water, though 2 SOF only reacts slowly 2 2 2 SOCl H O SO HCl    2 04. 2 SOCl is used in organic reagent to convert Alcohols to alkyl halides and carboxylic acids to acid halides. 05. It is also used to make anhydrous. metal ha- lides. 06. Structure of these oxohalides is 3 Sp -tetrahedral with one position occupied by a lone-pair. 2. Sulphuryl halides: 01. Following sulphuryl halides are known 2 2 2 2 2 2 SO F SO Cl SO FCl SO FBr 02. Sulphuryl chloride 2 2 ( ) SO Cl a colourless furming liq(B.P=69oC) 03. It is obtained by direct reaction of 2 SO and Cl2 in the presence of a catalyst. 04. It is used as a chlorinating agent. 05. It fumes in most air and is hydrolysed by water(Sulphuryl flouride is a gas and is not hydrolysed by water.) 06. Sulphuryl halides have a distrorted tetra hedral structure. 07. They may be regarded as derivatives of H SO 2 4 2 [ ( ) ] SO OH where both OH groups have been replaced by halogens. Note:If only one OH group is replaced, halosulphuric acids are obtained. 3 3 3 [ , , ] FSO H ClSO H BrSO H SYNOPSIS Tests for ozone: 01. By tailing of mercury 02. A clean silver foil is blackened     O O 3 3 2 pure blackened Ag Ag O Ag   oxidation reduction 03. It turns starch iodide paper blue 04. It turns alcoholic tetramethyl base paper voilet 05. It turns alcoholic benzidine solution brown Hydrogen sulphide: H S2 : Preparation: 01. FeS dilH SO H S FeSO    2 4 2 4 in Kipp's apparatus 02. Sb S conc HCl H S SbCl 2 3 2 3    Properties: 01. Colourless gas 02. rotten egg smell 03. H S O limited H O S 2 2 2      H S O excess H O SO 2 2 2 2      04. Weak dibasic acid 2 H S HS S 2    05. H S Ag Ag S H 2 2 2     H S Zn ZnS H 2 2     06. It acts as a reducing agent 07. It reduces 2 4  3 Fe SO to FeSO4 ; MnO / H 4   to 2 Mn  ; 2 Cr O / H 2 7   to 3 Cr  ; HNO3 to NO2 ; PbO2 to PbO 08. It is a good laboratory reagent in qualitative analysis 09. Basic radicals of IIA and IIB are precipitated as sulphides in acidic medium
NISHITH Multimedia India (Pvt.) Ltd., 4 5 JEE MAINS - CW - VOL - I VIA GROUP ELEMENTS NISHITH Multimedia India (Pvt.) Ltd., JEE ADVANCED-VOL-VII 10. Basic radicals of IIIB  2 2 2 2 Zn Ni Mn Co , , ,     are precipitated as sulphides in an alkaline medium Tests for H S2 : 01. It turns lead acetate paper black(PbS) 02. It turns cadmium acetate paper yellow(CdS) Structure of H S: 2 01. Bent(angular) 02. Bond angle: 0 92.5 03. In H S2 , pure p -orbitals of sulphur involved in bonding. LEVEL -V SINGLE ANSWER QUESTIONS 01. SO2 gas is used as a bleaching agent. Its bleaching action is: a) temporary and due to its oxidising nature b) temporary and due to its reducing nature c) permanent and due to its oxidising nature d) permanent and due to its reducing nature 02. Which of the following compounds is formed, when Na SO2 3 is boiled with sul- phur: a) Na SO2 4 b) Na S O 2 2 5 c) Na S O 2 2 6 d) Na S O 2 2 3 03. SCl4 on hydrolysis gives: a) H SO2 3 b) H SO2 4 c) H S O 2 2 7 d) H S O 2 2 8 04. Which of the following is correct? a) SCl4 has one lone pair of electrons on equatorial plane b) SCl4 has two lone pairs of electrons on equatorial plane c) SCl4 has two lone pairs of electrons on axial plane d) SCl4 has one lone pair of electrons on axial plane 05. In which of the following conversions all the three oxygen atoms of O3 molecules are utilised for oxidation: I. Ferrous oxide to ferric oxide II. Acidified stannous chloride to stannic chlo- ride III. Moist iodine to iodic acid IV. Sulphur dioxide to sulphur trioxide a) I and II only b) II and IV only c) I, III and IV only d) II, III and IV only 06. Which gives off oxygen on moderate heat- ing? a) Cupric oxide b) Mercuric oxide c) Zinc oxide d) Aluminium oxide 07. The most acidic and most thermally stable set of chalcogen hydrides are respectively: a) H O,H S 2 2 b) H Te,H O 2 2 c) H O,H Te 2 2 d) H S,H Te 2 2 08. Which of the following has more number of p d    bonds?(all central atoms are in excited states) a) SO2 b) SO3 c) 2 SO3  d) 2 CO3  09. Which of the following is not an acidic ox- ide? a) CO2 b) CO c) NO2 d) P O2 5 10. Which of the following compounds does not give oxygen on heating? a) HgO b) KMnO4 c)  4 2 7 2 NH Cr O d) KClO3 11. The correct order of the O - O bond length in O ,H O 2 2 2 and O3 is: a) O O H O 2 3 2 2   b) O H O O 2 2 2 3   c) O H O O 3 2 2 2   d) H O O O 2 2 3 2   12. Which has maximum number of oxo groups? a) H SO2 4 b) H SO2 3 c) H PO 3 3 d) H PO 3 4 13. In which of the following oxoacids of sul- phur are the two sulphur atoms not in the same oxidation state? a) H S O 2 2 8 b) H S O 2 2 3 c) H S O 2 2 6 d) H S O 2 2 7
VIA GROUP ELEMENTS 4 6 NISHITH Multimedia India (Pvt.) Ltd., JEE ADVANCED-VOL-VII NISHITH Multimedia India (Pvt.) Ltd., 14. In which of the following O - O bond is present? a) 2 S O4 6  b) 2 SO3  c) 2 S O2 8  d) 2 S O2 7  15. Which of the following is not a peroxide? a) H S O 2 2 8 b) H SO2 5 c) H PO 3 5 d) H S O 2 2 7 16. Which of the following reaction depict the oxidising behaviour of H SO2 4 : a) 2 4 2 2 2 2HI H SO I SO 2H O     b) NaCl H SO NaHSO HCl    2 4 4 c) 2 4 2 4 2 2NaOH H SO Na SO 2H O    d) 5 2 4 3 2 2 2PCl H SO 2POCl 2HCl SO Cl     17. The product ‘A’ in the equation: 4 2 2 2KMnO A MnO O     a) Mn O2 7 b) K MnO 2 4 c) K O2 d) K O2 2 18. In which of the following reaction does SO2 acts as oxidising agent? a) acidified KMnO4 b) acidified K Cr O 2 2 7 c) acidified C H OH 2 5 d) H S2 19. Which of the following is not oxidised by ozone? a) KI b) FeSO4 c) KMnO4 d) K MnO 2 4 20. At room temperature H O2 is liquid while H S2 is a gas. The reason is: a) Electronegativity of O is greater than S b) Difference in the B.A of both the molecules c) Association takes place in H O2 due to H-bonding while no H-bonding in H S2 d) O and S belong to different periods 21. Sulphur is soluble in: a) water b) dilute HCl c) Ether d) CS2 22. Which of the following statements regard- ing SO2 is not correct? a) It is an angular molecule b) It is an anhydride of sulphuric acid c) It is an acidic oxide d) The S - O bond length is smaller than the expected value 23. Concentrated sulphuric acid cannot be used to prepare HBr or HI from KBr or KI be- cause it a) reacts too slowly with KBr or KI b) reduces HBr or HI c) oxidises HBr or HI d) oxidises KBr to KBrO3 or KI to KIO3 24. The oxide which on strong heating evolves oxygen is: a) Na O2 b) Al O2 3 c) CaO d) BaO2 25. The correct order in which oxygen - oxy- gen bond dissociation energy increases is: a) H O O O 2 2 2 3   b) H O O O 2 2 3 2   c) O O H O 2 3 2 2   d) O H O O 2 2 2 3   26. In thiosulphuric acid a) each sulphur atom is in identical oxidation st. b) there is a S=S linkage present c) one S atom is in +2 and other sulphur atom is in +4 oxidation state d) there is only one replaceable hydrogen atom 27. One gas bleaches the colour of flowers by reduction, while the other by oxidation, the two gases respectively are: a) COand Cl2 b) H S2 and Br2 c) NH3 and SO3 d) SO2 and Cl2 28. SF6 is unreactive towards hydrolysis be- cause: a) sulphur has very small size b) fluorine is most electronegative element c) sulphur shows + 6 oxidation state d) due to steric hindrance water molecule can- not attack S -atom 29. In disulphurous acid , the oxidation states of sulphur can be: a) 6and 2 b) 6and 0 c) 5and 3 d) 5and 2 30. The gases respectively absorbed by alka- line pyrogallol and oil of cinnamon is: a) N O,O 2 3 b) O ,O2 3 c) O ,CO 3 d) SO ,CH 2 4
NISHITH Multimedia India (Pvt.) Ltd., 4 7 JEE MAINS - CW - VOL - I VIA GROUP ELEMENTS NISHITH Multimedia India (Pvt.) Ltd., JEE ADVANCED-VOL-VII 31. In one of the following compounds oxygen has an oxidation state of 1? a) RbO2 b) PbO2 c) KO2 d) BaO2 32. Which one of the following contains more number of peroxy linkages? a) H TiO 2 4 b) CrO5 c) H PO 3 5 d) H S O 2 2 8 33. I. H O2 2 is not a linear compound II. In H O2 2 , the two hydroxyl groups are not in same plane. III. The dihedral angle in H O2 2 in its vapour phase is 0 90 . IV. In H O2 2 , all four atoms lie in the same plane. Then the correct statement(s) is/are: a) I and IV only b) I and II only c) III and IV only d) I, II, III and IV 34. Identify the incorrect statement? a) The intermediate products obtained during electrolysis of 2 4 50%H SO are H S O 2 2 8 and H SO2 5 b) Complete hydrolysis of one mole of Marshall’s acid gives one mole of H O2 2 and two moles of sulphuric acid c) H SO , H SO 2 4 2 5 and H S O 2 2 8 all acts as oxidising agents. d) During electrolysis of 2 4 50%H SO , H O2 2 is obtained near anode. 34.a Excess of PCl5 reacts with conce H SO2 4 giving a) Thionyl chloride b) Sulphurous chloride c) Chlorosulphonic acid d) Sulphuryl chloride 34.b Monohalides of selenium are dimeric in nature. Selenium monochloride undergoes disproportionation to give Se and another compound X. The Geometry of X is: a) Octahedral b) Square planar c) See - saw d) Trigonal pyramidal 34.c When SO2 gas is sent into sodium sulphite solution, the product formed is a) Na S O 2 2 3 b) NaHSO3 c) NaHSO4 d) Na SO2 4 34.d An inorganic compound X reacts with wa- ter to form two acids Y and Z. X also reacts with NaOH to form two salts B and C which remain in solution. The solutions gives white precipitate with both AgNO3 and BaSO4 so- lutions. What is X a) SO Cl 2 2 b) AlCl3 c) SbCl3 d) PCl F3 2 34.e S - S or S = S bond is absent in which of the following acids? a) H S O 2 2 7 b) H S O 2 2 6 c) H S O 2 2 3 d) H S O 2 2 2 34.f Correct statement among the following is: a) In the lab acidified KMnO4 is prepared by dissolving KMnO4 in conce H SO2 4 b) In the Kipp’s appratus to prepare H S2 gas conce HNO3 can be used c) When O2 is cooled, after certain tempera- ture paramagnetic nature decreases d) Acidic strength order is: H PO H PO H PO 3 4 3 3 3 2   34.g     P white SOCl X halide of P 4 2     Y oxide Z halide of S     Incorrect statement among the following is: a) X on hydrolysis gives a dibasic acid b) Y turns acidified K Cr O 2 2 7 solution to green c) Z has angular structure d) Hydrolysis of Z is a disproportionation reaction