Chemistry Topic-wise & Chapter- - Disha Experts

DPP/ CC04 ---t c-151 Infuamnboerrgaonfiscpc3o,smpp2oaunnddscponhtyabinri9d2iz.3e%d cCarabnodn7a.7to%mHs ,inthaelnl 20. 27. In the anion HCoo- the two carbon - oxygen bonds are found to be ofequal length. What is the reason for it ? pm(ao)assssib1=,le25s,2t5rgu/cmtu(obrle))s ofcompound respectively are (molecular (a) Electronic orbitals ofcarbon atom arehybridised (b) TheC =0bondisweakerthanthe C-0 bond 0,4,4 (c) The anion HCOo- has two resonating structures (c) 0,8,4 (d) None of these (d) The anion is obtained byremoval ofa proton from the 21. WN(a)oh3ic-Nh, cooof3-t3h,2Ce-,ofoc3l1l2oo-w3-in, sgoa3re isoelectronic and isostructural? (b) so3 ,N03- acid molecule 28. Which of the following is/are not essential condition(s) for hybridisation? (c) c1o3-,col- (d) col-, so3 (i) The orbitals present in the valence shell of the atom 22. Consider thechemical species N03, NO! and N02 and point out hthyebcriodrrsetacttesotaftNeminenNt gOiv!enisbseplo2w are hybridised. (a) The (ii) The orbitals undergoing hybridisation should have (b) The hybrid state ofN in all the species is the same almost equal energy. (c) Theshapeofboth NO! and N02 is bentwhile N03 (iii) Promotion of electron is essential prior to is planar hybridisation (d) The hybrid state ofN in N03 and N02 is the same 23. Bond order normally gives idea ofstability ofa molecular (iv) Only halffilled orbitals participate in hybridisation. (a) (i) only (b) (iii) only species. All the mthoelyecaurleesnvoitze. qHu2a,lLlyi2satnabdleB.2Thhaeviertshteasbailmitye (c) (iv) only (d) (iii) and (iv) bond order yet order is 29. The molecule XY2 contains two cr and two n bonds and (a) �Li2>>BB22>>L�i2 HLi22>>L�i2>> BB 22 (c) (b) one lone pair of electrons in valence shell of X. The T1 1h-1e2 a+bo1vHe2n�uclear (d) arrangement oflonepair and bond pairs is 2He3 + 0n1 (a) linear (b) trigonal planar 24. (c) square pyramidal (d) tmpredictable reaction is called Themolecules BF3 and NF3 areboth covalent compounds, 25. (a) nuclear fission 30. but BF3 is non polar whereas NF3 is polar. The reason for 26. (b) nuclear fusion 31. (c) artificial transmutation this is (a) atomic size ofboron is larger than nitrogen (d) spontaneous disintegration (b) Boron is metal while nitrogen is gas Hydrogen chloridemolecule contains (a) polar covalent bond (b) double bond (c) B - F bonds are non-polar while N - F bonds arepolar (c) co-ordinate bond (d) electrovalent bond (d) BF3 is planar but NF3 ispyramidal Amongthe followingspecies, identify the isostructuralpairs Athme ognregastteLstiCanl,dRtbhCel,leBaesCt 1io2naincdcMhagrCac12tetrh,erceospmepcmtimvedlyswarieth: NF3, NO) , BF3, H30+,HN3 (a) LiCland RbCl (b) RbCl andBeC12 (a) [NF3,NO)]and[BF3,H30+ ] (c) MgC12 and BeC12 (d) RbCl and MgC12 (b) [NF3,HN3]and[NOj, BF3] 32. Which ofthe following is the wrong statement ? (a) ONCl and ONO-arenot isoelectronic. (c) [NF3,H30+ ]and[N03 , BF:·d (b) 03 molecule is bent (d) [NF3,H30+ ]and[HN3, BF3 ] (c) Ozone is violet-black in solid state (d) Ozone is paramagnetic gas. RESPO'iSE 20.®®0@ 21. ®®0@ 22.®®0@ 23.®®0@ 24. ®®0@ GRID 25.®®0@ 26.®®0@ 27.®®0@ 28.@®0@ 29. ®®0@ 30.®®0@ 3 1. ®®0@ 32.®®0@ Spacefor Rough Work ---

l c-16 DPP/ CC04 33. Forwhichofthe followingmolecule significant ll :t: 0? 38. Which ofthe following molecules have same bond order ? ¢Cl CN H2, Cl2, CO, Br2, N2 (i) ¢(ii) ChooseI theI]corirelcl t oIVptioVn. (a) I, 11 and IV have same bond order (b) III and V have san1ebond order (c) Both (a) and (b) are correct Cl CN (d) None ofthe above 39. Ww(i)ithhicTrhehoseofmnthaoenlcefoeclul?oleweinxigstiss/faorre misconception(s) associated ¢OH ¢SH a certain fraction of time in (ii)i (iv) one cannouical fom1 and for other fractions of time in other catmonical forms. (ii) The cannonical forms have no real existence. OH SH (ii)i There is no such equilibrium between the cannonical (a) Only(i) (b) (i)and(ii) forms. (c) Only(iii) (d) (iii)and (iv) (a) (i) only (b) (ii) and(iii) (Ac)ne(uit)raanl dm(oiilie)cule (d) ze(irioi)doinplyo.le 34. TwhheerbeoansdthdaistsoofciaCti-onFeinnerCgFy4ofisB5-1 F in BmFo3l-is1.6T46hekJcomrorel-c1t 40. XF3 has a moment. The 41. e(ale) mechnltoXriinsem(obs)t libkoerlyon 35. reason forhigher B 5 kJ 42. 36. to that ofC - F is Fbond dissociation energyas compared 43. 37. - 44. (a) stswoitrghotnehnirafgetiaecbsarencttrwthbpeeronenen-dCipsbne:antniwnodteepFeronaisncBstiiCobaFninl4dibt.yeFtwoinefeBsnuFBc3haasnindctoeFmrianpcaBtrioFend3 45. (c) nitrogen (d) carbon The species having pyramidal shape is : (b) (a) so3 (b) BrF3 (c) sior (d) osF2 Bond order of 1.5 is shown by: between C andF in CF4. (a) Oi (b) 02 (c) o�- (d) 02 (c) lBoFw3etrhdaengrtheeatobfeptrwr-eepnrrCni atenrdacFtiionnCbFe4tw. eenB and F in Which one ofthe followingproperties is not shown byNO? (a) It icissonmdeibauimtnraeaslgownxeiittdhiceoixnyggaesneotousfosrtmatenitTogen (d) smaller sizeofB-atom as comparedtothatofC-atom. It Dthiepfoollel-oiwnidnugcepdaidrisp:ole interactions are present in which of (b) It dioxide (c) (d) It's bond order is 2.5 (a) Cl2andCCI4 (b) HCJ and He atoms The charge/size ratio ofa cation determines its polarizing (c) SiF4 and He atoms (d) �0 and alcohol psthpoeewcienierc.sr,WeKas+hii,ncCghaoo2r+nd,eeMroofgf2tth+h,eeBfpoeo2lll+oa?rwizininggspeoqwueenrcoefsthreepcraetsioennitsc The number and type ofbonds in c�- ion in CaC2 are: (a) BKCMae+g222<+++<C<<aKMB2++ge2<<2++MC<<agBK22+e++<+<<<MCBKgae+222+++. (a) One cr bond and one n:-bond (b) One cr bond and two n-bond (b) (c) Two cr bond and two n-bond (d) Two cr bond and one n-bond (c) (d) bWonhidchleonfgtthhe?following methods is used for measuring In which ofthe following pairs ofmolecules/ions, both the species are not likely to exist ? (a) X-ray diffraction (b) Electron-diffraction (a) H!,He�- (b) Hz,He�- (c) Spectroscopic techniques (d) All of these (c) H�+,He2 (d) H z , He�+ RESPO'iSE 33.®®0@ 34.®®0@ 35.®®0@ 36.®®0@ 37. ®®0@ GRID 38.®®0@ 39.®®0@ 40.®®0@ 4 1 . ®®0@ 42. ®®0@ 43.®®0@ 44.®®0@ 45.®®0@ Spacefor Rough Work ---

DPP - Daily Practice Problems Chapter-wise Sheets : L.l-�.Date Start Time : End Time : C H E M I S T R Y (Ceo� SYLLABUS : States of Matter Max. Marks : 180 Marking Scheme : + 4 for correct & (-1 ) for incorrect Time : 60 min. INSTRUCTIONS : This Daily Practice Problem Sheet contains 45 MCQ's. For each question only one option is correct. Darken the correct drcle/ bubble in the Response Grid provided on each page. 1. A compOlmd exists in the gaseous state both as monomer A becomeshalfanditsabsolutetemperature2/3rd. The amount ofthe gas escaped is anddimer A 2 . The M. wt. ofmonomer is48. In an experiment (a) 213m (b) 112m (c) 114m (d) 116m 96 g ofthe compound was confined in vessel of33.6 L and Let the most probable velocity ofhydrogen molecules at a choematepdotmtod2e7x3isotsca. sCaaldciumlaetretothtehepreexstseunrteodfe5v0e%lopbeyd,wiefigthhet 4. tmder the conditions (a) 0.9aun (b) 4.0atm (c) 2.0atm (d) l.Oatm temperatureoft° C be V0 . When the temperature is raised TaWrheheiumc1hoaolnefdcutuhla2erafvoneldllootwchiteiniiergsmoexfatpswrseeossgsaiaorsenessmaatr1etahcneodsrarmmec2etrt?eesmppecetriavtemlye. tmoo(l2etcu+le2s7d3is)°sCocitahtee new rms velocity is (suppose all the into atoms at lattertemperatme) 2. (b) J6vo (c) 5. By what fiancctroerasdeoewshtehne average velocity of a gaseous molecule the temperature (in Kelvin) is doubled ? (a) 2.0 (b) 2.8 3. A container contains certain gas of mass 'm' at high pressure. Someofthegas has been allowed to escape from (c) 4.0 (d) 1.4 the container and after some time the pressure of the gas RI-.SPO:\\SI-. 1 . ®®®@ 2. ®®®@ 3. ®®®@ 4. ®®®@ 5. ®®®@ GRID Spacefor Rough Work ---

lc-18 �-- DPP/ CC05 6. The correct value ofthe gas constant 'R' is close to : (b) (PA I P8 )11 2 (MB I MA) (a) 000...000888222llliiitttrrreee---aattammtmoossoppshhpeehrreeerKeK-11Kmmolo-l1 1 (c) (PA I PB )(MA I Ms )l / 2 (b) o-04.0dm823 litre_, atmosphere - ' K mol (d) (P11 1 Ps )1 1 2 (M11 1 Ms ) ofwater is introducedinto a (c) (d) 7. If ! 1 . 0 dm3 flask at 300 15. Longest mean free path stands for : K, how many moles ofwater are in the vapour phase when equilibrium is established? (a) Hz mean(bs)quaNre2 (c) 02 (d) C� (Given : Vapour pressure of �0 at 300 K is 3 1 70 Pa; 16. The root velocity ofan ideal gas at constant pressure varies with density (d) as R = 8.3 1 4 J K-' mol-1) (a) 5.56x 01 0-3-2mmoolele (b) 1.53 x t0-2 mole (a) d2 (b) d (c) Jd (d) 11 Jd (C) 4.46 X J (d) 1 .27 X 10-3mole 8. A vessel is filled with a mixture of 02 and N 2 . At what 17. The cWorarteecrt<ormdeerthoyflvaislccooshiotyl <ofdtli1meefothllyolweitnhgerli<qugildyscewroilll be (a) ratio ofpartial pressureswill be themass ofgasesbe identical (b) methyl alcohol < glycerol< Wdter< dimethyl ether (c) dimethyl ether< methyl alcohol <water < glycerol (a) p(Oz) = 8.75 p(N2) (b) p(Oz) = 0.78 p(Nz) (d) glycerol < dimethyl ether< water< methyl alcohol (c) P(o2) = 0.875 P(N2) (d) P(o2) = 1 1 .4 P(N2) 18. The molecular velocity ofanygas is (a) inverselyproportional to absolute temperature. 9. Helium has the van der Waal's constant b = 24 mL mol-1 • (b) directlyproportional to square oftemperature. The molecular diameterofbelium will be (c) directly proportional to square root oftemperature. (a) 267pm (b) 133.5pm (d) inverselyproportionaltothe squarerootoftemperature. (c) 26.7pm 19. rWephriecsheonftsththeefoblelohwaviinoguvroolfuomnee(mVo)le- toefmapneirdaetuarlega(Ts )apt olontes (d) Data not sufficient for calculation the diameter. 10. Abubbleofthe gasreleased at thebottom ofa lakeincreases atmospheric pressure ? to eight times the original volume when it reaches at the V(L) V(L) surface. Assuming that the atmospheric pressure is (36.8 L (26.8 L 373 K) equivalent to pressure exerted by a column ofwater 10 m (22.4 L 373 K) (22.4 L high, what is the depth ofthe lake 273K) 273K) (a) 80m (b) Wm (c) 10m (d) 70m 11. Air atsea level is dense. This is a practical application of (a) Boyle's law (b) Charle'slaw (a) T(K) (b) T(K) (c) Kelvin'slaw (d) Brown'slaw V(L) V(L) 12. Which ofthe following represents Gay Lussac's law ? (30.6L 373 K) I. -Tp = constant U. P1T2= P2T1 (22.4 L (22.4 L 273K) 273K) ill. P1V1 =P2V2 3(1743.2KL) Choose the correct option. (c) T{K) (d) T(K} (a) I, II andIII (b) U and Ill (c) IandUI (d) Iandll 20. Match the columns Column-ll 13. A bubble ofair is underwater at temperature ! 5°C and the Column-1 l V oc n at constant T and P pressure 1 .5 bar. Ifthe bubble risesto the surface where the A. Boyle's law temperature is 25°C and the pressure is 1.0 bar, what will B. Charle's law ll. aPttoctaol =nsPta1+ntPT2,+Vp3+ ···· happen to the volume ofthe bubble ? (a) Volumewill becomegreaterbya fa ctor of1.6. m. PTV • Constant (b) Volume will become greaterbyafactorof1 . 1 . c. Dalton's law IV V oc T at constant n andp (c) Volumewill become smallerbya factor ofO.70. D. Avogadro law (d) Volume will become greaterbya factor of2.5. I 14. mWohleencurl,aPr manadssM, rersepperectsievnetlyr,attheeonfdthifefursaitoion,opfrtehsesurareteasnodf V P• V at constant n and T diffi.1sion (rA I r8) oftwo gases A and B, is given as : (a) A - V; B - IV; C - II; D- I (b) A - IV; B - 11; C - I; D - V (c) A - Ill; B - V; C - II; DD -- I (a) (PA I P8 )(MB I M,d12 (d) A - V; B - II; C - IV; III RI-. SPO:\\Sl-. 6. ®®@@ 7. ®®@@ 8. ®®@@ 9. ®®@@ 10. ®®@@ GRID 11. @@@@ 12. @@@@ 13. ®®@@ 14. ®®@@ 15. ®®@@ 16.@@@@ 17.@@@@ 18. @@@@ 19. @@@@ 20. ®®@@ Spacefor Rough Work ---