MOLE CONCEPT (MAIN) FOUNDATION BUILDER (OBJECTIVE) 1. (D) 2. (D) 3. (B) 4. (A) (Most stable isotope of carbon) 5. (D) 6.

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1 FOUNDTION BUILDER (OBJECTIVE). (D). (D). (B) 4. () (Most stable isotope of carbo) 5. (D) 6. (C) 7. () Moles of gas = Molecular weight of gas = Hece NO. MOLE CONCEPT (MIN) 8. () Molecular weight of C60H Weight of a molecule =.90 g () mole cotais vogadro umber of atoms. 0. ().4 Moles of N Number of atoms = = (D) () (B) (C) (D).40 N (C) Number of gms of HSO (D) CENTERS: MUMBI / DELHI / KOL / KOLKT / LUCKNOW / NSHIK / GO / PUNE #

2 Moles of H 0.5 Volume of H i l = l. 4. (D) Moles of u = toms of u = () Mass of oe molecule of 44 CO (C) 0.4 Number of moles of H (B) 8. (B) WH 9g WN 4 4g 9. (C) I oe HO molecule: 0 proto, 8 eutros, 0 electros 6g Hece i 6 ml, HO mols 8g / mol Protos = N 0 0 N 0. () atoms w. Hece it should be of same weight W at.wt. (B) 0 N o. of moles = N 0 wt 0 mol.wt 0 M g M mg 0 0. () : g ; B 6 8g ; C : 0 g ; 6 D 8g. (D) :.55N.5 N ; B:0N ; C : 4N N ; D.88N 4.4N. Hece [D] 4. (C) 5amu 4amu CENTERS: MUMBI / DELHI / KOL / KOLKT / LUCKNOW / NSHIK / GO / PUNE #

3 5. (B) Oe io cotais: = e totales N 64 N 6. (D) wt = 6 g C 7. (C) 8 : 44 ; 46 B: 46 ; 6 C : 8 ; 54 D : (D) 80 HO 0 8 o. of es 00 N 00 N 9. (C).48 Na SO. 5HO H O molecules 0.05 N 0. (C) 90 0 g atom N (B) H O 8 54 (96) (8 8) = 9.. (C) 0.08 HO 0. Hece, molecules = 0 N 8. () 4. N 0.. total = 0.8N.4N 4 4. (D).4 C CHO 0. 4 atom = 0. N [D] 5. (B) 8.4 MgCO Each cotai ( ) protos 6. (B) Hece, total 0. 4N CENTERS: MUMBI / DELHI / KOL / KOLKT / LUCKNOW / NSHIK / GO / PUNE #

4 4.4.4 total 0. molecules = 0.N [D] 4 (i) (ii) (iii) 000 (iv) ml g water 8 8. (B) gas w w mol.wt. a 9. () Fe 0 moles I 60 g carbo, C 5 twice = 0 moles 40. (B) Say Mg PO ; the O = (B) w w x : y : : (C) X X (C) I : O : : : Hece IO () mol. Wt = VD = 00 7 wchlorie 00 7g 00 9g wmetal 45. (C) Mol.wt CENTERS: MUMBI / DELHI / KOL / KOLKT / LUCKNOW / NSHIK / GO / PUNE # 4

5 46. () M VD 4.4 D cl wrt air Dcl Mcl 7 D M 9 air 47. (B) Say NO X. The x 4 x 00 Moxide 46 Doxide wrt O.44 M 48. (D) CaCO air O CaO CO Quatity of limes toes = wt. of oe mole mole of CaCO = 00 kg 49. () Moles of HS. Moles of SO SO H S S H O 50. (C) moles give x.5 L.R. Moles of 00 Mg OH H PO Mg OH Mg PO 6H O Moles 4 4 Moles 6 Give Weight of HPO4 98.6g 5. (D) 4 wt 48 7g H O CH OH 5. () W g O with molex 5mole'O' with.6 ' 'moles mole 'O ' 6 CENTERS: MUMBI / DELHI / KOL / KOLKT / LUCKNOW / NSHIK / GO / PUNE # 5

6 5. () gco g.7 Wg 08.g (D) CO C H OH 5 W 44 88g CO 55. (C) KClO KCl O 56. () Hece % loss i wt = 48g Fe H O iro W (B).6 CaCO CaO CaCl % of CaCl 00.% (D) 59. () 60. (B) 6. (D) BaCl Na PO Ba PO 6NaCl 4 4 Moles (L.R.) 4 4 Ca OH H SO CaSO H O 0. LR 0.5 CaSO CaOH 0. 4 B C D 5 8 LR B C 4 ; B D CENTERS: MUMBI / DELHI / KOL / KOLKT / LUCKNOW / NSHIK / GO / PUNE # 6

7 6. (D) : 4l C l C L.R give 4l 44 w 800g give 50 W B B C C 4D 4 D 4 6. (B) molality 000 urea : NH C NH w solvet O (D) Molarity V ml () 66. (D) 0 0. l 0.M 40 mole KMO4 5 moles FeSO4 V V 0mL 67. (B) 00 H o. of H 0 N () molal mole NaOH i 000g solvet vol 009mL d. CENTERS: MUMBI / DELHI / KOL / KOLKT / LUCKNOW / NSHIK / GO / PUNE # 7

8 Molarity V ml (B) Molarity of NOCO 0. M fter dilutio of 0 ml solutio = M () NaCl XNaCl NaCl HO 8 GET EQUIPPED FOR JEE MIN. () KClO KCl O, O l O lo O l O. () Cosider L solutio 9 d 000 HSO d =. g/ml. () : 4. (C) N H NH 0 5 LR moles N 5 H 0 Fe SO BaCl BaSO FeCl (C) :? BaCl FeCl BaCl 0.75moles CuSO l l SO Cu 4 4 displaces 54g l 9g Cu displaces 7g l 96g CENTERS: MUMBI / DELHI / KOL / KOLKT / LUCKNOW / NSHIK / GO / PUNE # 8

9 6. () CH4 O CO HO = 4 8 4; CH 4 (remaiig) = CO 7. (C) X C0H X O 0CO HO X Hece, 0 4 with X mole C0HX 0 moles 4 8. (D) with.5 moles.5 moles x.5 i.e x 0 4 with 00g CaCO mole HCl with 5L g 0.75M HCl g 9. (B).5 gcl Cl HCl V L Molarity Molarity (D) with X 6g Oxyge with g 0.6g Oxyge 6 X (D) l O l O : with 7g l mole O with mole 7 8g CENTERS: MUMBI / DELHI / KOL / KOLKT / LUCKNOW / NSHIK / GO / PUNE # 9

10 . (D) (POC o S) BaSO SO S (B) NaBr, KBr say 0.97 gbr Br lso, W 9 0. g KBr 4. () 6g. : H 4 4 ; B : H g C : H. ; D : H (C) Total atoms = N 0 N 0.05 N 0 6. (C) Mol. Wt of B For 5 mol, 46 5g =. kg 7. () 00 :0N ; B : 4 D :.5N 7.5N. Hece [] N ; C N 9N 8. (D) (i) 5g (ii) (iii) (iv) () : N B: 6N 4 ; C : 8N 0 ; D : N 6 44 ; 0. (C) wt g 46 CENTERS: MUMBI / DELHI / KOL / KOLKT / LUCKNOW / NSHIK / GO / PUNE # 0

11 . (D) CO 8, say. The O 6 4. () : 0.4g.8g ; 0 B : g 6g ; C : g ; D : 7 g. 60. (D) gram molecule: 44 g molecule of CO = 44 amu 4. () 4 0 H C : :5 C H 5. (D) Total charge = N e Ne coulomb 6. (D) Mol.wt mol.wt (D) g H O 45g silica 4g others 8% H O 45g silica 4g others 00gorigial ' w 'grams 8 % of w = water i.e. 9 % of w = silica others Hece, 9 w 88g w % of silica 00 47% (C) M N. 8 % itroge 8 M 8 8 M (D) 0.04% mol.wt at.wt of N i.e M M CENTERS: MUMBI / DELHI / KOL / KOLKT / LUCKNOW / NSHIK / GO / PUNE #

12 0. () verage atomic mass = x = 9%. (B).. M = Mole fractio of 90 0 x 0 x 8 O 8. (C) 6.00 Moles of Ca OH Moles of HCl = HCl Ca OH HCl CaCl H O L.R. Mole fractio of. ().595 Moles of CuSO Weight of solvet = = Volumes of solvet 80 L Molarity 80 0.M 4. (B) () 8 atoms of O 6.00 ~ 0 (B) atoms of Be 6.00 ~ 0 9 (C) 8 atoms of C (D) 9 atoms of F (C) X Y X Y 0 80 : : XY (C) vogadro hypothesis 7. () Moles of magesium = CENTERS: MUMBI / DELHI / KOL / KOLKT / LUCKNOW / NSHIK / GO / PUNE # 0. 6 O 6

13 Number of magesium atoms = atoms. 8. (D) 50 Moles of compho Number of atoms ( Molecule has 7 atoms) (D) Moles of e (B) Moles of g = 07. Moles of gs required = Mass of g S (D) Mass of ore required = g.4 Moles of l = 7 7 l NaOH HO NalO H Moles Give excess.5 (L.R.) Vol. of H evolved = L.. () Molarity V soluble soluble Lt V solutio is affected by Temperatuere. WINDOW TO JEE MIN. (C) 560 Fe 0 56 No. of atoms = 0 N 70 I 70 g of N o. of atoms = N 5 N 4 0 I 0 g of H o. of atoms = N 0 N. () Mole ratio of C : H : N 9.5 : : 4 CENTERS: MUMBI / DELHI / KOL / KOLKT / LUCKNOW / NSHIK / GO / PUNE #

14 : : 4 4 : 4 : Empirical formula CH4N Empirical formula mass Molecular formula CH4N C6H8N 4. (D) BCl H B 6HCl 5. (B) o.of moles of H o. of moles of B.6 No. of moles of H 0.8 Volume of H.4 L 67.L 6.00 N 0. Molarity (C) Refer theory 7. (C) V = L Wtotal g soluble = Wtotal g 9 = 00 = 897 g.05 molality (B) o. of moles of oxyge atom 8 o. of moles of Mg PO 0 4 No. of moles of Mg PO () V = L soluble =.6 w soluble = w total g 9 CENTERS: MUMBI / DELHI / KOL / KOLKT / LUCKNOW / NSHIK / GO / PUNE # 4

15 6.55 desity 000 =. g/ml 0. (C) l s 6HCl aq l aq 6Cl aq H g Per mole of HCl, o. of moles of H formed Volume of H at STP.4.L. (B) Molality 5. m. i.e. if wt. of HO 000gm the o. of moles of CHOH XCHOH (C) Volume of solutio m.5 0 m Molarity.05M 600. (C) Molarity 0.875M () weight Number of atoms N species atomic weight I 4 g of hydroge Number of atoms 4 N 4N [Here species = because hydroge is preset as H ] I 7 g of chlorie = N 7 Number of atoms = N N 7 I 7 g of iodie, 7 Number of atoms = N N 7 I 48 g of magesium, 48 Number of atoms = N N 4 [Here Mg is preset as Mg so species = ] Thus, the umber of atoms are largest i 4 g of hydroge. CENTERS: MUMBI / DELHI / KOL / KOLKT / LUCKNOW / NSHIK / GO / PUNE # 5

16 5. (B) Heavy water is D O I it, Number of p 8 0 Number of e Number of 8 0 (D have 0 because it is actually, H ) 6. (D) 8 g H O cotais g H 0.7 g H O cotais 0.08 g H. 44 g CO cotais g C.08 g CO cotais 0.84 g C C : H : 0.07 : :8 Empirical formula = C 7 H 8 7. (C) M solutio meas moles of solute (NaCl) are preset i 000 L of solutio. Mass of solutio = volume of solutio desity = 5 g Mass of solute = No. of mole molar mass of NaCl 58.5g = 75.5 g Mass of solvet = (5 75.5)g = g =.076 kg moles of solute Molality mass of solvet i kg.79m () MV MV Fial cocetratio, M V V M 0 9. (B) NO O W O M O W O M N 8 N W M W M 4 N N N N N O 7 0. (B) BaCl H SO BaSO HCl 4 4 CENTERS: MUMBI / DELHI / KOL / KOLKT / LUCKNOW / NSHIK / GO / PUNE # 6

17 0.8gm 4.9gm 0.05mole mole mole 0.05 gm mole 0.05mole.65gm. (B) Volume of solutio ml. 000ml 0000 Molarity M (D) Molecular mass of compoud 6 gm 4 % of H i NH4 00.5%. () No. of moles of acetic acid absorbed by gm charcoal Wt. absorbed by gm mole gm 0.054gm Wt. absorbed per gram gm 8mg 4. (C) B C B C 6 mole 60 mole mole mole C is limitig reaget No. of moles of BC formed 0.0 Wt. of BC formed 4.8gm 4.8 Molecular wt. of BC x x (B) BaCl.xH O 8x x x x x CENTERS: MUMBI / DELHI / KOL / KOLKT / LUCKNOW / NSHIK / GO / PUNE # 7

18 6. (B) 8 00 x x (B) y y CxHy x O xco HO y x y x 5 4 C H 8 CENTERS: MUMBI / DELHI / KOL / KOLKT / LUCKNOW / NSHIK / GO / PUNE # 8

MOLE CONCEPT. 6. (C) Equal volumes of gases have equal number of molecules (not atoms) at same temperature and pressure condition

MOLE CONCEPT. 6. (C) Equal volumes of gases have equal number of molecules (not atoms) at same temperature and pressure condition FOUNDTION BUILDER (OBJECTIVE). (D). (D). (B) MOLE CONCEPT 4. () Most stable isotope of carbo 5. (D) 6. (C) Equal volumes of gases have equal umber of molecules (ot atoms) at same temperature ad pressure