Advertisement

Advertisement

Upcoming SlideShare

QBANK ON STOICHIOMETRY-II.pdf

Loading in ... 3

Mar. 25, 2023•0 likes## 1 likes

•13 views## views

Be the first to like this

Show More

Total views

0

On Slideshare

0

From embeds

0

Number of embeds

0

Download to read offline

Report

Education

Q1. Mole fraction of solvent in 0.2 m binary aqueous solution of camphor (m = molality) (A) 0.996 (B) 0.004 (C) 0.96 (D) 0.976 Q2. Volume V1 ml of 0.1 M K2Cr2O7 is needed for complete oxidation of 0.678g N2H4 in acidic medium. The volume of 0.3 M KMnO4 needed for same oxidation in acidic medium will be 2 (A) V 5 (B) V (C) 113 V (D) can't say 5 1 2 1 1 Q3. Ocidation state of sulphur in Caro's acid, H2SO5 is (A) +8 (B) +6 (C) +3 (D) - 2 Q4. The molarity of Cl- in an aqueous solution which was (w/V) 2% NaCl, 4% CaCl and 6% NH4Cl will be (A) 0.342 (B) 0.721 (C) 1.12 (D) 2.18 Q5. The molar ratio of Fe++ to Fe+++ in a mixture of FeSO and Fe (SO ) having equal number of 4 sulphate ion in both ferrous and ferric sulphate is 2 4 3 (A) 1 : 2 (B) 3 : 2 (C) 2 : 3 (D) can't be determined Q6. How many mg of quick lime is required to remove hardness of 1 Kg of hard water having 366 ppm of HCO3 and Ca as the only cation ++ (A) 72 mg (B) 84 mg (C) 168 mg (D) 170 mg Q7. DNA has density 1.1 gm/ml and its molecular weight is 6 x 103 g/mol. Average volume occupied by its single molecule will be (A) 9.1 x 10-20cc (B) 9.1 x 10-21cc (C) 9.8 x 10-21cc (D) 9.6 x 10-20cc Q8. How many ml of 0.3M K2Cr2O7 (acidic) is required for complete oxidation of 5 ml of 0.2 M SnC2O4 solution (A) 3.33 ml (B) 2.22 ml (C) 11 ml (D) 4.44 ml Q9. In the balanced chemical reaction: aCrO 2 bFe(OH) 4H2O cCr(OH)3 dFe(OH)3 OH the value of a, b, c and d are respectively (A) 1, 4, 3, 1 (B) 1, 3, 1, 3 (C) 1, 3, 4, 1 (D) 3, 4, 3, 1 Q10. In which of the compound(s) Iodine has positive oxidation state (A) Iodoform (B) I2O5 (C) ICl (D) HIO3 Q11. For the conversion of 0.240 g NaH2PO4 in a solution to monohydrogen phosphate, 21.4 ml NaOH solution is needed. The molarity of NaOH solution will be (A) 0.093 (B) 0.93 (C) 0.087 (D) 0.083 Q12. 22.7 ml of N/10 Na2CO3 solution neutralises 10.2 ml of dilute H2SO4. Then the volume of water that must be added to 400 ml of same H2SO4 to make it exactly N/10 is (A) 245 ml (B) 484.6 ml (C) 480 ml (D) 490.2 ml Q13. The volume of NH3(at STP) needed to pass into 30 ml of 1N H2SO4 solution to bring down its strength to M/10 is (A) 0.5 litre (B) 636 ml (C) 537.6 ml (D) 540.3 ml Q14. 1.0 gm of a mixture of CaCO3 and NaCl reacts completely with 120 ml of N/10 HCl. The percentage of NaCl in the mixture is (A) 40% (B) 50% (C) 60% (D) 66% Q15. 50 g of 8% by mass NaOH is mixed with 100 g of 8% by mass of HCl, the resulting solution is (A) acidic (B) basic (C) neutral (D) strongly basis Q16. 0.62g Na2CO3 . xH2O completely neutralises 100 ml of N/10 H2SO4. The value of x muxt be (A) 1 (B) 6 (C) 8 (D) 10 Q17. How many litre of O3 at STP will be needed to completely oxidise 10 ml of 0.4M KI into I2 (A) 0.448 (B) 0.0448 (C) 4.48 (D) 2.24 Q18. How many moles of FeCr2O4 can be oxidised completely by 1 mole of KMnO4 in acidic medium. (A) 7 (B) 5 (C) 7/5 (D) 5/7 Q19. A sample of Ca3(PO4)2 contains 3.

STUDY INNOVATIONSFollow

EducatorAdvertisement

Advertisement

Advertisement

- CHEMISTRY
- Q1. Mole fraction ofsolvent in 0.2 mbinary aqueous solution of camphor (m = molality) (A) 0.996 (B) 0.004 (C) 0.96 (D) 0.976 Q2. Volume V1 mlof0.1 M K2 Cr2 O7 is needed for complete oxidation of0.678g N2 H4 inacidic medium. The volume of 0.3 M KMnO4 needed for same oxidation in acidic medium will be (A) 1 V 5 2 (B) 1 V 2 5 (C) 113 V1 (D) can't say Q3. Ocidation state of sulphur in Caro's acid, H2 SO5 is (A) +8 (B) +6 (C) +3 (D) - 2 Q4. The molarity of Cl- in an aqueous solution which was (w/V) 2% NaCl, 4% CaCl2 and 6% NH4 Cl will be (A) 0.342 (B) 0.721 (C) 1.12 (D) 2.18 Q5. The molar ratio of Fe++ to Fe+++ in a mixture of FeSO4 and Fe2 (SO4 )3 having equal number of sulphate ion in both ferrous and ferric sulphate is (A) 1 : 2 (B) 3 : 2 (C) 2 : 3 (D) can't be determined Q6. How manymg of quick lime is required to remove hardness of 1 Kg of hard water having 366 ppm of HCO3 and Ca++ as the only cation (A) 72 mg (B) 84 mg (C) 168 mg (D) 170 mg Q7. DNAhas density1.1 gm/ml and its molecular weight is 6 x 103 g/mol.Average volume occupied by its single molecule will be (A) 9.1 x 10-20 cc (B) 9.1 x 10-21 cc (C) 9.8 x 10-21 cc (D) 9.6 x 10-20 cc Q8. How many ml of 0.3M K2 Cr2 O7 (acidic) is required for complete oxidation of 5 ml of 0.2 M SnC2 O4 solution (A) 3.33 ml (B) 2.22 ml (C) 11 ml (D) 4.44 ml Q9. In the balanced chemical reaction: OH ) OH ( dFe ) OH ( cCr O H 4 ) OH ( bFe aCrO 3 3 2 2 2 4 the value of a, b, c and d are respectively (A) 1, 4, 3, 1 (B) 1, 3, 1, 3 (C) 1, 3, 4, 1 (D) 3, 4, 3, 1 Q10. In which of the compound(s) Iodine has positive oxidation state (A) Iodoform (B) I2 O5 (C) ICl (D) HIO3 Q11. For the conversion of 0.240 g NaH2 PO4 in a solution to monohydrogen phosphate, 21.4 ml NaOH solution is needed. The molarity of NaOH solution will be (A) 0.093 (B) 0.93 (C) 0.087 (D) 0.083 Q12. 22.7 ml of N/10 Na2 CO3 solution neutralises 10.2 ml of dilute H2 SO4 . Then the volume of water that must be added to 400 ml of same H2 SO4 to make it exactly N/10 is (A) 245 ml (B) 484.6 ml (C) 480 ml (D) 490.2 ml Q13. The volume of NH3 (at STP) needed to pass into 30 ml of 1N H2 SO4 solution to bring down its strength to M/10 is (A) 0.5 litre (B) 636 ml (C) 537.6 ml (D) 540.3 ml
- Q14. 1.0 gm ofa mixture ofCaCO3 and NaCl reacts completelywith120 mlofN/10 HCl. The percentage of NaCl in the mixture is (A) 40% (B) 50% (C) 60% (D) 66% Q15. 50 g of 8% by mass NaOH is mixed with 100 g of 8% by mass of HCl, the resulting solution is (A) acidic (B) basic (C) neutral (D) strongly basis Q16. 0.62g Na2 CO3 . xH2 O completely neutralises 100 ml of N/10 H2 SO4 . The value of x muxt be (A) 1 (B) 6 (C) 8 (D) 10 Q17. How many litre of O3 at STP will be needed to completely oxidise 10 ml of 0.4M KI into I2 (A) 0.448 (B) 0.0448 (C) 4.48 (D) 2.24 Q18. How many moles of FeCr2 O4 can be oxidised completely by 1 mole of KMnO4 in acidic medium. (A) 7 (B) 5 (C) 7/5 (D) 5/7 Q19. A sample of Ca3 (PO4 )2 contains 3.1 g phosphorous, the weight of Ca in the sample is (A) 6 gm (B) 4 gm (C) 2 gm (D) 5.56 gm Q20. For an infinitelydilute aqueous solution molality willbe equal to (A) formality (B) molarity (C) mole fraction (D) ppm Q21. KI + I2 + HNO3 HIO3 + KIO3 + NO2 If 3 mole ofKI & 2 moles I2 are reacted with excess ofHNO3 , volume ofNO2 gas evolved at NTP is (A) 716.8Lt (B) 1075.2Lt (C) 44.8Lt (D) 67.2Lt Q22. Ifapieceofirongains 10%ofits weight dueto partialrusting into Fe2 O3 . thepercentage oftotalironthat has rusted is (A) 23 (B) 13 (C) 23.3 (D) 25.67 Q23. Inwhichofthe following reactionequivalent weight ofoxidant is not difined (A) 2BrO3 - + 12H+ + 10e- Br2 + 6H2 O (B) BrO3 + eH+ + 6e- Br- + 3H2 O (C) 3Br2 + 6CO3 + 3H2 O 5Br- + BrO3 + 6HCO3 (D) CaOCl2 + H2 O Ca(OH)2 + Cl2 Q24. In whichofthe following redoxreaction'n' factor ofeveryreactant is non fractional (A) CsBr + Br2 CsBr3 (B) Mn3 O4 Mn++ (C) KI + I2 water KI3 (D) NaNH2 + N2 O NaN3 + H2 O Q25. How manymole ofelectron is needed for reduction ofeach mole ofCr in the reaction CrO5 + H2 SO4 Cr2 (SO4 )3 + H2 O + O2 (A) 4 (B) 3 (C) 6 (D) 7 Q26. To prepare 0.5M KClsolution from100 ml of 0.40 M KCl (A) add 0.745 g KCl (B) add 20 mlofwater (C) add 0.1 mole KCl (D) evaporate 10 mlofwater Q27. Themoles ofAmmoniumsulphate needed to react withonemoleofMnO2 inacidicmediumina reaction giving MnSO4 and (NH4 )2 S2 O8 is (A) 2 (B) 1/2 (C) 1 (D) 1/3
- Q28. A 20 ml(specific gravity 1.02) ofchlorine water is treated with excess ofKI and thr liberated iodine required 25 mlof 0.2N Na2 S2 O3 . The percentage offree chlorine inchlorine water is (A) 0.87 (B) 87 (C) 0.78 (D) 0.82 Q29. An oreofiron, Wustite has the formula Fe0.93 O1.00 . The mole fraction oftotaliron present intheformof Fe(II) is (A) 0.82 (B) 0.85 (C) 0.15 (D) 0.37 Q30. If1 gmofHCland 1 gmofMnO2 heated together the maximumweight ofCl2 gas evolved willbe (A) 2 gm (B) 0.975 gm (C) 0.486 gm (D) 0.972 gm Q31. 35mlsample ofhydrogenperoxide gives off500 mlofO2 at 27o C and 1atmpressure. Volume strength of H2 O2 sample willbe (A) 10 volume (B) 12.8 volume (C) 11 volume (D) 12 volume Q32. When 143.6 mg ZnSO4 . xH2 O is heated strongly in the absence of air, 40.5 mg yellow residue is obtained. Value ofx is (A) 7 (B) 5 (C) 6 (D) 2 Q33. Percentage of free SO3 in an oleumbottle labelled 113.5% H2 SO4 is (A) 40 (B) 60 (C) 50 (D) 45 Q34. For 1.34 x 10-3 moles of KBrO3 to reduce into bromide 4.02 x 10-3 mole of Xn+ ion is needed. New oxidationstate ofX is (A) n + 2 (B) n - 2 (C) 2 (D) -2 Q35. Each molecule of tear gas, Lewisite contains 2 Hydrogen atoms, 1.78 x 10-22 gm. Chlorine, 2 carbon atoms and 1.25 x 10-22 gmofan unknown metal. Its molecular weight willbe (A) 206 (B) 207.5+1 (C) 280 (D) 280.8 Q36. We have three separate solutions of KCl, MgCl2 andAlCl3 . The concentration of Cl- ionis same in all three solution. Whichsolutionwillrequiretheleast volumeto coagulate(precipitate)anegativelycharged colloidalsolution. (A) KClsolution (B) MgCl2 solution (C) AlCl3 solution (D) Allthe same Q37. What volumeof0.3N Cr2 O7 -- /H+ is needed for complete oxidation of200 mlof0.6M FeC2 O4 soution. (A) 1.2 cc (B) 1.2 Litre (C) 120 cc (D) 800 cc Q38. 25 ml of Na2 CO3 solution requires 100 ml of 0.1N HCl to reach end point with Phenolphthalein as indicator. Molarityofresultingsolutionwithrespect to HCO3 - ion (A) 0.008M (B) 0.004M (C) 0.16M (D) 0.08M Q39. Whichconcentrationofa solutionwillchange onheating a solution (A)molality (B)mole fraction (C)volume strength (D) %(W/V) Q40. 5 gmofa metalcarbonate onheating stronglyreleases 1.51 litre CO2 gas at STP. Theequivalent weight ofmetalis (A) 7 (B) 23 (C) 21 (D) 5 Q41. Ifequal volumes of0.1M KMnO4 and 0.1M K2 Cr2 O7 solutions are allowed to oxidise. Fe2+ to Fe3+ in acidic medium, then Fe2+ oxidised willbe (A) more by KMnO4 (B) more by K2 Cr2 O7 (C) equalin both cases (D) can't be determined.
- Q42. Equivalent weight ofMnO4 - inacidic, basic and nuetralmediumare in the ratio of (A) 3 : 5 : 15 (B) 5 : 3 : 1 (C) 5 : 1 : 3 (D) 3 : 15 : 5 Q43. Cl2 reacts withhot NaOH solution, oxidation number ofchlorinechanges from (A) -1 to 0 (B) 0 to -1 (C) 0 to +5 (D) b; c. Q44. MolarityofH2 SO4 is 18 M. Its densityis 1.8 g/cm3 , hence molalityis (A) 18 (B) 100 (C) 36 (D) 500 Q45. x gofthe metalgaveyg ofits oxide. Hence equivalent weight ofthe metal (A) 8 x x x y (B) 8 x ) x y ( x (C) 8 x y x (D) 8 x x y x Q46. Mole fraction of ethyl alcohol in aqueous ethyl alcohol solution is 0.25. Hence percentage of ethyl alcoholbyweight is (A) 54% (B) 25% (C) 75% (D) 46% Q47. 254g ofIodineand 142 g ofChlorineare made to react completelyto give a mixture ofICland ICl3 .The moles ofeachone formed is (A) 0.1M ICl and 0.1M ICl3 (B) 1.0M ICl and 1.0M ICl3 (C) 0.5M ICl and 0.1M ICl3 (D) 0.5M ICl and 1.0M ICl3 Q48. 0.1MofMnO4 - (inacidicmedium)can(Assumethevolumeofreducingagent willbesameintheMnO4 - ) (A) oxidise 0.25M C2 O4 2- (B) oxidise 0.5M Fe2+ (C) oxidise 0.166M FeC2 O4 (D) oxidise 0.6M Cr2 O7 2- Q49. Whichofthe following are redoxreactions? (A) Zn + 2HCl ZnCl2 + H2 (B) Al(OH)3 + 2HCl AlCl3 + 3H2 O (C) Disproportionation ofCu+ ionsin agave solution (D) Ag+ (aq.) + I- (aq.) AgI(s) Q50. Inwhichofthe following species, valencyand oxidationnumbers havedifferent numericalvalues? (A) CO2 (B) CH4 (C) CHCl3 (D) CCl4

Advertisement