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6B of Carbon is completely burnt in a large excess, of oxygen. The volume in litres of CO, formed at STP, , is (10M 2005), a. 5.6 b. 8.0, , c. 11.2 d. 16.2, , 3.34 g of an oxide ‘x’ of atomic weight 127 contains, 2.54 g of X. Its formula should be (1OM 2008), a. X03 b. X204, , c X05 d. X,07, , Assuming the density of water to be ig/cc the, volume occupied by one molecule of water is, , QUESTIONS FROM PREVIOUS EXAMINATIONS |, , a. 2.98x107 cc b. 2.98x10~cc —(IOM 2008),, c. 6.02x10%cc d. 6.02x 10” cc, , If standard reference for calculating molecular, weight is taken as 1/6" of C then molecular weight, of water will be (BPKIHS 2000), a. 18 b. 9, , c. 36 d. None, , Which of the following weighs the least?, , a. 249 mg of Mg (BPKIHS 2000), b. 0.9 moles of NO, , c. 22.4 litres of N. of NTP, , d. 6.02 x 10” molecules of oxygen, , Scanned with CamScanner

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tains how many molecules, , gol nydrogent con i 2001, one “, * eogaxto” =O g.023 x 10, , i sito" a 302x107 son, , i and 2 mole o} oxygen a, ey NS meer the volume of the resulting, A nixed together at TAP. ne =, , \, Tal b. (2b, ¢, 33.6b d. 204, , ins 0.339% lron. Assuming that, , nta, g, Haemoglobin con's f Iron per molecule of, , re four atoms o, ‘eyoH0bln Its approximate molecular wt. Is, fauna tobe (BPKIHS 2004), urn, . 17,000 b, 34,000, c, 67,700 d, 85,000, , le of pure water, Irrespective of source,, , * a Asan oxygen and 11.11% hydrogen by, mass, The data supports the (BPKIHS 2005), a. Lawof conservation of mass, b. Law of constant composition, c. Lawof multiple proportions, d. Lawof reciprocal proportion, , 10. The number of molecules in 16 g of methane Is, a. 30x10” b. 6.02x10" _ (BPKIHS-2007), e g02x3x10% d. 6.02X6x10™, , 11. The equivalent mass of oxalic acid in Its reaction, with potassium permanganate in acidic medium Is, equal to its (BPKIHS-2007), a. Molar mass b, Molar mass/2, c. Molar mass/3 d. Molar mass/1.5, , 42. The no. of water molecules present in a drop of, water (volume = 0.0018 mL) at room temperature is, a. 6.023x10" — b. 1.084x10"° (BPKIHS-2008), c. 4.84% 10" d. 6.023 x 10”, , 43. The formula of metal chloride is MCl3. It contains, 20% of the metal, the atomic wt. of the metal is, , a. 27 b. 56 (BPKIHS-2009), 'G:<427 d. 48, , 14. The equivalent wt. of phosphoric acid (H3PO,) in the, reaction (BPKIHS-2009), NaOH +H;PO, —> NaHPO,+H,0, a, 25 b. 49, c. 59 d. 98, , 15. “One gram molecule of a gas at N.T.P. occupies 22.4, litres.” This fact was derived from (BPKIHS-2009), a. Dalton’s theory, b. Avogadro’s hypothesis, c. Berzelius hypothesis, d. Law of gaseous volume, , 16. An aqueous solution of glucose is 10% in strength., The volume in which 1 g mole of it is dissolved will, , be, a. 18\itres b. Qlitres BPKIHS-:, b. 0.9 litres d, 1.8 litres an, 17. Amount of quick lime obtained wh, en 200, CaCO; is burnt Is oo, , (1.E.-2009), , , , a, 112.2kg b. 106.4 kg, , Scanned with CamScanner

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wmany molecules, pnydroeen contains ho (BPKIHS 2001), , ones? i, 23 b. 6,023 10°°, 25, , mole of oxygen are, , f the resulting, (BPKIHS 2001), , a, , 3.01% 10”, hydro, her at §,T.P., , c, en and 2, a. moles of The volume 0, mixed toget, mixture Is, , a, 22.4¢, c. 33.6L, , 8. Haemoglobin cont ;, . ms 0, there are four ato!, haemoglobin, its approximate mol, found to be, , a. 17,000, oe of pure water irrespective of source,, * 1 88.89% oxyBen and 11.11% hydrogen by, mass. The data supports the (BPKIHS 2005), a, Law of conservation of mass, b. Law of constant composition, Law of multiple proportions, procal proportion, , b, U.2L, , d. 20L, ains 0.33% Iron. Assuming that, , iron per molecule of, lecular wt. Is, (BPKIHS 2004), , b, 34,000, d. 85,000, , c., , d. Law of reci, 10. The number of molecules in 16 6 of methane Is, a. 3.0x10" b, 6.02x10" _ (BPKIHS-2007), d. 6.02 x6 x 10°, , ©, 6,02x3x10", 11, The equivalent ma, , with potassium per!, , equal to its, , a, Molar mass, , c. Molar mass/:, of water molecules pre:, , acid in Its reaction, ic medium Is, (BPKIHS-2007), , ss of oxalic, manganate In acid!, , b. Molar mass/2, , 3 d. Molar mass/1.5, sent in a drop of, , 12, The no., water (volume = 0.0018 mL) atroom temperature Is, a, 6,023x10" —b. .1.084x 10 (BPKIHS-2008), c. 4.84x 10" d, 6.023x 10", , hloride is MCI. It contains, wt. of the metal is, (BPKIHS-2009), , 13. The formula of metal c, 20% of the metal, the atomic, , a, 27 b. 56, : 427 d. 48, 14. The equivalent wt. of phosphoric acid (H3PO,) In the, reaction (BPKIHS-2009), NaOH + Hy3PO, —> NaH,PO, + H,0, a, 25 b, 49, d. 98, , iz c, 59, ” 45, “One gram molecule of a gas at N;, litres.” This fact was derived from, a, Dalton’s theory, , b. Avogadro's hypothesis, , c. Berzelius hypothesis, , d. Law of gaseous volume, 46. An aqueous solution of glucose Is 10% in strength., , The volume in which 1 g mole of it Is dissolved will, , , , .T.P. occupies 22.4, (BPKIHS-2009), , be, a, 18 fitres b. Qlitres (BPKIHS-2009), b, 0.9 litres’ d. 1.8 litres, 17. Amount of quick lime obtalned when 200 kg of 95%, CaCO; Is burnt is (I.E.-2009), , a, 112.2kg b. 106.4 kg, , , , c. 90ke d, 56kg, 18, 0,38'g of a silver salt of a dibasle acid, Blues, silver on heating. The molecular wt, of acig te ty, , a 45 b, 104 ', c. 90 4. 96 (E209,, 19, 180 g of pure water Is equal to.nu.moles, (1, a1 b. 10 , (E209,, c, 100 d, 18, 20. The percentage of oxygen by mass In ma,, oxide Is Bnesty, a. 20% b, 40% (MOE ao,, c. 50% d. 60%, 21. The volume of O; at NTP required for combustig,, mole of butane Is (MoE i fy, a 291.2 iit b. 480.6 lit 99), c, 145.6 lit d, 11.2 /it, , 22. The equivalent weight of divalent metal Is 12, fi, Fling, , molecular weight of the metal oxide Mo}, a. 40 b. 16 (MOE 201, c. 28 d. 32, , 23. Ten moles of oxygen are available for combustion, of, , one mole of octane, it leads to (BPKIHS-199, a. Complete combustion 5), b. Incomplete of combustion, c. Bothaandbcanoccur d. None, , 24, One g hydrogen contains (BPKIHS-1957), , a. 6.0210” no. of molecules, b. 3,02x10” no. of molecules, c. 6.023x10" no. of molecules, d, 4.610" no. of molecules, 25. Chlorine gas has its Isotopes Cl - 34.975 as 25% anda., , - 37.115 as 75%, then its actual atomic wt. is, a. 36.57 b. 33.55 (BPKIHS-1998), , c. 41.75 d. none, 26. Find the octane number of fuel containing 10% 2, 2, , 4-trimethyl pentane and 90% n-heptane (BPKIHS-1999), a. 50 b, 45, c. 10 d, 90, , 27. Molecular weight of a volatile compound Is equal to, a. its vapour density (MOE — 2010 [Ashadh]), , b. square of its vapour density, c. half of its vapour density, d. double of the value of its v:, 28, 1 g mole of hydrogen Is burne, oxygen. The weight of water formed will, 188 b. 278, d. 09g, ight of a metal whose specific, 57 and 38.21, , apour density, , d in presence of 32g of, , be, , a. (MOE - 2010), c 36g, , 29. What, Is the atomic wel, heat and equivalent weight are 0.0, , respectively? (MOE - 2009), a. 112.28 b. 76.42, c, 110.56 d. 114.63, , used for the, (MOE - 2009), , , , 30.Which of the following methods Is, determination Jf molecular welght?, a. Hydrogefdisplacement method, b. Victor Neyer’s method, c. Dulongpand Petit’s method, d, Oxide formation method, , , , uA I CPNE Orhital Chemisir’, , Scanned with CamScanner, , |

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yolume of carbon dloxide measured at STP will, 31. What rated on heating one gram of calclum, be a very strongly? (Ca = 40.0) (MoE — 2009), , carbon L b, 224mL, 112 tefl d. 1.12 liters, & 2 Ge of H and O In an organic compound Is, 32. The La 53.33% respectively, The empirical formula, 667% v pound I: (MOE - 2009), of the co b. C.H305, a, CHO d. CHoO, , ‘ ee heat of a metal is 0.093 cal/*C, then its, e SI, , 33.7h 1 (MOE — 2066 [Bangladesh embassy]), , atwt 5 b. 93, , a 93 d. 68.8, , CS o Methane in complete combustion with 32 g of, 34,16 6 gives how many g of water? <, , Oxygen" (MOE ~ 2009 [Bangladesh embassy)), , b. 36g, , 7, , aves dro's hypothesis relates (MOE - 2009), 35., , volume of a gas with its partial pressure, é mass of a gas with kinetic energy of the, ° les, ie of a gas with number of molecules, c rate of diffusion of gas with its molecular weight, d. he electrolysis of water 224 liters of pure hydrogen, ne liberated at NTP. The weight of oxygen liberated, , as (MOE ~ 2008), . 3208 b. 160g, ong d. 168, , ber of molecules in 36 mg of water is, ater (MOE - 2008[Bangladesh Embassy}), a 12x10” b, 6.02310", < 1204% 10% d. 12x10", , 38. The trivalent metal having equivalent weight 20 forms, an oxide. Then find the molecular weight of that, , , , 44, An element forms XCl,, 40s, XO, but can't form XCls., , The element may be (MOE — 2002), a oN bo, & P d.c, , 45.How many electrons are needed to balance the, equation ? XO; +H,0 +e —> XH, + OH” (MOE - 2002), , a 8 b. 6, 4 d.3, , 46.6 moles of Al acts with HCI to give how many grams of, H, (MOE- 2059), a 18g b. 9g, c 12g d. 6g, , 47. The chloride of element X neither reacts nor dissolves, in water, which element couldXbe? (MOE- 2058), a. aluminium b. carbon, c. magnesium d. silicon, 48. Part of SO, that is introduced into the atmosphere ends, up being converted into sulphuric acid. The net reaction, 15 250,(g}+0,(g)+ 2H,0(1) —s 2H;S0,(I), How much of H,SO, can be Prepared from 5.0 moles of, S02, 1.0 mole of 0, and an unlimited Quantity of H,0 2, a. 0.5 mole b. 2mole (MOE - 2058), c 15 mole d. 1mole, 49. What volume of Oxygen at STP can be formed from, 0.500 mole of potassium chlorate ? (MOE = 2058), a 168litres b. 17.8 litres, Cc. 19.8 litres d. 15.8 litres, 50.What is the Equivalent weight of KMnO, in the, following reaction?, , KMnO, + H,C04 + H,S0,—> MSO, +K;S04+ CO,, , +H,0 (MOE - 2001), a. 158 b. 52.6, c. 43.4 d. 316, , 51.If vapor density of compd. X,0 is 14, X has volume, double to that of oxygen. What Is at, wt. of X?, , (MOE - 1999), ade, (MOE - 2008) a 6 b. 8, a 56 . b 168 Gi 12 d. 14, « 81 d. 60 52. Which of the following contains smallest no. of co,, 39. The equivalent weight of KMnQ, in acidic medium is: molecules? . (MOE— 1999), a M/2 b. M/3 (MOE — 2007) a. 0.1mole b. 11.2 liter at NTP, M4 d. M/S c. 22g d. 22.4x 10° mi, {.When 8 g of H, and 8 g of O, combine; amount of 53. One ml of hydrogen gas at NTP contains about, ” water formed is: (MOE — 2006) a. 2.69 x 10"? molecules _b. 1x 10" molecules (MOE— 1998), a 98 b. 8g ©.6%10" molecules — d. 1.67 x 10% molecules, & 27g d. 45g 54.3 g carbon is completely burn in excess of oxygen. The, §1.The mass of 22.4 litres of oxygen at NTP is nearly weight of CO, formed is (Ku- 2009), a 4g b. 16g (MOE — 2006) a 32g b. 11g, & 32g d. 64g c 22g d. 44g, Excess of 2 mols/dm? HCl is treated with 2.8 g of iron 55. A compound has 87.50% nitrogen & 12.50% hydrogen, 3S shown in the reaction, Fe + HC|—=> FeCl, + Hp, the by weight The empirical formula of the compound Is, volume of HCl consumed is (MOE - 2003) a. NH b. NH; (MOE - 199), * 100cm? b. 50cm? c. NHs d. NH, 8 © 150.em? d. 50cm} : 56.1 g of ordinary sample of limestone dissolved in 16.6, The Specific heat of bivalent metal is 0.07. Its cc of 0.92 N HCI leaving some sandy residue, The, "Quivalent Welght is (MOE - 2003) percentage of pure CaCO; in sample's ....., i 20.23 b. 605 a. 38.18% b. 19.09% (MOE- 1998), ‘71 4, 90.6 c. 76.36% d. 57.27%, , , , Stoichlivtes, Scanned with CamScanner, , , , &

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57. Equal weight of N, & 0, contained in separated, Containers with same volume & temperature have, a, equal numbers of molecules (MOE - 1997), b. different number of molecules, ¢. 0) exerts more pressure then Nz, d. Nyexerts more pressure than O2, , , , 58.The hydrocarbon containing 80% carbon and an, Hydrogen is wesc (KU-2, a. Methane b, Ethane, c. Ethyne d. Ethene, , roduced from, 59. f ammonia can be pl, 9. How many moles 0 ving with nitrogen?, , 8.00 moles of hydrogen rea! 3, a anes b. 3.33 moles (MOE-2000), c. 4.33 moles dg, 5.33 moles on and 20%, 60. The hydrocarbon containing 80% car nye, 2006), Hydrocarbon is, a. Methane t onae, e |:, auth peel of atoms present in 25 g of awe :, 0) .E., — x10" b, 4.66% 10", © 2.67x10" d. 2.88x 10, 62. An organic compound burns to yield 16 g which Is 75%, then what is the theoretical yield (I.E. 2002), a. 248 b, 211g, c. 258 d. 308, , 63. What is the volume of total gas produced when 24g, of C burns in air., , C+0,—> CO; (I.€. 2002 April), a 22.41 b. 44.81, c. 89.61 d. 11.21, , 64, One Fermi Is (LE. ~ 2003), a. 10% em b. 10% cm, c 10cm d. 10% em, , 65. 2.7 g Al reacts with how many g of Oy (I.E.- 2005), a 248 b. 248, c 32g d. 16g, , 66.Under identical condition O; and N; are found In, ration of 1 : 4 (by wt.) then the no. of molecules ., , present are in ratio (1.E.- 2005), a. 7/32 b. 1/4, c 18 d. 14/32, , 67.An ore of Ag contains 13.2% of argentite Ag,S. How, many grams of the ore is required to prepare 9 g of, , pure Ag. (I.E. 2001), a. 786 - b, 119g, c. 125g d. 90g, , 68. An organic compound having vapour density 30. Its, 60 g has 24 g of carbon, 4 g of Hydrogen and rest, oxygen. The empirical formula is;, , , , [1OM-2015], a. C,H.0, b. CH,0, c. CsH.O3 d. C;H.O¢, 69. How many moles of atoms are present in, CuSO,.5H,0?, [10M-2013], 20 b. 21, 5 d. 22, , Scanned with CamScanner