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PagesHomeLabelsMOLE CONCEPT JEEPowered by Blogger. Tuesday, 4 August 2015 Mole Concept Sem 1: EXERCISE:1.A sample of ammonium phosphate (NH4)3PO4contains 6.36 mol of hydrogen atoms. The number of moles of oxygen atom in thesample : (atomic mass of N = 14.04, H = 1, P = 31, O=16)
(a) 0.265 (b) 0.795 (c) 2.12 (d)4.142.The number of sulphate ions in 1000 mL of 0.001 M H2SO4is :
(a) 6.023 1023 (b) 6.023 1022 (c) 6.023 1021 (d) 6.023 10203.30 mL of a gaseous hydrocarbon requires 90 mL of O2for complete combustion and 60 mL of CO2 is formed in the process.The molecular formula of hydrocarbon will be :
(a) C2H2 (b) CH4 (c) C2H4 (d) C2H64.A sample of mixture of CaCl2 and NaCl weighing4.22 g was treated to precipitate all the Ca as CaCO3. This CaCO3is then heated and quantitatively converted into 0.959 g of CaO. Calculate thepercentage of CaCl2 in the mixture : (Automic mass of Ca = 40, O =16, C = 12, and Cl = 35.5)
(a) 31.5% (b) 21.5% (c) 45.04% (d) 68.48%5.A metal oxide is reduced by heating it in a stream ofhydrogen. It is found that after complete reduction,3.15 g of oxide yielded1.05 g of metal. From the above data we can say that :
(a) the atomic weight of metal is 8 (b) theatomic weight of metal is 4
(c) the equivalent weight of metal is 4 (d) theequivalent weight of metal is 86.Cyclohexanol is dehydrated to cyclohexene on heating withconc. H2SO4. The cyclohexene obtained from 100 gcyclohexanol will be : (If yield of reaction is 375%)
(a) 61.5 g (b) 75.0 g (c) 20.0g (d) 41.0 g7.The composition of residual mixture will be if 30 g of Mgcombines with 30 g of oxygen :
(a) 40g MgO + 20g O2 (b) 45g MgO + 15g O2
(c) 50g MgO + 10g O2 (d) 60g MgO only8.A metal oxide has the formula A2O3. Itcan be reduced by hydrogen to give free metal and water. 0.1596 g of the metaloxide requires 6 mg of hydrogen for complete reduction. What is the atomicweight of metal?
(a) 52.3 (b) 57.5 (c) 55.8 (d)59.39.The simplest formula of a compound containing 50% of elementX (at. Wt 10) and 50% of element Y (at wt 20) is -
(a) XY (b) X2Y (c) XY2 (d)X2Y310.An organic compound has an empirical formula CH2O,its vapour density is 45. The molecular formula of the compound is.
(a) CH2O (b) C2H5O (c) C2H2O (d)C3H6O311.An oxide of metal (M) has 40% by mass of oxygen. Metal M hasrelative atomic mass of 24. The empirical formula of the oxide is.
(a) M2O (b) M2O3 (c) MO (d) M3O412.If a mixture containing 3 moles of hydrogen and 1 mole ofnitrogen is converted completely into ammonia, the ratio of initial and finalvolumes under the same temperature and pressure would be.
(a) 3: 1 (b) 1 : 3 (c) 2 : 1 (d) 1 : 213.18 g of water contains -
(a) 1 g atom of hydrogen (b) 2g atoms of hydrogen (c) 3 gatoms of hydrogen (d) None14.40 ml of H2S and 40 ml Cl2 are mixedtogether. The volume of the resulting gas at the same temperature and pressurewill be -
(a) 40 ml (b) 80 ml (c)120 ml (d) 160 ml15.How many gram atoms of S are present in 80.25 g of S.
(a) 2.5 (b) 32 (c) 5 (d) 80.25 3216.The weight of 350 ml of diatomic gas at 0 C and 2 atm pressure is 1 gm. What is the atomic weight ofthe substance.
(a) 17.7 (b) 15.99 (c) 0.05 M. NaCl (d) 6 M H+17.What will be present in the solution when 50 ml. Of 0.1 (M)HCl is mixed with 50 ml. of 0.1 (M) NaOH.
(a) 4.5 mol of H+ (b) 0.05mol of OH- (c) 40 (d) 5218.0.2 mole of HCl and 0.1 mole of barium chloride weredissolved in water to produce a 500-ml solution. The molarity of the Cl- ions is.
(a) 0.06 M (b) 0.09 M (c) 0.12 M (d) 0.80 M19.How many moles of potassium chlorate is to be heated toproduce 11.2 litre oxygen.
(a) (b) (c) (d) 20.4.4 gm of an unknown gas occupies 2.24 litre of volume ofSTP. The gas may be.
(a) Carbon dioxide (b) Carbonmonoxide (c) Oxygen (d) Sulpur dioxide21.What quantity of limestone (CaCO3) on heating willgive 56 Kg of CaO.
(a) 1000 kg (b) 10 kg (c) 50 kg (d) 100 kg22.Calculate the weight of lime (CaO) obtained by heating 200 kgof 95% pure lime stone (CaCO3).
(a) 104.0 kg (b) 105.4 kg (c) 212.8kg (d) 106.4 kg23.100 ml of PH3 when decomposes produced phosphorusand hydrogen. The change in volume is.
(a) 50 ml increase (b) 500ml decrease (c) 900 ml decrease (d) None24.A metal oxide is reduced by passing H2 gas. 3.15gm of oxide on complete reduction gives 1.05 gm. metal. We concluded that -
(a) atomic weight of metal is 4 (b) eqvivalent weight of metal is 8 (c) eqvivalent weight ofmetal is 4 (d) atomic weight ofmetal is 825.A sample of calcium carbonate is 80% pure. 25 gm of thissample is treated with excess of HCl. How much volume of CO2 will beobtained at NTP -
(a) 4.48 litre (b) 5.6 litre (c) 11.2litre (d) 2.24 litre26.What is the molarity of 36% by strength of HCl (Given sp.Gravity of pure HCl is 1.5).
(a) 16 M (b) 36 M (c) 14.79M (d) 15.88 M27.Mass of H2O in 1000 kg CuSO4. 5H2Ois.
(a) 360.5 kg (b) 36.05 kg (c) 3605kg (d) 3.605 kg28.1 gm. Metal carbonate requires 200 ml. of 0.1 N HCl forcomplete neutralization. What is the equivalent weight of metal carbonate -
(a) 50 (b) 40 (c) 20 (d) 10029.In an experiment 10 ml of AgNO3 (0.1N) solution isadded to 20 ml of decinormal HCl. After the precipitation of AgNO, excessof HCl is titrated with decinormal NaOH solution. What is the volume of NaOHused in the titration -
(a) 10 ml (b) 20 ml (c) 5 ml (d) 30ml30.The volume of water added to 50 ml. 0.5 M NaOH so that itsstrength becomes 10 mg NaOH per ml. -
(a) 100 ml (b) 200 ml (c) 250 ml (d) 500 ml31.The molarity of a solution made by mixing 50 ml of conc. H2SO4(36N)with 50 ml. of water,is
(a) 36 M (b) 18 M (c) 9M (d) 6 M32.Molarity of 720 g of pure water -
(a) 40 M (b) 4 M (c) 55.5 M (d) Unpredictable33.A certain aqueoussolution of FeCl3 (formula mass = 162) has a density of 1.1 g/ml andcontains 20.0% FeCl3. Molar concentration of this solution is -
(a) 0.028 (b) 0.163 (c) 1.35 (d) 1.4734.The density of liquid ethanol is 0.7893 g mL-1 at20 C. If 1.2 mol of ethanol are needed for a particularexperiment, what volume of ethanol should be measured out -
(a) 55 mL (b) 58 mL (c) 70 mL (d) 79 mL35.The most abundant element dissolved in sea water is Cl at aconc. of 19 gm/kg of sea water. The volume of earths ocean is 1.4 1021 litre. How many gm atoms of Cl arepotentially available from the oceans (density of sea water is 1 gm/cc) -
(a) 7.6 1020 (b) 27 1021 (c) 27 1024 (d) 96 102336.A mole of any substance is related to :
(a) number of particles (b) volumeof gaseous substances (c) mass of a substances (d) all of these37.2 g of O2 at NTP occupies the volume :
(a) 2.4 litre (b) 4.8 litre (c) 1.4litre (d) 1.2 litre38.Normally of 0.3 M H3PO4 solution is:
(a) 0.3 N (b) 0.4 N (c) 0.6N (d) 0.9 N39.The volume of 1.0 g of hydrogen in litres at NTP is :
(a) 6.8 litre (b) 10.44 litre (c) 11.2litre (d) 14.56 litre40.4 g caustic soda is dissolved in 100 cc of solution. The normality of solution is :
(a) 0.2 (b) 0.5 (c) 1.0 (d) 1.541.The vapour density of a gas A is four times than that of B.If molecular mass of B is 1, then molecular mass of A is :
(a) 1 (b) 2 (c) (d) 442.The number of atoms present in10.8 g of silver is [atomicweight of silver = 108]
(a) 6.123 x 1023 (b) 6.312x 1022 (c) 6.023 x 1022 (d) 6.076x 102343.The correct relationship between molecualr mass and vapourdensity is :
(a) V.D. = 2M (b) V.D. = M/2 (c) M = (V.D.) (d) V.D. = M244.0.30 g of a volatile liquid displaces 90.0 cm3 ofair at STP in the Victor Meyers method. The molecular mass of the liquid is :
(a) 54.44 g (b) 62.64 g (c) 68.76g (d) 74.66 g45.The specific heat of metal is 0.16. Its atomic weight is :
(a) 8 (b) 16 (c) 32 (d) 4046.A metal oxide contains 20% oxygen by weight. Its equivalentweight is :
(a) 32 (b) 40 (c) 64 (d) 7247.From the complete decomposition of 20 g CaCO3 atSTP the volume of CO2 obtained is :
(a) 2.24 litre (b) 4.48 litre (c) 20litre (d) 22.4 litre48.One mole of a substance present in 1 kg of solvent. Thecorrect statement regarding above solution is :
(a) strength g/g (b) molar concentration (c) molalconcentration (d) normality49.0.25 mol of P4 molecules contains atoms :
(a) 1.764 (b) 3.448 (c) 6.023 x 1023 (d) 8.086 x 102350.800 g of a 40% solution by weight was cooled. 100 g of soluteprecipitated. The percentage composition of remaining solution is :
(a) 31.4% (b) 55.6% (c) 67.8% (d) 69.9%

ANSWER KEY : QUE. 1 2 3 4 5 6 7 8 9 10 ANS. c d c c c a c c b d QUE. 11 12 13 14 15 16 17 18 19 20 ANS. c c b b a b c d b a QUE. 21 22 23 24 25 26 27 28 29 30 ANS. d d a c a c a a a d QUE. 31 32 33 34 35 36 37 38 39 40 ANS. c c c c a d c d c c QUE. 41 42 43 44 45 46 47 48 49 50 ANS. d c b d b a b c c aPosted byPankaj Chaudharyat23:050commentsLabels:MOLE CONCEPT JEE Older PostsHomeSubscribe to:Posts (Atom)Get in TouchDOUBT SOLVE AND CONTACT PAGECHEMISTRY ZONE APPTHE CHEMISTRY ZONE APPLabelsMOLE CONCEPT JEEPopular PostsMole Concept Sem 1 : EXERCISE : 1. A sample of ammonium phosphate (NH 4 ) 3 PO 4 contains 6.36 mol of hydrogen atoms. The number of moles of oxy...(no title) HELLO FRIENDS... WELCOME TO THE CHEMISTRY ZONE - A PLACE WHICH TRIES TO MAKE A STUDENTS WORK EASIER THIS SITE WILL HELP YOU THROUGH YOU...Blog Archive2015(2)August(1)Mole Concept Sem 1 July(1)NEWSDOWNLOAD THE CHEMISTRY ZONE APP FOR ANDROID USERSAbout MePankaj ChaudharyView my complete profile Copyright The Chemistry Zone.

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