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To check the principle of multiple proportions, a series of pure binary compounds $\left(\mathrm{P}_{\mathrm{m}} \mathr... JEE Advanced 2022 Paper 2 Online ## Numerical More The treatment of an aqueous solution of$3.74 \mathrm{~g}$of$\mathrm{Cu}\left(\mathrm{NO}_{3}\right)_{2}$with excess ... JEE Advanced 2022 Paper 1 Online 5.00 mL of 0.10 M oxalic acid solution taken in a conical flask is titrated against NaOH from a burette using phenolphth... JEE Advanced 2020 Paper 1 Offline In the chemical reaction between stoichiometric quantities of KMnO4 and KI in weakly basic solution, what is the number ... JEE Advanced 2020 Paper 2 Offline The amount of water produced (in g) in the oxidation of 1 mole of rhombic sulphur by conc. HNO3 to a compound with the h... JEE Advanced 2019 Paper 2 Offline The mole fraction of urea in an aqueous urea solution containing 900 g of water is 0.05. If the density of the solution ... JEE Advanced 2019 Paper 2 Offline To measure the quantity of $$MnC{l_2}$$ dissolved in an aqueous solution, it was completely converted to $$KMn{O_4}$$ u... JEE Advanced 2018 Paper 2 Offline If the value of Avogadro number is 6.023 $$\times$$ 1023 mol-1 and the value of Boltzmann constant is 1.380 $$\times$$ 1... JEE Advanced 2014 Paper 1 Offline 29.2 % (w/w) HCl stock solution has density of 1.25 g mL -1 . The molecular weight of HCl is 36.5 g mol -1 . The volume ... IIT-JEE 2012 Paper 1 Offline A student performs a titration with different burettes and finds titre values of 25.2 mL, 25.25 mL, and 25.0 mL. The num... IIT-JEE 2010 Paper 1 Offline Silver (atomic weight = 108 g mol-1) has a density of 10.5 g.cm-3. The number of silver atoms on a surface of area 10-12... IIT-JEE 2010 Paper 2 Offline 2.68 $$\times$$ 10-3 moles of a solution containing an ion An+ require 1.61 $$\times$$ 10-3 moles of $$MnO_4^-$$ for the... IIT-JEE 1984 ## MCQ (Single Correct Answer) More Dissolving 120 g of urea (mol. wt. 60) in 1000 g of water gave a solution of density 1.15 g/mL. The molarity of the solu... IIT-JEE 2011 Paper 1 Offline Consider a titration of potassium dichromate solution with acidified Mohr’s salt solution using diphenylamine as indicat... IIT-JEE 2007 The pair of compounds having metals in their highest oxidation state is IIT-JEE 2004 Screening Mixture X = 0.02 mol of [Co(NH3)5SO4]Br and 0.02 mol of [Co(NH3)5Br]SO4 was prepared in 2 litre of solution. 1 litre of ... IIT-JEE 2003 Screening Which has maximum number of atoms? IIT-JEE 2003 Screening How many moles of electron weigh one kilogram? IIT-JEE 2002 Screening In the standardization of Na2S2O3 using K2Cr2O7 by iodometry, the equivalent weight of K2Cr2O7 is: ... IIT-JEE 2001 Screening An aqueous solution of 6.3 g oxalic acid dehydrate is made up to 250ml. the volume of 0.1N NaOH required to completely n... IIT-JEE 2001 Screening The reaction, $$3Cl{O^ - }(aq)$$$$\to ClO_3^ - (aq) + 2C{l^ - }(aq)$$ is an example of : IIT-JEE 2001 Screening Amongst the following identify the species with an atom in +6 oxidation state IIT-JEE 2000 Screening The oxidation number of sulphur in S8,S2F2,H2S respectively, are IIT-JEE 1999 The normality of 0.3 M phosphorus acid (H3PO3) is IIT-JEE 1999 For the redox reaction: $$MnO_4^ - + {C_2}O_4^{ - 2} + {H^ + }$$ $$\to M{n^{2 + }} + C{O_2} + {H_2}O$$ The correct coe... IIT-JEE 1992 Read the following statement and explanation and answer as per the options given below: STATEMENT (S): In the titration ... IIT-JEE 1991 The oxidation state of the most electronegative element in the products of the reaction. BaO2 with dil. H2SO4 are... IIT-JEE 1991 The oxidation number of phosphorus in Ba(H2PO2) is : IIT-JEE 1990 In which mode of expression, the concentration of a solution remains independent of temperature? IIT-JEE 1988 The equivalent weight of MnSO4 is half of its molecular weight, when it converts to IIT-JEE 1988 The brown ring complex compound is formulated as [Fe(H2O)5(NO)+]SO4. The oxidation state of iron is... IIT-JEE 1987 A molal solution is one that contains one mole of solute in IIT-JEE 1986 The oxidation number of carbon in CH2O is IIT-JEE 1982 1 mole of N2H4 loses 10 moles of electrons to form a new compound Y. assuming that all nitrogen appears in the new compo... IIT-JEE 1981 If 0.50 mol of BaCl2 is mixed with 0.20 mol of Na3PO4, the maximum amount of Ba3(PO4)2 that can be formed is ... IIT-JEE 1981 M is molecular weight of KMnO4. The equivalent wight of KMnO4 when it is converted into K2MnO4 is... IIT-JEE 1980 The total number of electrons is one molecule of carbon dioxide is IIT-JEE 1979 A gaseous mixture contains oxygen and nitrogen in the ratio of 1 : 4 by weight. Therefore the ratio of their no of molec... IIT-JEE 1979 2.76 g of silver carbonate on being strongly heated yields a residue weighing IIT-JEE 1979 The largest number of molecules is in IIT-JEE 1979 A compound was found to contain nitrogen and oxygen in the ratio 28 gm and 80 gm respectively. The formula of compound i... IIT-JEE 1978 27 g of Al will react completely with how many grams if oxygen? IIT-JEE 1978 ## Subjective More Calculate the molarity of water if it's density is 1000 kg/m3 IIT-JEE 2003 Hydrogen peroxide solution (20 ml) reacts quantitatively with a solution of KMnO4 solution is just decolourised by 10 ml... IIT-JEE 2001 A plant virus is found to consist of uniform cylindrical particles of 150 Å in diameter and 5000 Å long. The specific vo... IIT-JEE 1999 How many millilitres of 0.5 M H2SO4 are needed to dissolve 0.5 g of copper(II) carbonate? IIT-JEE 1999 An aqueous solution containing 0.10 g KIO3 (formula weight = 214.0) was treated with an excess of KI solution. The solut... IIT-JEE 1998 A 3.00 g sample containing Fe3O4, Fe2O3 and an inert impure substance is treated with excess of KI solution in presence ... IIT-JEE 1996 8.0575 $$\times$$ 10-2 kg of Glauber's salt is dissolved in water to obtain 1 dm3 of a solution of density 1077.2 kg.m-3... IIT-JEE 1994 The composition of a sample of Wustite is Fe0.93O1.00 what percentage of the iron is present in the form of Fe(III)?... IIT-JEE 1994 Upon mixing 45.0 ml. of 0.25 M lead nitrate solution with 25.0 ml. of 0.10M chromic sulphate solution, precipitation of ... IIT-JEE 1993 One gram of commercial AgNO3 is dissolved in 50 ml. of water. It is treated with 50 ml. of a KI solution. The silver iod... IIT-JEE 1992 A 2.0 g sample of a mixture containing sodium carbonate, sodium bicarbonate and sodium suplphate is gently heated till t... IIT-JEE 1992 A solution of 0.2 g of a compound containing Cu2+ and $$C_2O_4^{2-}$$ ions on titration with 0.02M $$KMnO_4$$ in presenc... IIT-JEE 1991 A 1.0 g sample of Fe2O3 solid of 55.2% purity is dissolved in acid and reduced by heating the solution with zinc dust. T... IIT-JEE 1991 Calculate the molality of 1 litre solution of 93% H2SO4 (weight/volume). The density of the solution is 1.84 g/ml... IIT-JEE 1990 A solid mixture (5.0 g) consisting of lead nitrate and sodium nitrate was headed below 600oC until the weight of the res... IIT-JEE 1990 A mixture of H2C2O4 (oxalic acid) and NaHC2O4 weighing 2.02 g was dissolved in water and solution made upto one litre. T... IIT-JEE 1990 An equal volume of a reducing agent is titrated separately with 1M KMnO4 in acid neutral and alkaline media. The volume... IIT-JEE 1989 A sample of hydrazine sulphate (N2H6SO4) was dissolved in 100 ml. of water, 10 ml of this solution was reacted with exce... IIT-JEE 1988 A sugar syrup of weight 214.2 g contains 34.2 g of sugar (C12H22O11). Calculate (i) molal concentration and (ii) mole fr... IIT-JEE 1988 (i) What is the weight of sodium bromate and molarity pf solution necessary to prepare 85.5 ml of 0.672 B solution when ... IIT-JEE 1987 Arrange the following in increasing oxidation number of iodine. I2, HI, HIO4, ICl IIT-JEE 1986 Complete and balance the following equation: $$ClO_3^-$$ + I- + H2SO4 $$\to$$ Cl- + $$HSO_4^-$$... IIT-JEE 1986 Complete and balance the following equation: Mn2+ + PbO2 $$\to$$ $$MnO_4^-$$ + H2O ... IIT-JEE 1986 Complete and balance the following equation: Ag+ + AsH3 $$\to$$ H3AsO3 + H+ ... IIT-JEE 1986 Complete and balance the following equation: S + OH- $$\to$$ S2- + $$S_2O_3^-$$ IIT-JEE 1986 Five ml of 8N nitric acid, 4.8ml of 5N hydrochloric acid and a certain volume of 17M sulphuric acid are mixed together a... IIT-JEE 1985 Complete and balance the following equations: Cl2 + OH- $$\to$$ Cl- + ClO- ... IIT-JEE 1983 Complete and balance the following equation: HNO3 + HCl $$\to$$ NO + Cl2 IIT-JEE 1983 Complete and balance the following equation: Zn + $$NO_3^- \to$$ Zn2+ + $$NH_4^+$$ IIT-JEE 1983 4.08 g of a mixture of BaO and an unknown carbonate MCO3 was heated strongly. The residue weighed 3.64 g. This was disso... IIT-JEE 1983 Complete and balance the following equation: $$Cr_2O_7^{2-}$$ + C2H4O $$\to$$ C2H4O2 + Cr3+... IIT-JEE 1983 Complete and balance the following equation: Ce3+ + $$S_2O_8^{-2} \to$$ $$SO_4^{-2}$$ + Ce4+... IIT-JEE 1983 The density of a 3 M Sodium thiosulphate solution (Na2S2O3) is 1.25 g per ml. Calculate (i) the percentage by weight of ... IIT-JEE 1983 Hydroxylamine reduces iron (III) according to the equation: 2NH2OH + 4Fe3+ $$\to$$ N2O(g) $$\uparrow$$ + H2O + 4Fe2+ ... IIT-JEE 1982 A 1.00 gm sample of H2O2 solution containing X percent H2O2 by weight requires X ml of a KMnO4 solution for complete ox... IIT-JEE 1981 Balance the following Equations: (i) Cu2O + H+ + $$NO_3^ - \to$$ Cu2+ + NO + H2O (ii) K4[Fe(CN)6] + H2SO4 + H2O $$\to... IIT-JEE 1981 (a) 1 litre of a mixture of CO and CO2 is taken. This mixture is passed through a tube containing red hot charcoal. The... IIT-JEE 1980 (i). A sample of MnSO4.4H2O is strongly heated in air. The residue is Mn3O4. (ii). The residue is dissolved in 100 ml of... IIT-JEE 1980 (a) One litre of a sample of hard water contains 1 mg of CaCl2 and 1 mg of MgCl2. Find the total hardness in terms of pa... IIT-JEE 1980 A mixture contains NaCl and unknown chloride MCl. (i) 1g of this is dissolved in water. Excess of acidified AgNO3 soluti... IIT-JEE 1980 Find (i) The total number of neutrons and (ii) The total mass of neutron in 7 mg of 14C (Assume that mass of neutron = ... IIT-JEE 1980 A hydrocarbon contains 10.5 g of carbon per gram of hydrogen. 1 litre of the hydrocarbon at 127oC and 1 atmosphere weigh... IIT-JEE 1980 Account for the following : Limit your answer to two sentences. "Atomic weights of most of the elements are fractional."... IIT-JEE 1979 In the analysis of 0.5 g sample feldspar, a mixture of chlorides of sodium and potassium is obtained which weighs 0.1180... IIT-JEE 1979 5 ml of a gas containing only carbon and hydrogen were mixed with an excess of oxygen (30 ml) and the mixture exploded b... IIT-JEE 1979 (a). 5.5 g of a mixture FeSO4.7H2O and Fe2(SO4)3.9H2O requires 5.4 ml of 0.1 N KMnO4 solution for complete oxidation. Ca... IIT-JEE 1979 4.215 g of a metallic carbonate was heated in a hard glass tube and the CO2 evolved was found to measure 1336 ml at 27oC... IIT-JEE 1979 Naturally occurring boron consists of two isotopes whose atomic weighs are 10.01 and 11.01. The atomic weight of natural... IIT-JEE 1978 Igniting MnO2 converts it quantitatively to Mn3O4. A sample of pyrolusite is of the following composition : MnO2 80%, Si... IIT-JEE 1978 One gram of an alloy of aluminium and magnetism when treated with excess of dil. HCl forms magnesium chloride, aluminiu... IIT-JEE 1978 What weight of AgCl will be precipitated when a solution containing 4.77 g of NaCl is added to a solution of 5.77g of Ag... IIT-JEE 1978 ## Fill in the Blanks More The compound YBa2Cu3O7, which shows superconductivity, has copper in oxidation state ______ assume that the rare earth ... IIT-JEE 1994 The weight of$$1 \times 10^{22}$\$ molecules of CuSO4.5H2O is ____.
IIT-JEE 1991
3 g of a salt of molecular weight 30 is dissolved in 250 g of water. The molality if the solution is _____.
IIT-JEE 1983
The total no of electron present in 18 ml of water is ______.
IIT-JEE 1980
The modern atomic unit is based on the mass of ______.
IIT-JEE 1980

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