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JEE Main

Some Basic Concepts of Chemistry

Chemistry

Previous Years Questions

Numerical

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A 1.84 mg sample of polyhydric alcoholic compound 'X' of molar mass 92.0 g/mol gave 1.344 mL of $$\mathrm{H}_{2}$$ gas a...
JEE Main 2022 (Online) 29th July Evening Shift
2L of 0.2M H2SO4 is reacted with 2L of 0.1M NaOH solution, the molarity of the resulting product Na2SO4 in the solution ...
JEE Main 2022 (Online) 28th July Evening Shift
On complete combustion of $$0.492 \mathrm{~g}$$ of an organic compound containing $$\mathrm{C}, \mathrm{H}$$ and $$\math...
JEE Main 2022 (Online) 28th July Morning Shift
In the given reaction, $$X+Y+3 Z \leftrightarrows X Y_{3}$$ if one mole of each of $$X$$ and $$Y$$ with $$0.05 \mathrm{~...
JEE Main 2022 (Online) 28th July Morning Shift
$$20 \mathrm{~mL}$$ of $$0.02 \,\mathrm{M} \,\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}$$ solution is used for the ti...
JEE Main 2022 (Online) 27th July Morning Shift
A $$100 \mathrm{~mL}$$ solution of $$\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{MgBr}$$ on treatment with methanol produces...
JEE Main 2022 (Online) 26th July Evening Shift
$$20 \mathrm{~mL}$$ of $$0.02\, \mathrm{M}$$ hypo solution is used for the titration of $$10 \mathrm{~mL}$$ of copper su...
JEE Main 2022 (Online) 26th July Evening Shift
When 800 mL of 0.5 M nitric acid is heated in a beaker, its volume is reduced to half and 11.5 g of nitric acid is evapo...
JEE Main 2022 (Online) 26th July Morning Shift
Chlorophyll extracted from the crushed green leaves was dissolved in water to make $$2 \mathrm{~L}$$ solution of Mg of c...
JEE Main 2022 (Online) 26th July Morning Shift
A sample of 4.5 mg of an unknown monohydric alcohol, R-OH was added to methylmagnesium iodide. A gas is evolved and is c...
JEE Main 2022 (Online) 25th July Evening Shift
56.0 L of nitrogen gas is mixed with excess hydrogen gas and it is found that 20 L of ammonia gas is produced. The volum...
JEE Main 2022 (Online) 25th July Evening Shift
A 0.166 g sample of an organic compound was digested with conc. H2SO4 and then distilled with NaOH. The ammonia gas evol...
JEE Main 2022 (Online) 24th June Morning Shift
0.2 g of an organic compound was subjected to estimation of nitrogen by Dumas method in which volume of N2 evolved (at S...
JEE Main 2022 (Online) 24th June Evening Shift
Number of grams of bromine that will completely react with 5.0 g of pent-1-ene is ___________ $$\times$$ 10$$-$$2 g. (At...
JEE Main 2022 (Online) 25th June Morning Shift
1 L aqueous solution of H2SO4 contains 0.02 m mol H2SO4. 50% of this solution is diluted with deionized water to give 1 ...
JEE Main 2022 (Online) 25th June Morning Shift
The number of N atoms in 681 g of C7H5N3O6 is x $$\times$$ 1021. The value of x is (NA = 6.02 $$\times$$ 1023 mol$$-$$1)...
JEE Main 2022 (Online) 25th June Morning Shift
A protein 'A' contains 0.30% of glycine (molecular weight 75). The minimum molar mass of the protein 'A' is __________ $...
JEE Main 2022 (Online) 25th June Evening Shift
The moles of methane required to produce 81 g of water after complete combustion is _____________ $$\times$$ 10$$-$$2 mo...
JEE Main 2022 (Online) 26th June Evening Shift
CNG is an important transportation fuel. When 100 g CNG is mixed with 208 g oxygen in vehicles, it leads to the formatio...
JEE Main 2022 (Online) 26th June Evening Shift
Two elements A and B which form 0.15 moles of A2B and AB3 type compounds. If both A2B and AB3 weigh equally, then the at...
JEE Main 2022 (Online) 27th June Morning Shift
116 g of a substance upon dissociation reaction, yields 7.5 g of hydrogen, 60 g of oxygen and 48.5 g of carbon. Given th...
JEE Main 2022 (Online) 27th June Evening Shift
In the estimation of bromine, 0.5 g of an organic compound gave 0.40 g of silver bromide. The percentage of bromine in t...
JEE Main 2022 (Online) 28th June Morning Shift
A 2.0 g sample containing MnO2 is treated with HCl liberating Cl2. The Cl2 gas is passed into a solution of KI and 60.0 ...
JEE Main 2022 (Online) 28th June Morning Shift
The complete combustion of 0.492 g of an organic compound containing 'C', 'H' and 'O' gives 0.793 g of CO2 and 0.442 g o...
JEE Main 2022 (Online) 28th June Evening Shift
If 80 g of copper sulphate CuSO4 . 5H2O is dissolved in deionised water to make 5L of solution. The concentration of the...
JEE Main 2021 (Online) 1st September Evening Shift
The number of atoms in 8g of sodium is x $$\times$$ 1023. The value of x is ____________. (Nearest integer)[Given : NA =...
JEE Main 2021 (Online) 1st September Evening Shift
Sodium oxide reacts with water to produce sodium hydroxide. 20.0 g of sodium oxide is dissolved in 500 mL of water. Negl...
JEE Main 2021 (Online) 31st August Evening Shift
The molarity of the solution prepared by dissolving 6.3 g of oxalic acid (H2C2O4.2H2O) in 250 mL of water in mol L$$-$$1...
JEE Main 2021 (Online) 31st August Morning Shift
100 g of propane is completely reacted with 1000 g of oxygen. The mole fraction of carbon dioxide in the resulting mixtu...
JEE Main 2021 (Online) 27th August Evening Shift
When 10 mL of an aqueous solution of KMnO4 was titrated in acidic medium, equal volume of 0.1 M of an aqueous solution o...
JEE Main 2021 (Online) 27th August Morning Shift
In Carius method for estimation of halogens, 0.2 g of an organic compound gave 0.188 g of AgBr. The percentage of bromin...
JEE Main 2021 (Online) 27th August Morning Shift
A chloro compound "A".(i) forms aldehydes on ozonolysis followed by the hydrolysis.(ii) when vaporized completely 1.53 g...
JEE Main 2021 (Online) 26th August Evening Shift
100 mL of Na3PO4 solution contains 3.45 g of sodium. The molarity of the solution is _____________ $$\times$$ 10$$-$$2 m...
JEE Main 2021 (Online) 26th August Evening Shift
In the sulphur estimation, 0.471 g of an organic compound gave 1.44 g of barium sulphate. The percentage of sulphur in t...
JEE Main 2021 (Online) 26th August Evening Shift
An aqueous KCl solution of density 1.20 g mL$$-$$1 has a molality of 3.30 mol kg$$-$$1. The molarity of the solution in ...
JEE Main 2021 (Online) 26th August Morning Shift
10.0 mL of 0.05 M KMnO4 solution was consumed in a titration with 10.0 mL of given oxalic acid dihydrate solution. The s...
JEE Main 2021 (Online) 27th July Evening Shift
An organic compound is subjected to chlorination to get compound A using 5.0 g of chlorine. When 0.5 g of compound A is ...
JEE Main 2021 (Online) 27th July Morning Shift
The density of NaOH solution is 1.2 g cm$$-$$3. The molality of this solution is _____________ m. (Round off to the Near...
JEE Main 2021 (Online) 27th July Morning Shift
0.8 g of an organic compound was analyzed by Kjeldahl's method for the estimation of nitrogen. If the percentage of nitr...
JEE Main 2021 (Online) 25th July Evening Shift
The number of significant figures in 0.00340 is ____________.
JEE Main 2021 (Online) 25th July Evening Shift
Consider the complete combustion of butane, the amount of butane utilized to produce 72.0 g of water is ___________ $$\t...
JEE Main 2021 (Online) 25th July Morning Shift
When 10 mL of an aqueous solution of Fe2+ ions was titrated in the presence of dil H2SO4 using diphenylamine indicator, ...
JEE Main 2021 (Online) 25th July Morning Shift
If the concentration of glucose (C6H12O6) in blood is 0.72 g L$$-$$1, the molarity of glucose in blood is ____________ $...
JEE Main 2021 (Online) 22th July Evening Shift
Methylation of 10 g of benzene gave 9.2 g of toluene. Calculate the percentage yield of toluene __________. (Nearest int...
JEE Main 2021 (Online) 22th July Evening Shift
When 0.15 g of an organic compound was analyzed using Carius method for estimation of bromine, 0.2397 g of AgBr was obta...
JEE Main 2021 (Online) 20th July Evening Shift
4g equimolar mixture of NaOH and Na2CO3 contains x g of NaOH and y g of Na2CO3. The value of x is ____________ g. (Neare...
JEE Main 2021 (Online) 20th July Evening Shift
An average person needs about 10000 kJ energy per day. The amount of glucose (molar mass = 180.0 g mol$$-$$1) needed to ...
JEE Main 2021 (Online) 20th July Morning Shift
250 mL of 0.5 M NaOH was added to 500 mL of 1 M HCl. The number of unreacted HCl molecules in the solution after complet...
JEE Main 2021 (Online) 20th July Morning Shift
10.0 mL of Na2CO3 solution is titrated against 0.2 M HCl solution. The following titre values were obtained in 5 reading...
JEE Main 2021 (Online) 18th March Evening Shift
Complete combustion of 3g of ethane gives x $$\times$$ 1022 molecules of water. The value of x is __________. (Round off...
JEE Main 2021 (Online) 18th March Morning Shift
A reaction of 0.1 mole of Benzylamine with bromomethane gave 23 g of Benzyl trimethyl ammonium bromide. The number of mo...
JEE Main 2021 (Online) 18th March Morning Shift
__________ grams of 3-Hydroxy propanal (MW = 74) must be dehydrated to produce 7.8 g of acrolein (MW = 56) (C3H4O) if th...
JEE Main 2021 (Online) 18th March Morning Shift
Consider the above reaction. The percentage yield of amide product is __________. (Round off to the Nearest Integer).(Gi...
JEE Main 2021 (Online) 17th March Evening Shift
The mole fraction of a solute in a 100 molal aqueous solution is ___________ $$\times$$ 10$$-$$2. (Round off to the Near...
JEE Main 2021 (Online) 17th March Morning Shift
In the above reaction, 3.9 g of benzene on nitration gives 4.92 g of nitrobenzene. The percentage yield of nitrobenzene ...
JEE Main 2021 (Online) 17th March Morning Shift
15 mL of aqueous solution of Fe2+ in acidic medium completely reacted with 20 mL of 0.3 M aqueous Cr2O$$_7^{2 - }$$. The...
JEE Main 2021 (Online) 17th March Morning Shift
When 35 mL of 0.15 M lead nitrate solution is mixed with 20 mL of 0.12 M chromic sulphate solution, _________ $$\times$$...
JEE Main 2021 (Online) 16th March Evening Shift
$$2MnO_4^ - + b{C_2}O_4^{2 - } + c{H^ + } \to xM{n^{2 + }} + yC{O_2} + z{H_2}O$$If the above equation is balanced with ...
JEE Main 2021 (Online) 16th March Morning Shift
Complete combustion of 750 g of an organic compound provides 420 g of CO2 and 210 g of H2O. The percentage composition o...
JEE Main 2021 (Online) 16th March Morning Shift
The NaNO3 weighed out to make 50 mL of an aqueous solution containing 70.0 mg Na+ per mL is _________ g. (Rounded off to...
JEE Main 2021 (Online) 26th February Evening Shift
The number of significant figures in 50000.020 $$\times$$ 10$$-$$3 is _____________.
JEE Main 2021 (Online) 26th February Morning Shift
In basic medium $$Cr{O_4}^{2 - }$$ oxidises $${S_2}{O_3}^{2 - }$$ to form $$S{O_4}^{2 - }$$ and itself changes into $$Cr...
JEE Main 2021 (Online) 25th February Morning Slot
The formula of a gaseous hydrocarbon which requires 6 times of its own volume of O2 for complete oxidation and produces ...
JEE Main 2021 (Online) 24th February Evening Slot
4.5 g of compound A (MW = 90) was used to make 250 mL of its aqueous solution. The molarity of the solution in M is x $$...
JEE Main 2021 (Online) 24th February Morning Slot
In an estimation of bromine by Carius method, 1.6 g of an organic compound gave 1.88 g of AgBr. The mass percentage of b...
JEE Main 2020 (Online) 6th September Morning Slot
The minimum number of moles of O2 required for complete combustion of 1 mole of propane and 2 moles of butane is _____....
JEE Main 2020 (Online) 5th September Morning Slot
Consider the following equations : 2Fe2+ + H2O2 $$ \to $$ xA + yB (in basic medium) 2MnO4- + 6H+ + 5H2O2 $$ \to $$ x'C...
JEE Main 2020 (Online) 4th September Evening Slot
A 20.0 mL solution containing 0.2 g impure H2O2 reacts completely with 0.316 g of KMnO4 in acid solution. The purity of ...
JEE Main 2020 (Online) 4th September Morning Slot
The mass of ammonia in grams produced when 2.8 kg of dinitrogen quantitatively reacts with 1 kg of dihydrogen is _______...
JEE Main 2020 (Online) 4th September Morning Slot
6.023 $$ \times $$ 1022 molecules are present in 10 g of a substance 'x'. The molarity of a solution containing 5 g of s...
JEE Main 2020 (Online) 3rd September Evening Slot
The volume (in mL) of 0.1 N NaOH required to neutralise 10 mL of 0.1 N phosphinic acid is ___________.
JEE Main 2020 (Online) 3rd September Evening Slot
The volume strength of 8.9 M H2O2 solution calculated at 273 K and 1 atm is ______. (R = 0.0821 L atm K-1 mol-1) (round...
JEE Main 2020 (Online) 3rd September Morning Slot
The mole fraction of glucose (C6H12O6 ) in an aqueous binary solution is 0.1. The mass percentage of water in it, to the...
JEE Main 2020 (Online) 3rd September Morning Slot
The ratio of the mass percentages of ‘C & H’ and ‘C & O’ of a saturated acyclic organic compound ‘X’ are 4 : 1 a...
JEE Main 2020 (Online) 2nd September Evening Slot
The oxidation states of transition metal atoms in K2Cr2O7, KMnO4 and K2FeO4, respectively, are x, y and z. The sum of x,...
JEE Main 2020 (Online) 2nd September Evening Slot
The molarity of HNO3 in a sample which has density 1.4 g/mL and mass percentage of 63% is _____. (Molecular Weight of H...
JEE Main 2020 (Online) 9th January Morning Slot
The hardness of a water sample containing 10–3 M MgSO4 expressed as CaCO3 equivalents (in ppm) is ______. (molar mass of...
JEE Main 2020 (Online) 9th January Morning Slot
Ferrous sulphate heptahydrate is used to fortify foods with iron. The amount (in grams) of the salt required to achieve ...
JEE Main 2020 (Online) 8th January Morning Slot
The volume (in mL) of 0.125 M AgNO3 required to quantitatively precipitate chloride ions in 0.3 g of [Co(NH3)6]Cl3 is __...
JEE Main 2020 (Online) 8th January Morning Slot
The flocculation value of HCl for arsenic sulphide sol. is 30 m mol L-1 If H2SO4 is used for the flocculatiopn of arseni...
JEE Main 2020 (Online) 7th January Evening Slot

MCQ (Single Correct Answer)

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Consider the reaction $$4 \mathrm{HNO}_{3}(1)+3 \mathrm{KCl}(\mathrm{s}) \rightarrow \mathrm{Cl}_{2}(\mathrm{~g})+\mathr...
JEE Main 2022 (Online) 29th July Evening Shift
$$ \mathrm{N}_{2(\mathrm{~g})}+3 \mathrm{H}_{2(\mathrm{~g})} \rightleftharpoons 2 \mathrm{NH}_{3(\mathrm{~g})} $$ $$20 \...
JEE Main 2022 (Online) 29th July Morning Shift
In Carius method of estimation of halogen, $$0.45 \mathrm{~g}$$ of an organic compound gave $$0.36 \mathrm{~g}$$ of $$\m...
JEE Main 2022 (Online) 27th July Morning Shift
$$250 \mathrm{~g}$$ solution of $$\mathrm{D}$$-glucose in water contains $$10.8 \%$$ of carbon by weight. The molality o...
JEE Main 2022 (Online) 27th July Morning Shift
Hemoglobin contains $$0.34 \%$$ of iron by mass. The number of Fe atoms in $$3.3 \mathrm{~g}$$ of hemoglobin is (Given: ...
JEE Main 2022 (Online) 26th July Evening Shift
$$\mathrm{SO}_{2} \mathrm{Cl}_{2}$$ on reaction with excess of water results into acidic mixture $$\mathrm{SO}_{2} \mat...
JEE Main 2022 (Online) 25th July Morning Shift
If a rocket runs on a fuel (C15H30) and liquid oxygen, the weight of oxygen required and CO2 released for every litre of...
JEE Main 2022 (Online) 24th June Morning Shift
120 g of an organic compound that contains only carbon and hydrogen gives 330 g of CO2 and 270 g of water on complete co...
JEE Main 2022 (Online) 24th June Evening Shift
A commercially sold conc. HCl is 35% HCl by mass. If the density of this commercial acid is 1.46 g/mL, the molarity of t...
JEE Main 2022 (Online) 26th June Morning Shift
Compound A contains 8.7% Hydrogen, 74% Carbon and 17.3% Nitrogen. The molecular formula of the compound is, Given : Atom...
JEE Main 2022 (Online) 28th June Evening Shift
Using the rules for significant figures, the correct answer for the expression $${{0.02858 \times 0.112} \over {0.5702}}...
JEE Main 2022 (Online) 29th June Evening Shift
Production of iron in blast furnace follows the following equation Fe3O4(s) + 4CO(g) $$\to$$ 3Fe(l) + 4CO2(g) when 4.640...
JEE Main 2022 (Online) 29th June Morning Shift
Fex2 and Fey3 are known when x and y are :
JEE Main 2021 (Online) 16th March Evening Shift
Complete combustion of 1.80 g of an oxygen containing compound (CxHyOz) gave 2.64 g of CO2 and 1.08 g of H2O. The percen...
JEE Main 2021 (Online) 25th February Morning Slot
The average molar mass of chlorine is 35.5 g mol–1. The ratio of 35Cl to 37Cl in naturally occuring chlorine is close to...
JEE Main 2020 (Online) 6th September Evening Slot
The ammonia (NH3) released on quantiative reaction of 0.6 g urea (NH2CONH2) with sodium hydroxide (NaOH) can be neutrali...
JEE Main 2020 (Online) 7th January Evening Slot
Amongst the following statements, that which was not proposed by Dalton was :
JEE Main 2020 (Online) 7th January Morning Slot
Thermal decomposition of a Mn compound (X) at 513 K results in compound Y, MnO2 and gaseous product. MnO2 reacts with Na...
JEE Main 2019 (Online) 12th April Evening Slot
25 g of an unknown hydrocarbon upon burning produces 88 g of CO2 and 9 g of H2O. This unknown hydrocarbon contains :...
JEE Main 2019 (Online) 12th April Evening Slot
5 moles of AB2 weigh 125 × 10–3 kg and 10 moles of A2B2 weigh 300 × 10–3 kg. The molar mass of A (MA) and molar mass o...
JEE Main 2019 (Online) 12th April Morning Slot
The minimum amount of O2(g) consumed per gram of reactant is for the reaction : (Given atomic mass : Fe = 56, O = 16, Mg...
JEE Main 2019 (Online) 10th April Evening Slot
At 300 K and 1 atmospheric pressure, 10 mL of a hydrocarbon required 55 mL of O2 for complete combustion, and 40 mL of C...
JEE Main 2019 (Online) 10th April Morning Slot
What would be the molality of 20% (mass/ mass) aqueous solution of KI? (molar mass of KI = 166 g mol–1)
JEE Main 2019 (Online) 9th April Evening Slot
For a reaction, N2(g) + 3H2(g) $$ \to $$ 2NH3(g) ; identify dihydrogen (H2) as a limiting reagent in the following react...
JEE Main 2019 (Online) 9th April Morning Slot
The correct order of the oxidation states of nitrogen in NO, N2O, NO2 and N2O3 is :...
JEE Main 2019 (Online) 9th April Morning Slot
The percentage composition of carbon by mole in methane is :
JEE Main 2019 (Online) 8th April Evening Slot
8 g of NaOH is dissolved in 18g of H2O. Mole fraction of NaOH in solution and molality (in mol kg–1) of the solution res...
JEE Main 2019 (Online) 12th January Evening Slot
50 mL of 0.5 M oxalic acid is needed to neutralize 25 mL of sodium hydroxide solution. The amount of NaOH in 50 mL of th...
JEE Main 2019 (Online) 12th January Morning Slot
25 ml of the given HCl solution requires 30 mL of 0.1 M sodium carbonate solution. What is the volume of this HCl soluti...
JEE Main 2019 (Online) 11th January Evening Slot
An organic compound is estimated through Duma's method and was found to evolve 6 moles of CO2. 4 moles of H2O and 1 mole...
JEE Main 2019 (Online) 11th January Morning Slot
For the following reaction, in the mass of water produced from 445 g of C57H110O6 is : 2C57H110O6(s) + 163 O2(g) $$ \to ...
JEE Main 2019 (Online) 9th January Evening Slot
A solution of sodium sulphate contains 92 g of Na+ ions per kilogram of water. The molality of Na+ ions in that solution...
JEE Main 2019 (Online) 9th January Morning Slot
An unknown chlorohydrocarbon has 3.55% of chlorine. If each molecule of the hydrocarbon has one chlorine atom only; chlo...
JEE Main 2018 (Online) 16th April Morning Slot
A sample of $$NaCl{O_3}$$ is converted by heat to $$NaCl$$ with a loss of $$0.16$$ $$g$$ of oxygen. The residue is disso...
JEE Main 2018 (Online) 15th April Morning Slot
The ratio of mass percent of C and H of an organic compound (CXHYOZ) is 6 : 1. If one molecule of the above compound (CX...
JEE Main 2018 (Offline)
What quantity (in mL) of a 45% acid solution of a mono-protic strong acid must be mixed with a 20% solution of the same ...
JEE Main 2017 (Online) 9th April Morning Slot
Excess of NaOH (aq) was added to 100 mL of FeCl3 (aq) resulting into 2.14 g of Fe(OH)3 . The molarity of FeCl3 (aq) is ...
JEE Main 2017 (Online) 8th April Morning Slot
The most abundant elements by mass in the body of a healthy human adult are: Oxygen (61.4%); Carbon (22.9%), Hydrogen (1...
JEE Main 2017 (Offline)
1 gram of a carbonate (M2CO3) on treatment with excess HCl produces 0.01186 mole of CO2. The molar mass of M2CO3 in g mo...
JEE Main 2017 (Offline)
The volume of 0.1N dibasic acid sufficient to neutralize 1 g of a base that furnishes 0.04 mole of OH− in aqueous soluti...
JEE Main 2016 (Online) 10th April Morning Slot
5 L of an alkane requires 25 L of oxygen for its complete combustion. If all volumes are measured at constant temperatur...
JEE Main 2016 (Online) 9th April Morning Slot
An organic compound contains C, H and S. The minimum molecular weight of the compound containing 8% sulphur is : (atomi...
JEE Main 2016 (Online) 9th April Morning Slot
The amount of arsenic pentasulphide that can be obtained when 35.5 g arsenic acid istreated with excess H2S in the prese...
JEE Main 2016 (Online) 9th April Morning Slot
The ratio of masses of oxygen and nitrogen in a particular gaseous mixture is 1 : 4. The ratio of number of their molecu...
JEE Main 2014 (Offline)
The molarity of a solution obtained by mixing 750 mL of 0.5 (M) HCl with 250 mL of 2(M) HCl will be:
JEE Main 2013 (Offline)
A gaseous hydrocarbon gives upon combustion 0.72 g of water and 3.08 g of CO2. The empirical formula of the hydrocarbon ...
JEE Main 2013 (Offline)
In the reaction 2Al(s) + 6HCl(aq) $$\to$$ 2Al3+ (aq) + 6Cl-(aq) + 3H2(g)
AIEEE 2007
The density (in g mL-1) of a 3.60 M sulphuric acid solution that is 29% H2SO4 (molar mass = 98 g mol-1) by mass will be...
AIEEE 2007
Density of a 2.05M solution of acetic acid in water is 1.02 g/mL The molality of the solution is
AIEEE 2006
How many moles of magnesium phosphate Mg3(PO4)2 will contain 0.25 mole of oxygen atoms?
AIEEE 2006
If we consider that 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of...
AIEEE 2005
Two solutions of a substance (non electrolyte) are mixed in the following manner. 480 ml of 1.5 M first solution + 520 m...
AIEEE 2005
The ammonia evolved from the treatment of 0.30 g of an organic compound for the estimation of nitrogen was passed in 100...
AIEEE 2004
To neutralise completely 20 mL of 0.1 M aqueous solution of phosphorous acid (H3PO3), the volume of 0.1 M aqueous KOH so...
AIEEE 2004
6.02 $$\times$$ 1020 molecules of urea are present in 100 ml of its solution. The concentration of urea solution is (Avo...
AIEEE 2004
25 ml of a solution of barium hydroxide on titration with a 0.1 molar solution of hydrochloric acid gave a litre value o...
AIEEE 2003
What volume of hydrogen gas at 273 K and 1 atm pressure will be consumed in obtaining 21.6 g of elemental boron (atomic ...
AIEEE 2003
Number of atoms in 558.5 gram Fe (at. wt. of Fe = 55.85 g mol-1) is
AIEEE 2002
In a compound C, H and N atoms are present in 9 : 1 : 3.5 by weight . Molecular weight of the compound is 108 g mol-1 . ...
AIEEE 2002
With increase of temperature, which of these changes?
AIEEE 2002

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