Stoichiometry & Calculations: JEE Questions & Solutions

80 mL of a hydrocarbon on mixing with 264 mL of oxygen in a closed U-tube undergoes complete combustion. The residual gases after cooling…

14.0 g of calcium metal is allowed to react with excess HCl at 1.0 atm pressure and 273 K. Which of the following statements is incorrect?…

By usual analysis, 1.00 g of compound (X) gave 1.79 g of magnesium pyrophosphate. The percentage of phosphorus in compound (X) is: (nearest…

Aqueous HCl reacts with MnO₂(s) to form MnCl₂(aq), Cl₂(g) and H₂O(l). What is the weight (in g) of Cl₂ liberated when 8.7 g of MnO₂(s) is…

In the reaction, 2Al(s) + 6HCl(aq) → 2Al³⁺(aq) + 6Cl⁻(aq) + 3H₂(g)

A + 2B → AB₂ 36.0 g of A (Molar mass = 60 g mol⁻¹) and 56.0 g of B (Molar mass = 80 g mol⁻¹) are allowed to react. Which of the following…

The mass of benzanilide obtained from the benzoylation reaction of 5.8 g of aniline, if yield of product is 82%, is g (nearest integer).…

x mg of pure HCl was used to make an aqueous solution. 25.0 mL of 0.1 M Ba(OH)₂ solution is used when the HCl solution was titrated against…

A student has planned to prepare acetanilide from aniline using acetic anhydride. The student has started from 9.3 g of aniline. However,…

For the given reaction: CaCO3 + 2HCl -> CaCl2 + H2O + CO2 If 90 g CaCO3 is added to 300 mL of HCl which contains 38.55% HCl by mass and has…

Some CO₂ gas was kept in a sealed container at a pressure of 1 atm and at 273 K. This entire amount of CO₂ gas was later passed through an…

What amount of bromine will be required to convert 2 g of phenol into 2, 4, 6-tribromophenol? (Given molar mass in g mol⁻¹ of C, H, O, Br…

During "S" estimation, 160 mg of an organic compound gives 466 mg of barium sulphate. The percentage of Sulphur in the given compound is %.…

0.01 mole of an organic compound (X) containing 10% hydrogen, on complete combustion, produced 0.9 g H₂O. Molar mass of (X) is g mol⁻¹.

When 81.0 g of aluminium is allowed to react with 128.0 g of oxygen gas, the mass of aluminium oxide produced in grams is (nearest integer).

For a reaction, N₂O₅(g) → 2NO₂(g) + 1/2 O₂(g) in a constant volume container, no products were present initially. The final pressure of the…

X g of benzoic acid on reaction with aqueous NaHCO₃ release CO₂ that occupied 11.2 L volume at STP. X is g.

Consider the following reaction occurring in the blast furnace. Fe₃O₄(s) + 4CO(g) → 3Fe(l) + 4CO₂(g) ‘x’ kg of iron is produced when 2.32 ×…

The elemental composition of a compound is 54.2% C, 9.2% H, and 36.6% O. If the molar mass of the compound is 132 g/mol, the molecular…

The molarity of a 70% (mass/mass) aqueous solution of a monobasic acid (X) is M. [Given: density of the aqueous solution of X is 1.25 g…

0.1 M solution of KI reacts with excess of H₂SO₄ and KIO₃, according to the equation: 5I⁻ + IO₃⁻ + 6H⁺ → 3I₂ + 3H₂O Identify the correct…

In the Claisen-Schmidt reaction to prepare dibenzalacetone from 5.3 g benzaldehyde, a total of 3.51 g of product was obtained. The…

CaCO₃(s) + 2HCl(aq) → CaCl₂(aq) + CO₂(g) + H₂O(l) Consider the above reaction. What mass of CaCl₂ will be formed if 250 mL of 0.76 M HCl…

On complete combustion 1.0 g of an organic compound (X) gave 1.46 g of CO₂ and 0.567 g of H₂O. The empirical formula mass of compound (X)…

0.5 g of an organic compound on combustion gave 1.46 g of CO₂ and 0.9 g of H₂O. The percentage of carbon in the compound is (Nearest…

10 mL of 2 M NaOH solution is added to 20 mL of 1 M HCl solution kept in a beaker. Now, 10 mL of this mixture is poured into a volumetric…

Mass of magnesium required to produce 220 mL of hydrogen gas at STP on reaction with excess of dil. HCl is Given: Molar mass of Mg is 24 g…

X g of nitrobenzene on nitration gave 4.2 g of m-dinitrobenzene. X = g. (nearest integer) [Given: molar mass (in g mol⁻¹) C: 12, H: 1, O:…

Fortification of food with iron is done using FeSO₄· 7H₂O. The mass in grams of the FeSO₄· 7H₂O required to achieve 12 ppm of iron in 150…

The amount of calcium oxide produced on heating 150 kg limestone (75% pure) is kg. (Nearest integer) Given: Molar mass (in g mol⁻¹) of…

An organic compound weighing 500 mg, produced 220 mg of CO₂ on complete combustion. The percentage composition of carbon in the compound is…

Butane reacts with oxygen to produce carbon dioxide and water following the equation given below: C₄H₁₀(g) + 13/2 O₂(g) → 4CO₂(g) + 5H₂O(l)…

20 mL of sodium iodide solution gave 4.74 g silver iodide when treated with excess of silver nitrate solution. The molarity of the sodium…

Mass of methane required to produce 22 g of CO₂ after complete combustion is g.

9.3 g of aniline is subjected to reaction with excess of acetic anhydride to prepare acetanilide. The mass of acetanilide produced if the…

If 50 mL of 0.5 M oxalic acid is required to neutralise 25 mL of NaOH solution, the amount of NaOH in 50 mL of the given NaOH solution is:

The density of a monobasic strong acid (Molar mass 24.2 g mol⁻¹) is 1.21 kg L⁻¹. The volume of its solution required for the complete…

Number of hydrogen atoms per molecule of a hydrocarbon A having 85.8% carbon is: Given: Molar mass of A = 84 g/mol

When a hydrocarbon A undergoes combustion in the presence of air, it requires 9.5 equivalents of oxygen and produces 3 equivalents of…

A 300 mL bottle of soft drink has 0.2 M CO₂ dissolved in it. Assuming CO₂ behaves as an ideal gas, the volume of the dissolved CO₂ at STP…

The strength of 50 volume solution of hydrogen peroxide is..... g/L (Nearest integer). Given: Molar mass of H₂O₂ is 34 g mol⁻¹ Molar volume…

On complete combustion, 0.492 g of an organic compound gave 0.792 g of CO₂. The % of carbon in the organic compound is (Nearest integer).…

Zinc reacts with hydrochloric acid to give hydrogen and zinc chloride. The volume of hydrogen gas produced at STP from the reaction of 11.5…

When a hydrocarbon A undergoes complete combustion it requires 11 equivalents of oxygen and produces 4 equivalents of water. What is the…

A sample of a metal oxide has formula M_0.83O_1.00. The metal M can exist in two oxidation states +2 and +3. In the sample of M_0.83O_1.00,…

Assume carbon burns according to the following equation: 2C(s) + O₂(g) → 2CO(g) When 12 g of carbon is burnt in 48 g of oxygen, the volume…

The volume of 0.02 M aqueous HBr required to neutralize 10.0 mL of 0.01 M aqueous Ba(OH)2 is (Assume complete neutralization):

0.5 g of an organic compound (X) with 60% carbon will produce × 10⁻¹ g of CO₂ on complete combustion.

Three bulbs are filled with CH₄, CO₂, and Ne as shown in the picture. The bulbs are connected through pipes of zero volume. When the…

In the following reactions, the total number of oxygen atoms in X and Y is: Na₂O + H₂O → 2X Cl₂O₇ + H₂O → 2Y

For the given reaction, if the initial pressure is 450 mmHg and the pressure at time t is 720 mmHg at a constant temperature T and constant…

y mole of a hydroxy aldehyde, OHC-CH₂CH₂CH₂-CH₂OH, is treated with x mol of MeMgBr, followed by aqueous H₃O⁺ work-up, to give the diol…

One mole of P₄ reacts with 8 moles SOCl₂ to give 4 moles of A, x mole of SO₂ and 2 moles of B. A, B and x respectively are.

The volume of hydrogen liberated at STP by treating 2.4 g of magnesium with excess of hydrochloric acid is × 10⁻² L. Given: Molar volume of…

A metal chloride contains 55.0% of chlorine by weight. 100 mL vapours of the metal chloride at STP weigh 0.57 g. The molecular formula of…

In the given reaction cycle CaCl₂ + Na₂CO₃ → X + Y where X is converted back to CaCl₂ by Z. X, Y and Z respectively are:

The mass of NH₃ produced when 131.8 kg of cyclohexanecarbaldehyde undergoes Tollens test is kg. (Nearest Integer) Given: Molar Mass of C =…