19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
25 mL of a solution of Ba(OH)₂ on titration with a 0.1 M solution of HCl gave a titre value of 35 mL. The molarity of barium hydroxide solution was
Assertion :When a solution is diluted from volume V₁ to V₂ by adding solvents, its molarity before dilution M1 and after dilution M2 are related as : M1V₁ = M2V₂ Reason:During dilution, moles of the solute remains co…
A standard solution of 0.165 M HCl is being used to determine the concentration of an unknown NaOH solution. If 25.5 mL of an acid solution are required to neutralize 15.0 mL of the base, what is the mo…
Molarity equation of a mixture of solutions of same substance is given by (a) M V M V M V ... M M M x x x x (b) M V M V M V ... M V V V (c) M M M ... M V V V V V V (d) M M M ... M V V V V V V x x Ans. (b) Sol. Molarit…
The density of a solution prepared by dissolving 120g of urea (mol. mass = 60 u) in 1000 g of water is 1.15g/mL. The molarity of this solution is
Mole fraction of ethanol in ethanol - water mixture is 0.25. Hence, percentage concentration of ethanol (C₂H₆O) by weight of mixture is
What is the weight % sulphuric acid in an aqueous solution which is 0.502 M in sulphuric acid? The specify gravity of the solution is 1.07
What is the molarity of S O ion in aqueous solution that contain 34.2 ppm of Al₂(SO₄)₃ ? (Assume complete dissociation and density of solution 1 g/mL)
An antifreeze mixture contains 40% ethylene glycol (C₂H₆O₂) by weight in the aqueous solution. If the density of this solution is 1.05 g/mL, what is the molar concentration?
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 MOLE & EQUIVALENT CONCEPT
What volume of 0.4 M FeCl₃ . 6H₂O will contain 600 mg of Fe³⁺ ?
With increase of temperature, which of these changes?
The mole fraction of a given sample of I₂ in C H is 0.2. The molality of I₂ in C₆H₆ is
An aqueous solution of ethanol has density 1.025 g/mL and it is 2 M. What is the molality of this solution ?
A molal solution is one that contains one mole of a solute in
What is the mole fraction of glucose in 10% w/w glucose solution?
Density of a 2.05 M solution of acetic acid in water is 1.02 g/mL. The molality of the solution is
A solution is made by dissolving 49 g of H₂SO₄ in 250 mL of water. The molarity of the solution prepared is
NH₃ is produced according to the following reaction: N₂(g) + 3H₂(g) → 2NH₃(g) In an experiment 0.25 mol of NH₃ is formed when 0.5 mol of N₂ is reacted with 0.5 mol of H₂. What is % yield ?
If 0.5 mole of BaCl₂ is mixed with 0.20 mole of Na₃PO₄, the maximum number of moles of Ba₃(PO₄)₂ then can be formed is
0 3 . x x
Calculate the number of oxygen atoms required to combine with 7.0g of N₂ to form N₂O₃ if 80% of N₂ is converted into products. N O N O →
ms ato x Therefore, X 3 10 x atoms Number of moles=Moles N 3.0 10 6.022 10 mol 160.58 / 1.6 10 A M M g mol x >> x x x >> x
If 80.00 g of X combines with 1.5 × 1023 atoms of Y to form X2Y without any of either element remaining, what is the atomic weight of X ?
Determine the empirical formula of Kelvar, used in making bullet proof vests, is 70.6% C, 4.2% H, 11.8% N and 13.4% O