19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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
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 ?
1 mole of oxalic acid is treated with conc. H₂SO₄. The resultant gaseous mixture is passed through a solution of KOH. The mass of KOH consumed will be (where KOH absorbs CO₂.) (COOH)₂ CO + CO₂ + H₂O 2 KOH + CO₂…
How many moles of ferric alum (NH ) SO Fe (SO ) .24 H₂O can be made from the sample of Fe containing 0.0056 g of it ?
NaOH is formed according to the reaction 2Na O Na O → Na O H O 2NaOH → To make 4g of NaOH, Na required is
What is the weight of oxygen required for the complete combustion of 2.8 kg of ethylene ?
Which of the given reactions are counted as balanced reactions? (a) H +O 2H O → (b) 4Al+3O 2Al O → (c) Mg OH +2HNO 2Mg NO +2H O → (d) N +3H NH → Ans. (b) Sol. Al O Al O → is a balanced reaction because the number of a…