19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which one of the following ores is best concentrated by froth floatation method?
In the froth floatation process for benefaction of the ores, the ore particles float because
Chemical leaching is useful in the concentration of:
In the froth-floatation process, the sulphide ores are concentrated by mixing the ore with
In the froth-floatation process, the ore particles float because
Sulphide ores are generally concentrated by the
Concentration of ores is not done by the
Silicon is the main constituent of
The metal which mainly occurs as oxide ore in nature is:
Among the following, the most abundant metal in the earth’s crust is
The concentration of Ag⁺ ion in a given saturated solution of AgCl at 25ºC is 1.06 × 10–5g ion per litre. Thus the solubility product of AgCl is
The solubility product of barium sulphate is 1.5 × 10–9 at 18ºC. Its solubility in water at 18ºC is
The solubility of AgCl at 20ºC is 1.435 × 10–3gm/lit. The solubility product of AgCl is
How many grams of CaC₂O₄ will dissolve in distilled water to make one litre of saturated solution of it ? (Ksp for CaC₂O₄ = 2.5 × 10–9mol2 lit–2)
The solubility of BaSO₄ in water is 2.33 × 10–3g L–1.Its solubility product will be (molecular weight of BaSO₄ = 223)
What is the minimum concentration of required to precipitate BaSO₄ in a solution containing 1.0 × 10–4 mole of Ba²⁺ ? Ksp for BaSO₄ = 4 × 10–10
Some chemists at ISRO wished to prepare a saturated solution of a silver compound and they wanted it to have the highest concentration of silver ion possible. Which of the following compounds, would th…
If a saturated solution prepared by dissolving Ag₂CO₃ in water has Ag 2.56 x . What is the value of Ksp for Ag CO ? (a) 83.9 10 x (b) 8.39 10 x (c) 93.8 10 x (d) 9.38 10 x
The precipitation takes place only when the product of concentration of ions
The Ksp of Mg(OH)₂ is 1 10 x . 0.01 Mg(OH)₂ will precipitate at the limited pH
A precipitate of AgCl is formed when equal volumes of the following are mixed. [Ksp for AgCl = 10 –10]
The solubility products of different sparingly soluble salts are : 1. XY = 4 × 10–20 2. X2Y = 3.2 × 10–11 3. XY₃ = 2.7 × 10–31 The increasing order of solubility is :
Ksp of Mg(OH)₂ is 4.0 × 10–6. At what minimum pH, Mg²⁺ ions start precipitating 0.01 MgCl
The pH of an aqueous solution of Ba(OH)₂ is 10. If the Ksp of Ba(OH)₂ is 1 × 10–9, then the concentration of Ba²⁺ ions in the solution in mol L–1 is
Why only As+3 gets precipitated as As₂S₃ and not Zn+2 as ZnS when H₂S is passed through an acidic solution containing As+3 and Zn+2 ?