Three reactions involving H2PO– 4 are given below: (i) H3PO4 + H2O → H3O+ + H2PO– 4 (ii) H2PO– 4 + H2O → HPO2– 4 + H3O+ (iii) H2PO– 4 + OH– → H3PO4 + O2+ In which of the above does H2PO– 4 act as an acid?
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Solubility product of silver bromide is 5.0 × 10–13. The quantity of potassium bromide (molar mass taken as 120 g mol–1) to be added to 1 litre of 0.05 M solution of silver nitrate to start the precipitation of AgBr is
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One dm3 solution containing 10–5 moles each of Cl– ions and CrO4–2 ions is treated with 10–4 mole of silver nitrate. Which one of the following observations is made? [KSP of Ag2CrO4 = 4 × 10–12] [KSP of AgCl = 1 × 10–10]
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The first and second dissociation constants of an acid H2A are 1.0 × 10–5 and 5.0 × 10–10 respectively.The overall dissociation constant of the acid will be
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pH value of which one of the following is NOT equal to one?
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Hydroxyl ion concentration of 1M HCl is
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Solid Ba(NO3)2 is gradually dissolved in a 1.0 × 10–4 M Na2CO3 solution. At what concentration of Ba2+ will a precipitate begin to form? (Ksp for BaCO3 = 5.1 × 10–9)
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If, in the reaction N2O4 ⇌ 2NO2, $x$ is that part of N2O4 which dissociates, then the number of molecules at equilibrium will be
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The solubility of Ca3(PO4)2 in water is y moles/litre. Its solubility product is
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Consider the following gaseous equilibria with equilibrium constants K1 and K2 respectively. SO2(g) + $\dfrac{1}{2}$O2(g) ⇌ SO3(g) 2SO3(g) ⇌ 2SO2(g) + O2(g) The equilibrium constants are related as ______.
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