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The pH of solutions A, B, C, D are respectively 9.5, 2.5, 3.5, 5.5, The most acidic solution is
] ] In option B, it is a base salt. In option C, it is a weak acid salt. In option D, it is a strong acid
Which of the following solutions will have the highest pH value ?
A soda water bottle has pH
The term pH comes from
w 2H O H O OH ,K 1 10 x at 25ºC hence Ka is : (a) 1 10 x (b) 5.55 10 x (c) 18 10 x (d) 1.00 10 x
The degree of dissociation of 0.1 M HCN solution is 0.01%. Its ionisation constant would be
The following equilibrium exists in aqueous solution, CH3COOH CH3COO – + H + if dil. HCl is added, without change in temperature, the
A monoprotic acid in 1.00 M solution is 0.01% ionised. The dissociation constant of this acid is
Which of the following is the weakest acid?
Which equilibrium can be described as an acid-base reaction using the Lewis’s acid-base definition, but not using Bronsted-Lowry definition ?
Pure water is kept in a vessel and it remains exposed to atmospheric CO2 which is absorbed, then its pH will be
Arrange NH ,H O,H O ,HF and OH in increasing order of acidic nature. (a) H O NH HF OH H O (b) NH HF H O H O OH (c) HO H O NH HF H O (d) H O HF H O NH OH
Which of the following is least likely to behave as Lewis’s base?
Which one of the following molecular hydrides acts as a Lewis’s acid?
Which of the following molecules acts as Lewis acid?
The strongest conjugate base is (a) NO
If the solubility of calcium fluoride in pure water is x mol/L, its solubility product is (AFMC 2009) (a) 2x
Solubility product of a salt AB is 1 × 10–8 M2 in a solution in which the concentration of A+ ions are 10–3M. The salt will precipitate when the concentration of B– ions is kept (AFMC 2008)
Equal volumes of three acid solutions of pH 3, 4 and 5 are mixed in a vessel. What will be the H+ ion concentration in the mixture ? (CBSE AIPMT 2008) (a) –4 1.11 10 M x (b) 3.7 10 M x (c) 3.7 10 M x (d) …
Which of the following is correct? (CPMT 2008)
The pH of 10–8 M HCl solution is (AFMC 2008)
Calculate the pOH of a solution at 25C that contains 1 x 1010 M of hydronium ions, i.e., H3O+. (AIPMT 2007)
Which of the following fluoro-compounds is most likely to behave as a Lewis’s base? (NEET-II 2016)
A weak acid, HA, has a K of 1.00 × 10–5. If 0.100 mole of this acid is dissolved in 1L of water, the percentage of acid dissociated at equilibrium is closest to (CBSE AIPMT 2007)