19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Concentration CN – in 0.1 M HCN is [Ka = 4 × 10 –10]
At infinite dilution, the percentage ionisation for both strong and weak electrolytes is
A monoprotic acid in 1.00 M solution is 0.01% ionized. The dissociation constant of this acid is (a) 1 10 x (b) 1 10 x (c) 1 10 x (d) 1 10 x
For a pure water,
The concentration of water molecules in pure water at 298 K is
The hydrogen ion concentration of a 10–8 M HCl aq. solution at 298K (Kw = 10–14) is (a) 1.0 10 M x (b) 1.10 10 M x (c) 9.525 10 M x (d) 1.0 10 M x
At 90oC, pure water has H3O+ ion concentration of 10-6 mol/L. The Kw at 90oC is
The pH of solutions A, B, C, D are respectively 9.5, 2.5, 3.5, 5.5, The most acidic solution is
4g of NaOH are put into 10 litres of water. The pH of the resulting solution will be
The pOH value of a solution whose hydroxide ion concentration is 6.2 × 10–9mol/litre is
Four grams of NaOH solid are dissolved in just enough water to make 1 litre of solution. What is the [H+] of the solution ?
Calculate the OH– ion concentration of NaOH of which pH is 12.
The solution of hydrochloric acid has pH = 4, the molar strength of this solution is
The number of H+ in 1 cc of solution of pH = 13 is
Which of the following has highest pH?
What will be the pH of a solution formed by mixing 40 ml of 0.10 M HCl with 10 ml of 0.45 M NaOH
The pH of a 0.1 M aqueous solution of a weak acid (HA) is 3. What is its degree of dissociation ?
A is an aqueous acid; B is an aqueous base. They are diluted separately, then
An acid solution of pH = 6 is diluted hundred times. The pH the solution becomes :
What is the pH of a 0.015 M Ba(OH)2 solution ?
At a certain temperature the value of pKw is 13.4 and the measured pH of solution is 7. The solution is
In decimolar solution, CH3COOH is ionised to the extent of 1.3%. If log 1.3 = 0.11, what is the pH of the solution ?
The pH of 0.5 M aqueous solution of HF (Ka = 2 × 10–4) is
K C K /C x xx a H
10–6 M NaOH is diluted by 100 times. The pH of diluted base is