19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The solution of strong acid and weak base (FeCl3) is
Aq. solution of sodium cyanide is
Ka for HF is 3.5 × 10–4. Calculate Kb for the fluoride ion.
The pKa value of NH3 is 5. Calculate the pH of the buffer solution, 1 L of which contains 0.01 M NH4Cl and 0.10 M NH4OH
Consider the following solutions of equal concentrations. A = NH4Cl B = CH3COONa C = NH4OH D = CH3COOH A buffer solution can be obtained by mixing equal volumes of
Which of the following pairs constitutes a buffer?
Solution of 0.1 N NH4OH and 0.1 N NH4Cl has pH 9.25. The pKb of NH4OH is
A certain buffer solution contains equal concentration of X– and HX. the Ka for HX is 10–8. The pH of the buffer is
One litre of a buffer solution containing 0.01 M NH4Cl and 0.1 M NH4OH having pKb of 5 has pH of
A buffer solution of pH 9 can be prepared by mixing
The acidic buffer solution can be prepared by mixing solutions of
Buffer solution can be obtained by mixing aqueous solution of
The pH of 10–5 M HCl solution if 1 ml of it is diluted to 1000 ml is :
The pKb of CNis 4.7. The pH of solution prepared by mixing 2.5 mol of KCN of 2.5 mol of HCN in water and making the total volume up to 500 mL is
10–6 M NaOH is diluted by 100 times. The pH of diluted base is
K C K /C x xx a H
The pH of 0.5 M aqueous solution of HF (Ka = 2 × 10–4) 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 ?
At a certain temperature the value of pKw is 13.4 and the measured pH of solution is 7. The solution is
What is the pH of a 0.015 M Ba(OH)2 solution ?
An acid solution of pH = 6 is diluted hundred times. The pH the solution becomes :
A is an aqueous acid; B is an aqueous base. They are diluted separately, then
The pH of a 0.1 M aqueous solution of a weak acid (HA) is 3. What is its degree of dissociation ?
Four grams of NaOH solid are dissolved in just enough water to make 1 litre of solution. What is the [H+] of the solution ?
The pOH value of a solution whose hydroxide ion concentration is 6.2 × 10–9mol/litre is