19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
0.2 molar solution of formic acid is ionized 3.2%. Its ionization constant is
The values of dissociation constants of some acids (at 25°C) are as follows. Indicate which is the strongest acid in water
Aqueous solution of acetic acid contains
The hydrogen ion concentration of 0.2 N CH3COOH which is 40% dissociated is
The a K of an acid is 3.2 10 x . The degree of dissociation of the acid at concentration of 0.2M is (a) 6.0 10 x (b) –2 1.26 10 x (c) –4 x (d) 0.04 10 x
For a weak acid HA, Ostwald’s dilution law is represented by the equation (a) a c K 2 (b) a c K (c) a K c c (d) a c K
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 concentration of [H+] and concentration of [OH–] of a 0.1 aqueous solution of 2% ionised weak monoprotic acid is [ionic product of water = 1×10–14]
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 term pH comes from
A soda water bottle has pH
Which of the following solutions will have the highest pH value ?
] ] 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
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