19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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
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
The hydrogen ion concentration of 0.2 N CH3COOH which is 40% dissociated is
Aqueous solution of acetic acid contains
The values of dissociation constants of some acids (at 25°C) are as follows. Indicate which is the strongest acid in water
0.2 molar solution of formic acid is ionized 3.2%. Its ionization constant is
Degree of dissociation of 0.1 N CH3COOH is (Dissociation constant = 1 × 10 –5)
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?
Liquid water is denser than ice due to
Which one of the following statements about water is FALSE?
What is the reaction given below called? aq aq H O H O H O OH l l
Hydrolysis of SiCl4 gives
The density of water is less in its solid state because
Given below are two reactions of water with sodium and carbon dioxide. What is the nature of water in these reactions? (i) 2Na + 2H2O -> 2NaOH + H2 (ii) 6CO2 + 12H2O -> C6H12O6 + 6H2O + 6O2
Tritium, a radioactive isotope of hydrogen, emits which of the following particles? (NEET 2021)
Match the following and identify the correct option. (NEET 2020) Column I Column II