19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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?
The strongest conjugate base is (a) NO
Which of the following is not Lewis’s acid ?
BF3 is acid according to
In the reaction I I I -> the Lewis’s base is
According to Lewis concept, acid is
Which of the following metals does not liberate hydrogen from acids?
Pure nascent hydrogen is best obtained by
Very pure hydrogen (99.9%) can be made by which of the following processes?
Syngas is a mixture of