19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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)
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
The conjugate base of HPO is (a) PO (b) H PO
According to Lewis concept, acid is
According to Lowry and Bronsted system, the chloride ion (Cl–) in aqueous solution is a
The conjugate base of a weak acid is
Of the given anions, the strongest Bronsted base is
Review the equilibrium and choose the correct statement HClO4 + H2O H3O + + ClO4 –
The conjugate acid of HPO4 2– is
Conjugate base of NH3 is (a) NH (b) NH (c) NH
The correct order of acid strength is
At 100C the Kw of water is 55 times its value at 25C. What will be the pH of neutral solution? (log 55 = 1.74) (NEET 2013)
Accumulation of lactic acid (HC3H5O3), a monobasic acid in tissues leads to pain and a feeling of fatigue. In a 0.10 M aqueous solution, lactic acid is 3.7% dissociated. The value of dissociation constant…
Identify the correct order of solubility in aqueous medium. (NEET 2013)
The values of Ksp of CaCO3 and CaC2O4 are 4.7 x 10-9 and 1.3 x 10-9 respectively at 25C. If the mixture of these two is washed with water, what is the concentration of Ca2+ ions in water? (NEET 2013)
The dissociation constant of a weak acid is 1 x 104. In order to prepare a buffer solution with a pH = 5, the [Salt]/[Acid] ratio should be (NEET 2013)
Which of these is least likely to act as a Lewis’s acid? (NEET 2013)
Buffer solutions have constant acidity and alkalinity because (AIPMT 2012)
The pH of 10–5 M HCl solution if 1 ml of it is diluted to 1000 ml is :
Equal volumes of three acid solutions of pH 3, 4 and 5 are mixed in a vessel. What will be the H+ ion concentration in the mixture ? (CBSE AIPMT 2008) (a) –4 1.11 10 M x (b) 3.7 10 M x (c) 3.7 10 M x (d) …
Which of the following is correct? (CPMT 2008)