19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which of the following fluoro-compounds is most likely to behave as a Lewis’s base? (NEET-II 2016)
The percentage of pyridine (C H N) that forms pyridinium ion (C H N H) in a 0.10 M aqueous pyridine solution ( b K for C H N 1.7 10 ) x is (NEET 2016)
What is the pH of the resulting solution when equal volumes of 0.1 M NaOH and 0.01 M HCl are mixed ? (AIPMT 2015)
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)
Equimolar solutions of the following substances were prepared separately. Which one of these will record the highest pH value? (AIPMT 2012)
pH of a saturated solution of Ba(OH)2 is 12. The value of solubility product (Ksp) of Ba(OH)2 is (AIPMT 2012, 2010)
A buffer solution is prepared in which the concentration of NH3 is 0.30 M and the concentration of NH is 0.20 M. If the equilibrium constant, Kb for NH3 equal 1.8 x 105, what is the pH of this solution? (log 2.7 = 0.4…
Which of the following is least likely to behave as Lewis’s base? (AIPMT 2011)
Aqueous solution of acetic acid contains
The solubility of CaCO3 is 7 mg/L. Calculate the solubility product of BaCO3 from this information and from the fact that when Na2CO3 is added slowly to a solution containing equimolar concentration …
The solubility of AgCl is maximum in
The solubility of LiOH in a solution with pH = 8 is (Ksp = 1.8 × 10–12)
Assertion (A): pH of HCl solution is less than that of acetic acid of the same concentration. Reason (R): In equimolar solutions, the number of titrable protons present in HCl in less than that present in acetic…
Assertion: If HA and HB are two weak non-basic acids with Ka(HA) < Kb(HB), then, the aqueous solution of NaA will have higher pH than pH of aqueous solution of NaB of same concentration. Reason: Conjugate base of a…
The solubility product of Ag2CrO4 is 32 × 10–12. What is the concentration of ions in that solution (in g ions L–1)
The least soluble compound (salt) of the following is
The Ksp of CuS, Ag2S and HgS are 10–31, 10–44 and 10–54 respectively. The solubility of these sulphides are in the order
Why only As+3 gets precipitated as As2S3 and not Zn+2 as ZnS when H2S is passed through an acidic solution containing As+3 and Zn+2 ?
The pH of an aqueous solution of Ba(OH)2 is 10. If the Ksp of Ba(OH)2 is 1 × 10–9, then the concentration of Ba2+ ions in the solution in mol L–1 is