19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The correct order of increasing [H₃O⁺] in the following aqueous solution is:
H S aq H aq HS aq ;K 9.5 10 x HS aq H aq S aq ;K 1.0 10 x Given the equilibrium constants provided what is the equilibrium constant for the reaction: S (aq) 2H (aq) H S(aq) K = ?
How many milliliters (mL) of a 0.0500 M NaOH (a strong base) solution should be added to 1.00 L of 0.100 M H₃PO₄, solution to produce a buffer of pH = 2.00 ? For H₃PO₄, a K = 6.67 × 10–3 Given: H PO …
How many milliliters of 0.250 M NH₄Cl would have to be added to 450 mL of 0.350 M KOH in order to produce a buffer solution with a pH of 9.10? (Kb(NH₃) = 1.8 × 10–5)
Which pair of reagents, mixed in the appropriate proportion, could make a buffer in pH 3-4 range ?
The pH of 10–5 M HCl solution if 1 ml of it is diluted to 1000 ml is :
When one drop of a concentrated HCl is added to 1 L of pure water at 25ºC, the pH drops suddenly from 7 to 4. When the second drop of the same acid is added, the pH of the solution further drops to about
A student dissolved 0.100 mol of an unknown monoprotic acid, HA, in sufficient water to make 1.00 L of solution. She measured the pH of the solution as pH = 2.60. Of the following, the acid HA is
For a “c molar” concentrated solution of a weak electrolyte AxBy, the degree of dissociation is given as (a) (b) (c) (d)
What is the equilibrium [OH–] in 0.1413 M H₂CO₃ ? H CO H O H O HCO (Ka = 4.30 ×10–7)
A mixture of weak acid is 0.1 M in HCOOH a K 1.8 10 x and 0.1 M in HOCN a K 3.1 10 x Hence, [H O ] is
The equilibrium constant for this reaction is approximately 10–3. HPO (aq.) HCO (aq.) H PO (aq.) CO (aq.) Which is the strongest conjugate base in this reaction? (a) HPO (aq.) (b) HCO (aq.) (c) H PO (aq.) (d) CO (aq.)
Consider the following reaction which proceeds predominantly forward HSO NH NH SO From the information given it is clear that (a) HSOis a stronger acid than NH.
Assertion: Aqueous solution of ammonium carbonate is basic. Reason: Acidic or Basic nature of a salt solution of a salt of weak acid and weak base depends on Ka and Kb of the acid and base forming it.
Assertion: When aqueous, solution of CH₃COONH₄ is diluted, then its degree of hydrolysis increases. Reason: Ammonium acetate is the salt of weak acid and weak base; its degree of hydrolysis does not de…
Assertion: When aqueous, solution of CH₃COOAg is diluted, then its degree of hydrolysis increases. Reason: Silver acetate is the salt of weak acid and weak base; its degree of hydrolysis does not depend on th…
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…
A student dissolved 0.100 mol of an unknown monoprotic acid, HA, in sufficient water to make 1.00 L of solution. She measured the pH of the solution as pH = 2.60. Of the following, the acid HA is
For a “c molar” concentrated solution of a weak electrolyte AxBy, the degree of dissociation is given as (a) (b) (c) (d)
What is the equilibrium [OH–] in 0.1413 M H₂CO₃ ? H CO H O H O HCO (Ka = 4.30 ×10–7)
A mixture of weak acid is 0.1 M in HCOOH a K 1.8 10 x and 0.1 M in HOCN a K 3.1 10 x Hence, [H O ] is
The equilibrium constant for this reaction is approximately 10–3. HPO (aq.) HCO (aq.) H PO (aq.) CO (aq.) Which is the strongest conjugate base in this reaction? (a) HPO (aq.) (b) HCO (aq.) (c) H PO (aq.) (d) CO (aq.)
Consider the following reaction which proceeds predominantly forward HSO NH NH SO From the information given it is clear that (a) HSOis a stronger acid than NH.
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