19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Calculate the concentration of H+ ion in mol/L of 0.010M solution of NH4Cl? (Kb = 1.8 × 10–6)
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 P…
The pKb of dimethylamine and pKa of acetic acid are 3.27 and 4.77 respectively at T(K). The correct option for the pH of dimethyl ammonium acetate solution is: (NEET 2021)
Find out the solubility of Ni(OH)2 in 0.1 M NaOH. Given that the ionic product of Ni(OH)2 is 2 10 x . (NEET 2020) (a) 2 10 M x (b) 2 10 M x (c) 1 10 M x (d) 1 10 M x
The pH of 0.01 M NaOH(aq) solution will be (Odisha NEET 2019)
Which will make basic buffer? (NEET 2019)
The molar solubility of CaF2 5.3 10 sp K x in 0.1 M solution of NaF will be (Odisha NEET 2019) (a) 5.3 10 x (b) 0.5 10 x (c) 5.3 10 x (d) 0.125 10 x
pH of a saturated solution of Ca(OH)2 is 9. ‘The solubility product sp K of Ca (OH)2 is (NEET 2019) (a) 0.5 10 x (b) 0.5 10 x (c) 0.25 10 x (d) 0.125 10 x
Which of the following cannot act both as Bronsted acid and as Bronsted base? (Odisha NEET 2019) (a) HCO
Conjugate base for Bronsted acids H2O and HF are (NEET 2019)
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)
In a buffer solution containing equal concentration of B– and HB, the Kb for B– is 1010. The pH of buffer solution is (AIPMT 2010)
What is [H+] in mol/L of a solution that is 0.20 M in CH3COONa and 0.10 M in CH3COOH? (Ka for CH3COOH = 1.8 x 10-5) (AIPMT 2010)
Which one of the following molecular hydrides acts as a Lewis’s acid? (AIPMT 2010)
Which of the following molecules do not act as a Lewis’s base? (AIPMT 2009)
What is the [OH-] in the final solution prepared by mixing 20.0 mL of 0.050 M HCl with 30.0 mL of 0.10 M Ba(OH)2? (AIPMT 2009)
The ionization constant of ammonium hydroxide is 1.77 x 105 at 298 K. Hydrolysis constant of ammonium chloride is (AIPMT 2009)
Which of the following molecules acts as Lewis’s acid? (AIPMT 2009)
Among the following the strongest conjugate base is (DUMET 2009) (a) NO
If the solubility of calcium fluoride in pure water is x mol/L, its solubility product is (AFMC 2009) (a) 2x