19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The major role of fluorspar (CaF2) which is added in small quantities in the electrolytic reduction of alumina dissolved in fused cryolite (Na3AlF6) is
In extractive metallurgy of zinc, partial fusion of ZnO with coke is called
Silver can be separated from lead by:
The mineral carnallite contains
Copper and lead are mainly extracted by
Which of the following minerals contains calcium as well as magnesium?
Of the following metals, the one which cannot be obtained by the electrolysis of the aqueous solution of its salt is
Electrolytic reduction of alumina to aluminium by the Hall-Heroult process is carried out
Cryolite is:
In the context of the Hall - Heroult process for the extraction of Al, which of the following statements is false?
The pH of the solution containing 50 mL each of 0.10 M sodium acetate and 0.01 M acetic acid is [Given pKa of CH3COOH = 4.57] (NEET 2022)
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)
The solubility of BaSO4 in water is 2.42 x 10-3 g L-1 at 298 K. The value of its solubility product sp K will be (Given molar mass of BaSO4 = 233 g mol-1) (NEET 2018) (a) 1.08 10 mol L x (b) 1.08 10 mol L x (c) …
Following solutions were prepared by mixing different volumes of NaOH and HCl of different concentrations. (NEET 2018) (A) M M 60mL HCl+40mL NaOH (B) M M 55mL HCl + 45mL NaOH (C) M M 75mL HCl + 25mL NaOH (D) M M 100mL…
Concentration of the Ag ions in a saturated solution of Ag C O is 2.2 10 mol L . x Solubility product of Ag C O is (NEET 2017) (a) 2.66 10 x (b) 4.5 10 x (c) 5.3 10 x (d) 2.42 10 x
MY and NY3. Two nearly insoluble salts, have the same sp K value of 6.2 x 10-15 at room temperature. Which statement would be true in regard to MY and NY3? (NEET-I 2016)
The solubility of AgCl with solubility product 1.6x10-10 in 0.1 M NaCl solution would be (NEET- II 2016)
Which of the following fluoro-compounds is most likely to behave as a Lewis’s base? (NEET-II 2016)