19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Chemically philosopher of wool is :
reacts with OH– as CrO 2CrO 2H Cr O H O -> Cr O The change in oxidation number of Cr is
Name the gas that can readily decolourise acidified KMnO4 solution. (NEET 2017)
HgCl reacts with mercury in an iron vessel to form mercurous chloride. HgCl + Hg Hg Cl Δ -> 2. Mercurous chloride can also be prepared by the reduction of mercury chloride by tin. 2+ 2HgCl + SnCl Hg Cl SnCl ->
Deep red-yellow vapour of CrO2Cl2 is passed into an aqueous solution of NaOH. The solution turns
Which of the following statements is incorrect for CrO3 ? (a)It is a bright orange solid.
Match the metal ions given in Column I with the spin magnetic moments of the ions given in Column II and assign the correct code (NEET 2018) Column I Column II A. Co3+ i. 8 B.M. B. Cr…
CrO3 dissolves in aqueous NaOH to give (a) CrO
Identify the incorrect statement. (NEET 2020)
Identify the incorrect statement. (NEET 2020)
Na2CrO4 on treatment with lead acetate gives a precipitate. This precipitate is dried and the solid is used as a pigment for road signs and markings. The solid is known as
Zr (Z = 40) and Hf (Z = 72) have similar atomic and ionic radii because of: (NEET 2021)
The calculated spin only magnetic moment o 2+ Cr ion is : (NEET 2020)
Acidified K2Cr2O7 on treatment with KI produces
The incorrect statement among the following is: (NEET 2021)
When hydrogen peroxide is added to an acidic solution of a dichromate, the most probable product is
reacts with H+ as The change in oxidation number of Cr is
KMnO4 in an acidic medium oxidizes (a) C O to CO2 (b) N2H4 to N2 (c) HSO to SO
Which of the following is an incorrect statement ? (a)In a redox reaction in acidic medium, KMnO4 produces Mn2+ ions. (b)In a redox reaction in strongly alkaline medium, KMnO4produces MnO ions. (c)In a redox reaction …
The value of magnetic moment ( spin only) for Cu2+ in CuSO4.5H2O is
Which of the following oxides of manganese is stable as well as strongly acidic ?
Which of the following oxides of manganese is amphoteric ?
KMnO4 in an acidic medium will not oxidize (a) (b)
is prepared by treating a solution containing Mn2+ ions with a very strong oxidizing agent such as
KMnO4 is manufactured on a large scale by (a)fusing MnO2 with KOH and then oxidizing the fused mixture with KNO3