19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Mercury is the only metal that is liquid at 0ºC. This is due to its :
Chemically philosopher of wool is :
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 ->
Which of the following oxides of manganese is stable as well as strongly acidic ?
Which of the following oxides of manganese is amphoteric ?
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.
The value of magnetic moment ( spin only) for Cu2+ in CuSO4.5H2O is
Which one of the following oxides of chromium is amphoteric in nature ?
The compound ZnSO4 is white because (a)charge is transferred from the metal to the oxygen atoms (b)electron transfer to d level does not occur as the level is already filled to capacity in zinc
Which of the following compounds is colourless?
Which of the following compounds is expected to be coloured ?
Identify the species having an atom in +6 oxidation state. (a) (b) [Cr(CN) ] (c)
Chromyl chloride, CrO2Cl2, is prepared by heating a mixture of
The incorrect statement among the following is: (NEET 2021)
Heat 4K Cr O 4K CrO 3O X -> . In the above reaction X is
Zr (Z = 40) and Hf (Z = 72) have similar atomic and ionic radii because of: (NEET 2021)
Identify the incorrect statement. (NEET 2020)
Identify the incorrect statement. (NEET 2020)
When neutral or faintly alkaline KMnO4 is treated with potassium iodide, iodide ion is converted into ‘X’. ‘X’ is (Odisha NEET 2019)
The calculated spin only magnetic moment o 2+ Cr ion is : (NEET 2020)
The manganate and permanganate ions are tetrahedral, due to: (NEET 2019)
Which one of the following ions exhibits d-d transition and paramagnetic as well? (NEET 2018)
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…
Name the gas that can readily decolourise acidified KMnO4 solution. (NEET 2017)