19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Identify the species having an atom in +6 oxidation state. (a) (b) [Cr(CN) ] (c)
Spiegeleisen is an alloy of :
Philosopher’s wool when heated with BaO at 1100ºC gives the compound :
Which of the following compounds is expected to be coloured ?
Which of the following compounds is colourless?
Give the correct order of initials T or F for the following statements. Use T if the statement is true and F if it is false. (I) Sulphide ions reacts with Na2 [Fe(CN)5(NO)] to form a purple-coloured compound Na4 [Fe(C…
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 one of the following oxides of chromium is amphoteric in nature ?
The incorrect statement among the following is: (NEET 2021)
Which of the following electronic configurations represents Fe3+ ?
Zr (Z = 40) and Hf (Z = 72) have similar atomic and ionic radii because of: (NEET 2021)
The noble character of platinum and gold is favoured by
The value of magnetic moment ( spin only) for Cu2+ in CuSO4.5H2O is
Which one of the following ions exhibits d-d transition and paramagnetic as well? (NEET 2018)
Which of the following statements is incorrect for CrO3 ? (a)It is a bright orange solid.
Among the transition metals, the melting points of Zn, Cd and Hg are relatively low because
Transition metals
Deep red-yellow vapour of CrO2Cl2 is passed into an aqueous solution of NaOH. The solution turns
Chromyl chloride, CrO2Cl2, is prepared by heating a mixture of
Which of the following oxides of manganese is amphoteric ?
Which of the following oxides of manganese is stable as well as strongly acidic ?
The last electron of a d-block element occupies the orbital
The electronic configurations of the first four members of the actinide series cannot be written accurately in a regular manner because of
Which of the following elements has completely filled d orbitals (the d10 configuration) ?
Which of the following ions is expected to the coloured in solution ?