19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which of the following compounds is green in colour ?
Heat 4K Cr O 4K CrO 3O X -> . In the above reaction X is
Which of the following oxides of chromium is amphoteric in nature ?
Chromyl chloride, CrO2Cl2, is prepared by heating a mixture of
The transition metals sometimes form nonstoichiometric compounds. These compounds have (a) definite structures and definite proportions
The transition elements are
Which one of the following oxides of chromium is amphoteric in nature ?
Which of the following ions is expected to the coloured in solution ?
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 electronic configurations represents Fe3+ ?
Which of the following ions is diamagnetic ?
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 ions is paramagnetic ?
The highest possible oxidation state shown by osmium in its compounds is
Which of the following does not possess unpaired electrons ?
Which of the following ions has the maximum number of unpaired d electrons ?
Which of the following is not true about the transition elements ?
Which of the following statements is correct ?
Which of the following elements has completely filled d orbitals (the d10 configuration) ?
The manganate and permanganate ions are tetrahedral, due to: (NEET 2019)
Among the transition metals, the melting points of Zn, Cd and Hg are relatively low because
Which of the following elements has completely filled d orbitals (the d10 configuration) ?
The electronic configurations of the first four members of the actinide series cannot be written accurately in a regular manner because of
The last electron of a d-block element occupies the orbital