Because of lanthanoid contraction, which of thefollowing pairs of elements have nearly same atomicradii ? (Nubmers in the parenthesis are atomicnumbers).
Due to lanthanoid contractionatomic radii of Zr and Hf is almost similar.
Which of the following processes does not involveoxidation of iron ?
A mixture of gases contains H2 and O2 gases in theratio of 1 : 4 (w/w). What is the molar ratio of thetwo gases in the mixture ?
Cobalt (III) chloride forms several octahedralcomplexes with ammonia. Which of the followingwill not give test of chloride ions with silver nitrateat 25ºC ?
The reaction
Consider the following compounds
