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The correct order of ionic radius of Y3+ , La3+ , Eu3+ and Lu3+ is
63Eu and 71Lu are the members of lanthanide series. Due to the lanthanide contraction, the sizes of Eu, Lu and La follow the order Lu < Eu < La.
The element 39Y belongs to the fifth period while Lu belongs to the sixth period, we expect their sizes to follow the order Y < Lu. Hence, the correct order is
Y3+ < Lu3+ < Eu3+ < La3+
In Ramsay and Rayleigh's isolation of noble gases from air, the nitrogen of the air is finally converted into
Which of the following pairs represents linkage isomers ?
Alkyl cyanides undergo Stephen reduction to produce
Reduction of alkyl cyanide with SnCl2|HCl to form an aldehyde is known as Stephen ‘s reduction.
The perimeter of a sector is a constant. If its area is to be maximum, then the sectorial angle is
The best method to prepare cyclohexene from cyclohexanol is by using
If f(x) = tan x - tan3 x + tan5 x - ... ∞ with 0 < x < π/4, then
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