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Among the following, the incorrect statement regarding interstitial compounds is:
The reason for lanthanoid contraction is:
The correct electronic configuration of Gadolinium (Atomic number = 64) is:
The incorrect statement among the following is:
Which one of the following elements is unable to form $MF_6^{3-}$ ion?
A pair among the following that have the same size is:
Which of the following species is colourless?
Identify the incorrect statement among the following:
The catalytic activity of transition metals and their compounds is ascribed mainly to:
Gadolinium has a low value of third ionisation enthalpy because of:
Identify the incorrect statement.
Which of the following ions displays the d-d transition and paramagnetism?
Zinc can be coated on iron to produce galvanised iron, but the reverse is not possible because:
When copper is heated with conc. $\text{HNO}_3$ it produces:
The electronic configurations of $\text{Eu}$ (Atomic no. $63$), $\text{Gd}$ (Atomic no. $64$), and $\text{Tb}$ (Atomic no. $65$) are, respectively:
For a cell involving one electron $E^\circ_{cell} = 0.59\text{ V}$ at $298\text{ K}$, the equilibrium constant for the cell reaction is : [Given that $\frac{2.303 RT}{F} = 0.059\text{ V at } T = 298\text{ K}$]
Gadolinium belongs to 4f series. It’s atomic number is $64$. Which of the following is the correct electronic configuration of gadolinium?
Find out the solubility of $Ni(OH)_2$ in 0.1 M $NaOH$. Given that the ionic product of $Ni(OH)_2$ is $2 \times 10^{-15}$
Which one is malachite from the following?
Which one of the following is the correct match of the events occurring during the menstrual cycle?