d and f Block Elements · Chemistry · KCET

In the following pairs, the one in which both transition metal ions are colourless is

A member of the Lanthanoid series which is well known to exhibit +4 oxidation state is

In which of the following pairs, both the elements do not have $(n-1) d^{10} n s^2$ configuration?

MnO exhibits

The transition element $(\approx 5 \%)$ present with lanthanoid metal in misch metal is

Match the following.

I. $\mathrm{Zn}^{2+}\quad$ (i) $d^8$ configuration

II. $\mathrm{Cu}^{2+}\quad$ (ii) Colourless

III. $\mathrm{Ni}^{2+}\quad$ (iii) $\mu=1.73 \mathrm{BM}$

Which of the following statements related to lanthanoids is incorrect?

Which of the following is correct with respect to melting point of a transition element?

A transition metal exists in its highest oxidation state. It is expected to behave as

What will be the value of $$x$$ in $$\mathrm{Fe}^{x+}$$, if the magnetic moment, $$\mu=\sqrt{24} \mathrm{~BM}$$ ?

The only lanthanoid which is radioactive

Which of the following does not represent property stated against it?

Which one of the following is correct for all elements from Sc to Cu?

Which of the following pairs has both the ions coloured in aqueous solution? [Atomic numbers of

$$\mathrm{Sc}=21, \mathrm{Ti}=22, \mathrm{Ni}=28, \mathrm{Cu}=29, \mathrm{Mn}=25]$$

Identify the set of paramagnetic ions among the following.

For $$\mathrm{Cu}_2 \mathrm{Cl}_2$$ and $$\mathrm{CuCl}_2$$ in aqueous medium, which of the following statement is correct?

The elements in which electrons are progressively filled in $$4 f$$-orbital are called

Incorrect statement with reference to $$\mathrm{Ce}(Z=58)$$ is

A mixture of $$\mathrm{NaCl}$$ and $$\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$$ is heated with conc. $$\mathrm{H}_2 \mathrm{SO}_4$$, deep red vapours are formed. Which of the following statements is false?

Which of the following statements is wrong?

Oxidation state of copper is +1 in