Which of the following may be colourless

  • A

    $C{r^{ + 3}}$

  • B

    $C{u^ + }$

  • C

    $F{e^{ + 3}}$

  • D

    $C{u^{2 + }}$

Similar Questions

The transition element that has lowest enthalpy of atomisation is

  • [JEE MAIN 2019]

Given below are two statements, one is labelled as Assertion $A$ and the other is labelled as Reason $R$.

Assertion $A:$ The spin only magnetic moment value for $\left[ Fe ( CN )_6\right]^{3-}$ is $1.74 BM$, whereas for $\left[ Fe \left( H _2 O \right)_6\right]^{3+}$ is $5.92\,BM$.

Reason $R :$ In both complexes, $Fe$ is present in +3 oxidation state.

In the light of the above statements, choose the correct answer from the options given below:

  • [JEE MAIN 2023]

Correct statement for $3d-$ series is

A pink colored salt on dry heating becomes blue in colour. Salt may contain 

The correct order of the first ionization enthalpies is

  • [JEE MAIN 2019]