Which of the following compounds is expected to be colourless?

Which one of the following is an example of non-$typical$ transition elements?

Which of the following statements is not true for transition elements?

Elements after atomic number $103$ have been discovered. If an element with atomic number $106$ is considered,which of the following electronic configurations will it possess?

The number of unpaired electrons in $Co^{2+}$ is:

The number of unpaired electrons in $Zn^{2+}$ is