Explain the activity series (or reactivity) series of metals.Also mention its significance.

State Kirchhoff's voltage law and mention its significance.

Explain the folloiwng facts: The metallic radii of the 3rd (5d) series of transition metals are nearly the same as those of the corresponding members of the 2nd series.

Explain the following : Why is the series arrangement not used for domestic circuits?

Name the oxometal anions of the first series of the transition metals in which the metal exhibits the oxidation state equal to its group number.