Which of the following is not a consequence of lanthanide contraction?

Which of the following is amphoteric?

Silver bromide is used in photography.

Which of the following is not a property of lanthanides?

Which compound forms double salt with sulphates of alkali metals?

Which is the most stable oxidation state of actinoids?

What is the end product formed when KMnO4 reacts with HCl?

Which of the following element belongs to the second transition series of the periodic table?