The incorrect statement among the following regarding Cerium is :  

1.	The +4 oxidation state of cerium is not known in solutions.
2.	The +3 oxidation state of cerium is more stable than the +4 oxidation state.
3.	The common oxidation states of cerium are +3, and +4.
4.	Cerium (IV) acts as an oxidizing agent.

The native silver metal forms a water-soluble complex with a dilute aqueous solution of NaCN in the presence of :

1. Nitrogen

2. Oxygen

3. Carbon dioxide

4. Argon

Which compound cannot decolourise KMnO₄ solution?

1. CO₃^-2

2. NO₂^-

3. S^2-

4. Cl^-

The ionization potential values of d-block elements as compared to the ionization potential values of f-block elements are:

Which of the following elements has the strongest metallic bond?

The incorrect statement among the following about the chemistry of 3d and 4f series elements is 

The element of the first transition series having lowest oxidation potential value $(\mathrm{M}\to {\mathrm{M}}^{2+}+2{\mathrm{e}}^{-})$ is -

1. Mn

2. Fe

3. Ni

4. Cu

Which of the following metals does not form amalgam?

1. Fe

2. Au

3. Zn

4. Ag

The addition of non-metals like B and C to the interstitial sites of a transition metal increases

1. Ductility

2. Melting Point

3. Shining

4. Conductivity

Find the false statement among the following regarding manganese compounds.