Which of the following statements is false? 

1.	MnO2 dissolves in conc. HCl, but does not form Mn4+ ions.
2.	${\mathrm{MnO}}_2$ oxidizes hot concentrated ${\mathrm{H}}_2{\mathrm{SO}}_4$ liberating oxygen.
3.	${\mathrm{K}}_2{\mathrm{MnO}}_4$ is formed when ${\mathrm{MnO}}_2$ infused KOH is oxidized by air, ${\mathrm{KNO}}_3$, ${\mathrm{PbO}}_2$ or ${\mathrm{NaBiO}}_3$
4.	The decomposition of acidic ${\mathrm{KMnO}}_4$ is not catalyzed by sunlight.

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

Which of the following metals does not form amalgam?

1. Fe

2. Au

3. Zn

4. Ag

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

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

Which of the following elements has the strongest metallic bond?

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

The incorrect statement among the following regarding Cerium is :  

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^-